test(ai-chat): cover the #161 New-chat-during-stream reset + changelog

Address PR #162 review must-fixes:

- CHANGELOG: add an [Unreleased] > Fixed bullet for #161 (New chat during
  the first turn's stream now resets the thread; a late refetch/onFinish
  from the abandoned thread no longer pulls the user back in).
- Re-anchor the stale startNewChat/cancelPendingAdoption test to selectChat:
  startNewChat now calls startFreshThread, but cancelPendingAdoption still
  backs selectChat, so the disarm guard is decoupled and kept valid.
- Add a test pinning that startFreshThread() disarms the armed error-path
  fallback (the justification for dropping cancelPendingAdoption from
  startNewChat).
- Add a ChatThread render test (mocked useChat) asserting the onError branch
  forwards onTurnFinished(undefined, threadKey).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.env.example

@@ -123,11 +123,45 @@ MCP_DOCMOST_PASSWORD=
 # expose the port publicly).
 # MCP_TOKEN=
 # MCP_SESSION_IDLE_MS=1800000
+#
+# AI-AGENT ATTRIBUTION (comments/pages written via MCP are badged as "AI"):
+# attribution is driven by a per-user `is_agent` flag on the users row. There is
+# NO admin UI/API for it — set it out-of-band with SQL. Use a DEDICATED service
+# account for the MCP fallback above and flag ONLY that account, e.g.:
+#     UPDATE users SET is_agent = true WHERE email = 'mcp-bot@your-domain';
+# NEVER set is_agent on a human or shared account — every action by that account
+# (including normal human edits) would then be mis-attributed as AI.
 
 # Per-embedding-call timeout in milliseconds for the RAG indexer.
 # A slow/hung embeddings endpoint fails after this and the batch continues.
 # AI_EMBEDDING_TIMEOUT_MS=120000
 
+# Silence timeout (ms) for streaming chat/agent AI calls AND external-MCP traffic.
+# Bounds time-to-first-byte and the gap BETWEEN chunks (NOT the total turn length),
+# so an arbitrarily long turn that keeps streaming is never cut. Finite so a hung
+# provider is eventually broken instead of leaking forever. Default 900000 (15 min).
+# AI_STREAM_TIMEOUT_MS=900000
+
+# Keep-alive recycle window (ms) for streaming chat/agent AI + external-MCP calls.
+# A pooled connection idle longer than this is closed instead of reused, so a
+# NAT / egress firewall / reverse proxy that silently drops idle connections
+# cannot poison a reused socket into a PRE-RESPONSE `read ECONNRESET`. Lower it if
+# your egress drops idle connections faster than ~10s. Default 10000 (10 s).
+# AI_STREAM_KEEPALIVE_MS=10000
+
+# Silence timeout (ms) for EXTERNAL-MCP transport ONLY (not the chat provider).
+# Tighter than AI_STREAM_TIMEOUT_MS so a byte-silent/hung MCP server is broken in
+# ~5 min instead of 15. Note it also cuts a legitimately long but byte-silent
+# single tool call (a slow crawl that emits nothing until done) and an SSE
+# transport idling >5 min BETWEEN tool calls. Default 300000 (5 min).
+# AI_MCP_STREAM_TIMEOUT_MS=300000
+
+# Total wall-clock cap (ms) for ONE external MCP tool call (app-level, not
+# transport). Aborts a tool that keeps the socket warm (SSE heartbeats / trickle)
+# but never returns a result — which the silence timeout above never breaks.
+# Default 900000 (15 min).
+# AI_MCP_CALL_TIMEOUT_MS=900000
+
 # --- Anonymous public-share AI assistant ---
 # Opt-in per workspace (AI settings -> "public share assistant"; off by default).
 # When enabled, anonymous visitors of a published share can ask an AI about that

.github/workflows/test.yml

@@ -15,6 +15,38 @@ permissions:
 jobs:
   test:
     runs-on: ubuntu-latest
+    # Real Postgres + Redis so the server integration suite (`*.int-spec.ts`,
+    # behind `pnpm --filter server test:int`) runs in CI (red-team finding #7).
+    # Without it, cost-cap / FK-cascade / jsonb-round-trip / real-apply tests
+    # only ran locally, so regressions in those paths stayed green in CI.
+    # Postgres uses the pgvector image because migrations create vector columns
+    # and global-setup runs `CREATE EXTENSION vector`. Credentials/db match the
+    # defaults in apps/server/test/integration/db.ts + global-setup.ts
+    # (docmost / docmost_dev_pw, maintenance db `docmost`, redis on 6379), so no
+    # TEST_*_URL overrides are needed.
+    services:
+      postgres:
+        image: pgvector/pgvector:pg18
+        env:
+          POSTGRES_USER: docmost
+          POSTGRES_PASSWORD: docmost_dev_pw
+          POSTGRES_DB: docmost
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd "pg_isready -U docmost"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      redis:
+        image: redis:7
+        ports:
+          - 6379:6379
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -36,5 +68,12 @@ jobs:
       - name: Build editor-ext
         run: pnpm --filter @docmost/editor-ext build
 
-      - name: Run tests
+      - name: Run unit tests
         run: pnpm -r test
+
+      # Integration suite against the real Postgres/Redis services above. Runs
+      # the FK-cascade, cost-cap, jsonb-round-trip and real-apply specs that the
+      # unit run (mocks only) cannot cover. global-setup drops/recreates the
+      # isolated `docmost_test` DB and migrates it to latest.
+      - name: Run server integration tests
+        run: pnpm --filter server test:int

.vscode/tasks.json

@@ -0,0 +1,14 @@
+{
+  // VSCode tasks for this repo.
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "git push (github + gitea)",
+      "type": "shell",
+      "command": "git push github develop && git push gitea develop",
+      "options": { "cwd": "${workspaceFolder}" },
+      "presentation": { "reveal": "never", "focus": false, "panel": "shared", "showReuseMessage": false, "close": true },
+      "problemMatcher": []
+    }
+  ]
+}

AGENTS.md

@@ -157,6 +157,19 @@ below.
 | `origin` | GitHub mirror `vvzvlad/gitmost` — **do not push**, updated by the owner's CI |
 | `upstream` | The original Docmost — **never push** |
 
+## Creating issues (Gitea `tea` CLI)
+
+Issues are filed with the official Gitea CLI `tea`, already logged in as
+`claude_code` (`tea logins list` shows the `gitea` login as default):
+
+```bash
+tea issues create --repo vvzvlad/gitmost --labels feature \
+  --title '<title>' --description "$(cat body.md)"
+```
+
+> Gotcha (tea 0.14.1): the issue body flag is `--description`/`-d`, **not**
+> `--body` — passing `--body` fails with `flag provided but not defined: -body`.
+
 ---
 
 # Architecture and codebase
@@ -210,7 +223,7 @@ pnpm --filter @docmost/mcp test                  # node --test (unit + mock)
 pnpm --filter @docmost/mcp test:e2e              # MCP end-to-end against a live instance
 ```
 
-**Database migrations** (Kysely, run from `apps/server`; they auto-run on server startup too):
+**Database migrations** (Kysely, run from `apps/server`). **Where they auto-apply:** in **production** (the built image / `start:prod`) pending migrations run automatically on server boot. In **local dev** (the `pnpm dev` stand / `nest start --watch`) they do **NOT** auto-run — after you pull or switch branches you must apply them yourself with `pnpm --filter server migration:latest`, or any endpoint touching a new column/table 500s (e.g. a freshly-added `ai_chats.page_id` blanket-500s all of AI chat until migrated).
 ```bash
 pnpm --filter server migration:create --name=my_change   # new empty migration
 pnpm --filter server migration:latest                    # apply all pending

CHANGELOG.md

@@ -10,8 +10,65 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- **Persistent AI-chat history as the source of truth + server-side export.**
+  An assistant turn is now persisted to the database step by step: the row is
+  inserted upfront as `streaming` and updated as each agent step finishes, then
+  finalized once to `completed`/`error`/`aborted`. A process that dies mid-turn
+  keeps every finished step, and a startup sweep flips any dangling `streaming`
+  row (untouched for 10 minutes) to `aborted`. Chat "Copy" now exports
+  server-side from these rows (`POST /ai-chat/export`) rather than from live
+  client state, so the export is identical whether a chat is freshly streaming,
+  just switched to, or reloaded — and is available from the first turn of a new
+  chat. (#183, #174)
+
+- **AI-agent attribution for MCP writes.** Comments (and pages) created through
+  the MCP endpoint by a dedicated agent account are now badged as "AI", with
+  unspoofable provenance derived from a per-user `is_agent` flag (not from the
+  request body). **Operator setup:** use a _dedicated_ service account for the
+  MCP fallback and set the flag with SQL —
+  `UPDATE users SET is_agent = true WHERE email = '<mcp-account>'`. Never flag a
+  human or shared account, or its normal edits get mis-attributed as AI. See the
+  AI-agent block in `.env.example`. (#143)
+- **Footnote import diagnostics.** The MCP page-write tools (`create_page`,
+  `update_page`, `import_page_markdown`) now return a `footnoteWarnings` array
+  flagging dangling references, empty or duplicate definitions, and `[^id]`
+  markers inside table rows, so an agent can fix its own markup. The page is
+  still created; the field is omitted when there are no problems. (#166)
+- **AI chat "Protocol" setting (`chatApiStyle`).** A new admin choice in AI
+  settings for the `openai` driver: `openai-compatible` (default) routes chat
+  through `@ai-sdk/openai-compatible`, which surfaces a provider's streamed
+  reasoning (`reasoning_content` → reasoning parts) for z.ai/GLM, DeepSeek,
+  OpenRouter, etc.; `openai` uses the official provider (real-OpenAI
+  reasoning-model request shaping). Chosen explicitly rather than inferred from
+  the base URL, since a custom URL can front real OpenAI too. (#175, #177)
+- **Per-MCP-server instructions in the agent prompt.** Each external MCP server
+  now has an admin-authored `instructions` field ("how/when to use this server's
+  tools") that is injected into the agent's system prompt next to that server's
+  tool descriptions. Trusted text, rendered inside the prompt safety sandwich;
+  shown only for a server that actually connected and contributed ≥1 callable
+  tool. (#180)
+- **Footnote multi-backlinks.** A footnote referenced more than once now shows a
+  back-link per reference (↩ a b c …), each scrolling to its own occurrence, like
+  Pandoc/Wikipedia; a single-reference footnote keeps the plain ↩. (#168)
+
 ### Changed
 
+- **AI chat default provider is now `openai-compatible` (reasoning surfaced).**
+  For the `openai` driver the chat provider defaults to the openai-compatible
+  implementation, so a workspace pointing at z.ai/GLM/DeepSeek now streams the
+  model's reasoning out of the box. An endpoint that is real OpenAI behind a
+  custom base URL should set the new `chatApiStyle` "Protocol" to `openai`. (#177)
+
+- **Footnotes now reuse (Pandoc semantics).** Multiple `[^a]` references to the
+  same id are ONE footnote — one number, one definition, several back-references
+  — instead of being renamed to `a__2`, `a__3`. Duplicate `[^a]:` definitions are
+  first-wins on import (the rest are dropped and reported via `footnoteWarnings`),
+  and a reference with no definition yields a single empty footnote rather than
+  one per occurrence. This supersedes the 0.93.0 "survive duplicate-id
+  definitions" behavior for the import path. (#166)
+
 - **Public share AI: default per-workspace hourly assistant cap lowered
   300 → 100.** The limiter falls back to this default whenever
   `SHARE_AI_WORKSPACE_MAX_PER_HOUR` is unset, so a `0.93.0` deployment that
@@ -19,6 +76,33 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   cut from 300 to 100 on upgrade. Set `SHARE_AI_WORKSPACE_MAX_PER_HOUR` to
   keep the previous limit. (#62)
 
+### Fixed
+
+- **Editor: caret/selection landed on the wrong line when clicking inside code
+  blocks and footnotes.** The affected NodeViews rendered their non-editable
+  chrome (language menu, footnotes heading, footnote number marker) before the
+  editable content, so the browser's click hit-testing missed the contentDOM and
+  snapped the caret to a previous node. Content now renders first in the DOM
+  (chrome is lifted back into place via CSS flex `order`), and scroll containers
+  are nudged after a paste to refresh stale hit-testing geometry. The caret
+  symptom is macOS-specific and was confirmed manually on macOS; the automated
+  guard pins the DOM-order invariant, not the caret behavior itself. (#146, #147)
+- **AI chat: the live token counter now ticks between agent steps.** During a
+  multi-step turn the header token badge (and the "Thinking… · N tokens" line)
+  no longer froze on the previous step's authoritative usage; the current step's
+  estimate is combined per-component with `max`, so the count rises smoothly and
+  never jumps backwards. (#163)
+- **AI chat: "New chat" pressed during the first turn's stream now resets the
+  thread instead of leaving the old turn streaming.** While a brand-new,
+  not-yet-adopted chat streamed its first turn, hitting "New chat" left
+  `activeChatId === null` (a no-op for the atom), so the reconciler never
+  remounted and the in-flight thread kept streaming behind the fresh one — and a
+  late refetch / late `onFinish` from that abandoned thread could yank the user
+  back into the chat they just left. "New chat" now forces a fresh empty thread
+  unconditionally and the finished thread's mount key is checked so a late
+  callback from an abandoned thread no longer adopts or re-arms the fallback.
+  (#161)
+
 ## [0.93.0] - 2026-06-21
 
 This release builds on the 0.91.0 AI foundation: admin-defined AI agent roles,
@@ -101,8 +185,7 @@ embeds — plus a large batch of security hardening and test coverage.
 - Page templates: import `ThrottleModule` so collab boots, never strand an
   in-flight page-embed id, and add defense-in-depth workspace checks.
 - Pages: `movePage` cycle guard with no phantom `PAGE_MOVED` event.
-- Import: surface the real error cause from `/pages/import` instead of a generic
-  400.
+- Import: surface the real error cause from `/pages/import` instead of a generic 400.
 
 ### Security
 

apps/client/public/locales/en-US/translation.json

@@ -258,6 +258,7 @@
   "Copy to space": "Copy to space",
   "Copy chat": "Copy chat",
   "Copied": "Copied",
+  "Failed to export chat": "Failed to export chat",
   "Duplicate": "Duplicate",
   "Select a user": "Select a user",
   "Select a group": "Select a group",
@@ -420,6 +421,8 @@
   "{{count}} command available_other": "{{count}} commands available",
   "{{count}} result available_one": "1 result available",
   "{{count}} result available_other": "{{count}} results available",
+  "{{count}} result found_one": "{{count}} result found",
+  "{{count}} result found_other": "{{count}} results found",
   "Equal columns": "Equal columns",
   "Left sidebar": "Left sidebar",
   "Right sidebar": "Right sidebar",
@@ -708,6 +711,7 @@
   "Authorization header": "Authorization header",
   "Tool allowlist": "Tool allowlist",
   "Optional. Leave empty to allow all tools the server exposes.": "Optional. Leave empty to allow all tools the server exposes.",
+  "Optional guidance for the agent on how and when to use this server's tools. Injected into the system prompt. The server's tools are namespaced as \"<server name>_*\".": "Optional guidance for the agent on how and when to use this server's tools. Injected into the system prompt. The server's tools are namespaced as \"<server name>_*\".",
   "Test": "Test",
   "Available tools": "Available tools",
   "No tools available": "No tools available",
@@ -1075,6 +1079,8 @@
   "Undo": "Undo",
   "Redo": "Redo",
   "Backlinks": "Backlinks",
+  "Back to references": "Back to references",
+  "Back to reference {{label}}": "Back to reference {{label}}",
   "Last updated by": "Last updated by",
   "Last updated": "Last updated",
   "Stats": "Stats",
@@ -1127,15 +1133,32 @@
   "Removed from favorites": "Removed from favorites",
   "Added {{name}} to favorites": "Added {{name}} to favorites",
   "Removed {{name}} from favorites": "Removed {{name}} from favorites",
+  "Label added": "Label added",
+  "Label removed": "Label removed",
+  "Image updated": "Image updated",
+  "Unsupported image type": "Unsupported image type",
+  "Member deactivated": "Member deactivated",
+  "Member activated": "Member activated",
+  "Name is required": "Name is required",
+  "Name must be 40 characters or fewer": "Name must be 40 characters or fewer",
+  "Group name must be at least 2 characters": "Group name must be at least 2 characters",
+  "Group name must be 100 characters or fewer": "Group name must be 100 characters or fewer",
+  "Description must be 500 characters or fewer": "Description must be 500 characters or fewer",
+  "Invalid invitation link": "Invalid invitation link",
   "Page menu for {{name}}": "Page menu for {{name}}",
   "Create subpage of {{name}}": "Create subpage of {{name}}",
   "AI chat": "AI chat",
   "Ask a question about this documentation.": "Ask a question about this documentation.",
   "Ask a question…": "Ask a question…",
   "Thinking…": "Thinking…",
+  "Thinking… · {{count}} tokens": "Thinking… · {{count}} tokens",
+  "Thinking… · {{count}} tokens_one": "Thinking… · {{count}} token",
+  "Thinking… · {{count}} tokens_other": "Thinking… · {{count}} tokens",
+  "Thinking · {{count}} tokens": "Thinking · {{count}} tokens",
+  "Thinking · {{count}} tokens_one": "Thinking · {{count}} token",
+  "Thinking · {{count}} tokens_other": "Thinking · {{count}} tokens",
   "The assistant is unavailable right now. Please try again.": "The assistant is unavailable right now. Please try again.",
   "Public share assistant": "Public share assistant",
-  "Enabled": "Enabled",
   "Let anonymous visitors of public shares ask an AI assistant scoped to that share's pages. You pay for the tokens.": "Let anonymous visitors of public shares ask an AI assistant scoped to that share's pages. You pay for the tokens.",
   "Public assistant model": "Public assistant model",
   "Defaults to the chat model": "Defaults to the chat model",
@@ -1145,6 +1168,7 @@
   "Built-in assistant persona": "Built-in assistant persona",
   "Minimize": "Minimize",
   "Current context size": "Current context size",
+  "Tokens generated this turn": "Tokens generated this turn",
   "AI agent": "AI agent",
   "Take a look at the current document": "Take a look at the current document",
   "AI agent is typing…": "AI agent is typing…",
@@ -1154,6 +1178,9 @@
   "Queue message": "Queue message",
   "Remove queued message": "Remove queued message",
   "Stop": "Stop",
+  "Response stopped.": "Response stopped.",
+  "Connection lost — the answer was interrupted.": "Connection lost — the answer was interrupted.",
+  "Response stopped (manually or the connection dropped).": "Response stopped (manually or the connection dropped).",
   "Chat menu": "Chat menu",
   "No chats yet.": "No chats yet.",
   "Delete this chat?": "Delete this chat?",
@@ -1185,8 +1212,11 @@
   "Semantic search": "Semantic search",
   "Voice / STT": "Voice / STT",
   "Voice dictation": "Voice dictation",
+  "Streaming dictation": "Streaming dictation",
+  "Transcribe as you speak, cutting on pauses": "Transcribe as you speak, cutting on pauses",
   "Voice dictation is not available yet.": "Voice dictation is not available yet.",
   "Test endpoint": "Test endpoint",
+  "Save and test": "Save and test",
   "Save endpoints": "Save endpoints",
   "Configured and enabled": "Configured and enabled",
   "Configured but disabled": "Configured but disabled",
@@ -1219,6 +1249,8 @@
   "No microphone found": "No microphone found",
   "Could not start recording": "Could not start recording",
   "Transcription failed": "Transcription failed",
+  "Transcribe": "Transcribe",
+  "No speech detected": "No speech detected",
   "Voice dictation is not configured": "Voice dictation is not configured",
   "Microphone is unavailable or already in use": "Microphone is unavailable or already in use",
   "Audio recording is not available in this browser/context": "Audio recording is not available in this browser/context",
@@ -1245,6 +1277,10 @@
   "Optional. Defaults to the workspace model.": "Optional. Defaults to the workspace model.",
   "e.g. gpt-4o-mini": "e.g. gpt-4o-mini",
   "If you choose a different provider, it must already be configured in AI settings.": "If you choose a different provider, it must already be configured in AI settings.",
+  "Start automatically": "Start automatically",
+  "When on, picking this role sends a launch message and starts the chat. When off, the role is selected and you type the first message yourself.": "When on, picking this role sends a launch message and starts the chat. When off, the role is selected and you type the first message yourself.",
+  "Launch message": "Launch message",
+  "Sent automatically when this role is picked. Leave empty to use the default text. Ignored when “Start automatically” is off.": "Sent automatically when this role is picked. Leave empty to use the default text. Ignored when “Start automatically” is off.",
   "Agent roles": "Agent roles",
   "Reusable presets that shape the agent's behavior (and optionally its model). Picked when starting a new chat.": "Reusable presets that shape the agent's behavior (and optionally its model). Picked when starting a new chat.",
   "No roles configured": "No roles configured",
@@ -1264,5 +1300,20 @@
   "Embeds run inside a sandboxed iframe with a separate origin, so they cannot read or modify the page they are embedded in.": "Embeds run inside a sandboxed iframe with a separate origin, so they cannot read or modify the page they are embedded in.",
   "Turning this off hides existing embeds (they render as a disabled placeholder) and stops serving them on public share pages.": "Turning this off hides existing embeds (they render as a disabled placeholder) and stops serving them on public share pages.",
   "Analytics / tracker": "Analytics / tracker",
-  "Injected verbatim into the <head> of PUBLIC SHARE pages only (same-origin). For analytics snippets (Google Analytics, Yandex.Metrika, etc.). Admin only.": "Injected verbatim into the <head> of PUBLIC SHARE pages only (same-origin). For analytics snippets (Google Analytics, Yandex.Metrika, etc.). Admin only."
+  "Injected verbatim into the <head> of PUBLIC SHARE pages only (same-origin). For analytics snippets (Google Analytics, Yandex.Metrika, etc.). Admin only.": "Injected verbatim into the <head> of PUBLIC SHARE pages only (same-origin). For analytics snippets (Google Analytics, Yandex.Metrika, etc.). Admin only.",
+  "Go to login page": "Go to login page",
+  "Move to space": "Move to space",
+  "Float left (wrap text)": "Float left (wrap text)",
+  "Float right (wrap text)": "Float right (wrap text)",
+  "Switch to tree": "Switch to tree",
+  "Switch to flat list": "Switch to flat list",
+  "Toggle subpages display mode": "Toggle subpages display mode",
+  "Page tree (child pages, recursive)": "Page tree (child pages, recursive)",
+  "Render the full nested tree of all descendant pages": "Render the full nested tree of all descendant pages",
+  "Showing {{count}} subpages_one": "Showing {{count}} subpage",
+  "Showing {{count}} subpages_other": "Showing {{count}} subpages",
+  "Protocol": "Protocol",
+  "How chat requests are sent and how reasoning is surfaced": "How chat requests are sent and how reasoning is surfaced",
+  "OpenAI-compatible (surfaces reasoning)": "OpenAI-compatible (surfaces reasoning)",
+  "OpenAI (official)": "OpenAI (official)"
 }

apps/client/public/locales/ru-RU/translation.json

@@ -257,6 +257,7 @@
   "Copy": "Копировать",
   "Copy to space": "Копировать в пространство",
   "Copied": "Скопировано",
+  "Failed to export chat": "Не удалось экспортировать чат",
   "Duplicate": "Дублировать",
   "Select a user": "Выберите пользователя",
   "Select a group": "Выберите группу",
@@ -385,6 +386,11 @@
   "Quote": "Цитата",
   "Image": "Изображение",
   "Audio": "Аудио",
+  "Transcribe": "Транскрибировать",
+  "Transcribing…": "Транскрибация…",
+  "No speech detected": "Речь не распознана",
+  "Transcription failed": "Не удалось распознать речь",
+  "Voice dictation is not configured": "Голосовой ввод не настроен",
   "Embed PDF": "Встроить PDF",
   "Upload and embed a PDF file.": "Загрузите и встроите PDF-файл.",
   "Embed as PDF": "Встроить как PDF",
@@ -400,6 +406,8 @@
   "Footnote {{number}}": "Сноска {{number}}",
   "Go to footnote": "Перейти к сноске",
   "Back to reference": "Вернуться к ссылке",
+  "Back to references": "Вернуться к ссылкам",
+  "Back to reference {{label}}": "Вернуться к ссылке {{label}}",
   "Empty footnote": "Пустая сноска",
   "Math inline": "Строчная формула",
   "Insert inline math equation.": "Вставить математическое выражение в строку.",
@@ -672,9 +680,21 @@
   "Ask AI": "Спросить ИИ",
   "AI agent": "AI-агент",
   "Take a look at the current document": "Посмотри текущий документ",
+  "Start automatically": "Запускать автоматически",
+  "When on, picking this role sends a launch message and starts the chat. When off, the role is selected and you type the first message yourself.": "Когда включено, выбор этой роли отправляет стартовое сообщение и начинает чат. Когда выключено, роль выбирается, а первое сообщение вы вводите сами.",
+  "Launch message": "Стартовое сообщение",
+  "Sent automatically when this role is picked. Leave empty to use the default text. Ignored when “Start automatically” is off.": "Отправляется автоматически при выборе этой роли. Оставьте пустым, чтобы использовать текст по умолчанию. Игнорируется, когда «Запускать автоматически» выключено.",
   "AI agent is typing…": "AI-агент печатает…",
   "{{name}} is typing…": "{{name}} печатает…",
   "Thinking…": "Думаю…",
+  "Thinking… · {{count}} tokens": "Думаю… · {{count}} токенов",
+  "Thinking… · {{count}} tokens_one": "Думаю… · {{count}} токен",
+  "Thinking… · {{count}} tokens_few": "Думаю… · {{count}} токена",
+  "Thinking… · {{count}} tokens_many": "Думаю… · {{count}} токенов",
+  "Thinking · {{count}} tokens": "Размышления · {{count}} токенов",
+  "Thinking · {{count}} tokens_one": "Размышления · {{count}} токен",
+  "Thinking · {{count}} tokens_few": "Размышления · {{count}} токена",
+  "Thinking · {{count}} tokens_many": "Размышления · {{count}} токенов",
   "Agent role": "Роль агента",
   "AI chat": "AI-чат",
   "AI chat is disabled for this workspace.": "AI-чат отключён для этого рабочего пространства.",
@@ -685,6 +705,7 @@
   "Copy chat": "Копировать чат",
   "Created successfully": "Успешно создано",
   "Current context size": "Текущий размер контекста",
+  "Tokens generated this turn": "Токенов сгенерировано за ход",
   "Delete this chat?": "Удалить этот чат?",
   "Deleted successfully": "Успешно удалено",
   "Edited by AI agent on behalf of {{name}}": "Отредактировано AI-агентом от имени {{name}}",
@@ -731,6 +752,8 @@
   "Manage API keys for all users in the workspace. View the <anchor>API documentation</anchor> for usage details.": "Управляйте API-ключами для всех пользователей в рабочем пространстве. Смотрите <anchor>документацию по API</anchor> для получения информации об использовании.",
   "View the <anchor>API documentation</anchor> for usage details.": "Смотрите <anchor>документацию по API</anchor> для получения информации об использовании.",
   "View the <anchor>MCP documentation</anchor>.": "Смотрите <anchor>документацию по MCP</anchor>.",
+  "Instructions": "Инструкции",
+  "Optional guidance for the agent on how and when to use this server's tools. Injected into the system prompt. The server's tools are namespaced as \"<server name>_*\".": "Необязательное указание агенту, как и когда использовать инструменты этого сервера. Добавляется в системный промпт. Инструменты сервера именуются с префиксом «<имя сервера>_*».",
   "Sources": "Источники",
   "AI Answers not available for attachments": "Ответы ИИ недоступны для вложений",
   "No answer available": "Ответ недоступен",
@@ -1132,5 +1155,19 @@
   "Create subpage of {{name}}": "Создать подстраницу для {{name}}",
   "Dictation language": "Язык диктовки",
   "Auto-detect": "Автоопределение",
-  "Spoken language hint sent to the transcription model. Auto-detect lets the model decide.": "Подсказка языка речи для модели транскрипции. «Автоопределение» оставляет выбор за моделью."
+  "Spoken language hint sent to the transcription model. Auto-detect lets the model decide.": "Подсказка языка речи для модели транскрипции. «Автоопределение» оставляет выбор за моделью.",
+  "Float left (wrap text)": "Обтекание слева",
+  "Float right (wrap text)": "Обтекание справа",
+  "Switch to tree": "Переключить на дерево",
+  "Switch to flat list": "Переключить на плоский список",
+  "Toggle subpages display mode": "Переключить режим отображения подстраниц",
+  "Page tree (child pages, recursive)": "Дерево страниц (дочерние, рекурсивно)",
+  "Render the full nested tree of all descendant pages": "Показать полное вложенное дерево всех дочерних страниц",
+  "Showing {{count}} subpages_one": "Показано {{count}} подстраница",
+  "Showing {{count}} subpages_few": "Показано {{count}} подстраницы",
+  "Showing {{count}} subpages_many": "Показано {{count}} подстраниц",
+  "Protocol": "Протокол",
+  "How chat requests are sent and how reasoning is surfaced": "Как отправляются запросы чата и как показывается reasoning",
+  "OpenAI-compatible (surfaces reasoning)": "OpenAI-совместимый (показывает reasoning)",
+  "OpenAI (official)": "OpenAI (официальный)"
 }

apps/client/src/components/common/avatar-uploader.tsx

@@ -42,6 +42,23 @@ export default function AvatarUploader({
       return;
     }
 
+    // Validate file type. The `accept` attribute only filters the dialog;
+    // a user can still select a non-image file, which previously failed
+    // silently. Surface a visible error instead (issue #133). Accept any
+    // image/* MIME (png, jpeg, webp, gif, svg, ...) so we don't narrow below
+    // what the server accepts; only genuinely non-image files are rejected.
+    if (!file.type.startsWith("image/")) {
+      notifications.show({
+        message: t("Unsupported image type"),
+        color: "red",
+      });
+      // Reset the input
+      if (fileInputRef.current) {
+        fileInputRef.current.value = "";
+      }
+      return;
+    }
+
     // Validate file size (max 10MB)
     const maxSizeInBytes = 10 * 1024 * 1024;
     if (file.size > maxSizeInBytes) {
@@ -58,6 +75,8 @@ export default function AvatarUploader({
 
     try {
       await onUpload(file);
+      // Notify on success so the upload gives visible feedback (issue #128)
+      notifications.show({ message: t("Image updated") });
     } catch (error) {
       console.error(error);
       notifications.show({
@@ -117,7 +136,7 @@ export default function AvatarUploader({
         type="file"
         ref={fileInputRef}
         onChange={handleFileInputChange}
-        accept="image/png,image/jpeg,image/jpg"
+        accept="image/*"
         aria-label={ariaLabel}
         tabIndex={-1}
         style={{ display: "none" }}

apps/client/src/components/common/recent-changes.tsx

@@ -67,6 +67,7 @@ export default function RecentChanges({ spaceId }: Props) {
                     <Badge
                       color={getInitialsColor(page?.space.name)}
                       variant="light"
+                      tt="none"
                       component={Link}
                       to={getSpaceUrl(page?.space.slug)}
                       style={{ cursor: "pointer" }}

apps/client/src/components/icons/icon-columns-4.tsx

@@ -9,8 +9,10 @@ export function IconColumns4({ size = 24, stroke = 2 }: Props) {
   return (
     <svg
       xmlns="http://www.w3.org/2000/svg"
-      width={rem(size)}
-      height={rem(size)}
+      // rem(size) returns a `calc(...)` string, which is invalid for the raw
+      // SVG width/height length attributes ("Expected length, calc(...)"). Pass
+      // it via CSS style instead (matching the other icon components).
+      style={{ width: rem(size), height: rem(size) }}
       viewBox="0 0 24 24"
       fill="none"
       stroke="currentColor"

apps/client/src/components/icons/icon-columns-5.tsx

@@ -9,8 +9,10 @@ export function IconColumns5({ size = 24, stroke = 2 }: Props) {
   return (
     <svg
       xmlns="http://www.w3.org/2000/svg"
-      width={rem(size)}
-      height={rem(size)}
+      // rem(size) returns a `calc(...)` string, which is invalid for the raw
+      // SVG width/height length attributes ("Expected length, calc(...)"). Pass
+      // it via CSS style instead (matching the other icon components).
+      style={{ width: rem(size), height: rem(size) }}
       viewBox="0 0 24 24"
       fill="none"
       stroke="currentColor"

apps/client/src/components/layouts/global/app-header.tsx

@@ -5,7 +5,7 @@ import {
   Text,
   Tooltip,
 } from "@mantine/core";
-import { IconSparkles } from "@tabler/icons-react";
+import { IconMessage } from "@tabler/icons-react";
 import classes from "./app-header.module.css";
 import { BrandLogo } from "@/components/ui/brand-logo";
 import TopMenu from "@/components/layouts/global/top-menu.tsx";
@@ -107,7 +107,7 @@ export function AppHeader() {
                 aria-label={t("AI chat")}
                 onClick={() => setAiChatWindowOpen((v) => !v)}
               >
-                <IconSparkles size={20} />
+                <IconMessage size={20} />
               </ActionIcon>
             </Tooltip>
           )}

apps/client/src/components/layouts/global/global-app-shell.tsx

@@ -14,6 +14,7 @@ import { SpaceSidebar } from "@/features/space/components/sidebar/space-sidebar.
 import { AppHeader } from "@/components/layouts/global/app-header.tsx";
 import Aside from "@/components/layouts/global/aside.tsx";
 import AiChatWindow from "@/features/ai-chat/components/ai-chat-window.tsx";
+import GitmostGlobalBridge from "@/features/editor/gitmost/gitmost-global-bridge.tsx";
 import classes from "./app-shell.module.css";
 import { useToggleSidebar } from "@/components/layouts/global/hooks/hooks/use-toggle-sidebar.ts";
 import GlobalSidebar from "@/components/layouts/global/global-sidebar.tsx";
@@ -157,6 +158,10 @@ export default function GlobalAppShell({
     {/* Floating AI chat window. Mounted once globally; it is position: fixed
         and self-hides when closed, so its place in the tree is not critical. */}
     <AiChatWindow />
+      {/* Global gitmost native bridge: registers listSpaces / listPages /
+          createPageWithRecording on window.gitmost so the native host can
+          create a page with a recording even when no page editor is open. */}
+      <GitmostGlobalBridge />
     </>
   );
 }

apps/client/src/components/ui/ai-agent-badge.test.tsx

@@ -0,0 +1,96 @@
+import { describe, it, expect, vi } from "vitest";
+import { render, screen, fireEvent } from "@testing-library/react";
+import { MantineProvider } from "@mantine/core";
+import { Provider, createStore } from "jotai";
+import { AiAgentBadge } from "./ai-agent-badge";
+import {
+  activeAiChatIdAtom,
+  aiChatWindowOpenAtom,
+  aiChatDraftAtom,
+} from "@/features/ai-chat/atoms/ai-chat-atom.ts";
+
+// matchMedia (read by MantineProvider) is stubbed globally in vitest.setup.ts.
+
+function renderBadge(props: { authorName?: string; aiChatId?: string | null }) {
+  return render(
+    <MantineProvider>
+      <AiAgentBadge {...props} />
+    </MantineProvider>,
+  );
+}
+
+// Render a clickable badge inside an explicit jotai store, with a leftover draft
+// and an onActivate + parent-click spy, so the deep-link side effects are
+// assertable. Returns the store and spies.
+function setupClickable() {
+  const store = createStore();
+  store.set(aiChatDraftAtom, "leftover draft from another chat");
+  const onActivate = vi.fn();
+  const onParentClick = vi.fn();
+  render(
+    <Provider store={store}>
+      <MantineProvider>
+        <div onClick={onParentClick}>
+          <AiAgentBadge authorName="Bot" aiChatId="chat-1" onActivate={onActivate} />
+        </div>
+      </MantineProvider>
+    </Provider>,
+  );
+  return { store, onActivate, onParentClick, badge: screen.getByRole("button") };
+}
+
+function expectDeepLinked(store: ReturnType<typeof createStore>, onActivate: ReturnType<typeof vi.fn>) {
+  expect(store.get(activeAiChatIdAtom)).toBe("chat-1");
+  expect(store.get(aiChatWindowOpenAtom)).toBe(true);
+  expect(store.get(aiChatDraftAtom)).toBe(""); // draft cleared
+  expect(onActivate).toHaveBeenCalledTimes(1); // caller closes its own modal etc.
+}
+
+describe("AiAgentBadge", () => {
+  it("renders the AI-agent label", () => {
+    renderBadge({ authorName: "Bot" });
+    expect(screen.getByText("AI-agent")).toBeDefined();
+  });
+
+  it("is clickable (accessible button) when aiChatId is present", () => {
+    renderBadge({ authorName: "Bot", aiChatId: "chat-1" });
+    const badge = screen.getByRole("button");
+    expect(badge).toBeDefined();
+    expect(badge.textContent).toContain("AI-agent");
+  });
+
+  it("click deep-links: sets active chat, clears draft, opens window, fires onActivate, stops propagation", () => {
+    const { store, onActivate, onParentClick, badge } = setupClickable();
+    fireEvent.click(badge);
+    expectDeepLinked(store, onActivate);
+    expect(onParentClick).not.toHaveBeenCalled(); // stopPropagation contained the click
+  });
+
+  it.each(["Enter", " "])(
+    "keyboard %j activates the deep-link (same side effects as click)",
+    (key) => {
+      const { store, onActivate, badge } = setupClickable();
+      fireEvent.keyDown(badge, { key });
+      expectDeepLinked(store, onActivate);
+    },
+  );
+
+  it("an unrelated key does NOT activate the badge", () => {
+    const { store, onActivate, badge } = setupClickable();
+    fireEvent.keyDown(badge, { key: "Tab" });
+    expect(store.get(activeAiChatIdAtom)).toBeNull();
+    expect(store.get(aiChatWindowOpenAtom)).toBe(false);
+    expect(store.get(aiChatDraftAtom)).toBe("leftover draft from another chat");
+    expect(onActivate).not.toHaveBeenCalled();
+  });
+
+  it.each([{ aiChatId: null }, {}])(
+    "is a plain non-clickable label without a chat target (%o)",
+    (props) => {
+      renderBadge({ authorName: "Bot", ...props });
+      expect(screen.getByText("AI-agent")).toBeDefined();
+      // No interactive role is exposed when there is no chat to deep-link into.
+      expect(screen.queryByRole("button")).toBeNull();
+    },
+  );
+});

apps/client/src/components/ui/ai-agent-badge.tsx

@@ -0,0 +1,99 @@
+import { Badge, Tooltip } from "@mantine/core";
+import { IconSparkles } from "@tabler/icons-react";
+import { useCallback } from "react";
+import { useTranslation } from "react-i18next";
+import { useSetAtom } from "jotai";
+import {
+  activeAiChatIdAtom,
+  aiChatWindowOpenAtom,
+  aiChatDraftAtom,
+} from "@/features/ai-chat/atoms/ai-chat-atom.ts";
+
+interface AiAgentBadgeProps {
+  authorName?: string;
+  aiChatId?: string | null;
+  // Fired after the badge deep-links into its chat. The caller handles its own
+  // context (e.g. the page-history row closes the history modal) so this generic
+  // ui/ primitive stays free of cross-feature coupling (#143 review Arch B).
+  onActivate?: () => void;
+}
+
+/**
+ * Badge marking content written by the AI agent (provenance C3 / §7.4). It is
+ * ADDITIVE — shown next to the human author, never replacing them. Reused by the
+ * page-history list and the comments sidebar.
+ *
+ * When the item carries an `aiChatId` (an internal AI-chat edit), clicking the
+ * badge deep-links into that chat: it sets the active-chat atom and opens the
+ * floating AI-chat window, then invokes `onActivate` so the caller can react
+ * (e.g. the history modal closes itself). When `aiChatId` is null/absent (an
+ * external MCP write with no internal ai_chats row), the badge is a plain
+ * non-clickable label. The click is contained (stopPropagation) so it does not
+ * also trigger an enclosing row's click handler.
+ */
+export function AiAgentBadge({
+  authorName,
+  aiChatId,
+  onActivate,
+}: AiAgentBadgeProps) {
+  const { t } = useTranslation();
+  const setAiChatWindowOpen = useSetAtom(aiChatWindowOpenAtom);
+  const setActiveChatId = useSetAtom(activeAiChatIdAtom);
+  const setDraft = useSetAtom(aiChatDraftAtom);
+
+  const tooltip = t("Edited by AI agent on behalf of {{name}}", {
+    name: authorName ?? "",
+  });
+
+  const openChat = useCallback(
+    (event: React.SyntheticEvent) => {
+      event.stopPropagation();
+      if (!aiChatId) return;
+      setActiveChatId(aiChatId);
+      // Switching to another chat must start with a clean composer — clear any
+      // unsent draft so it does not leak from the previously open chat.
+      setDraft("");
+      setAiChatWindowOpen(true);
+      onActivate?.();
+    },
+    [aiChatId, setActiveChatId, setDraft, setAiChatWindowOpen, onActivate],
+  );
+
+  const badge = (
+    <Badge
+      size="sm"
+      variant="light"
+      color="violet"
+      radius="sm"
+      leftSection={<IconSparkles size={12} stroke={2} />}
+      style={aiChatId ? { cursor: "pointer" } : undefined}
+      {...(aiChatId
+        ? {
+            // Keep the default Badge root element (not a <button>) to avoid an
+            // invalid <button>-in-<button> nesting inside a row's
+            // UnstyledButton; expose it as an accessible button via
+            // role/keyboard.
+            role: "button",
+            tabIndex: 0,
+            onClick: openChat,
+            onKeyDown: (event: React.KeyboardEvent) => {
+              if (event.key === "Enter" || event.key === " ") {
+                event.preventDefault();
+                openChat(event);
+              }
+            },
+          }
+        : {})}
+    >
+      {t("AI-agent")}
+    </Badge>
+  );
+
+  return (
+    <Tooltip label={tooltip} withArrow>
+      {badge}
+    </Tooltip>
+  );
+}
+
+export default AiAgentBadge;

apps/client/src/features/ai-chat/atoms/ai-chat-atom.ts

@@ -1,4 +1,22 @@
 import { atom } from "jotai";
+import { atomWithStorage } from "jotai/utils";
+
+/**
+ * Persisted floating AI chat window geometry (position + size). Held in
+ * localStorage so a drag/resize survives a full page reload. `null` means
+ * "never placed yet" — the window then computes an initial top-right placement.
+ * On restore the value is clamped to the current viewport (see AiChatWindow).
+ */
+export type AiChatWindowGeom = {
+  left: number;
+  top: number;
+  width: number;
+  height: number;
+};
+export const aiChatWindowGeomAtom = atomWithStorage<AiChatWindowGeom | null>(
+  "ai-chat-window-geom",
+  null,
+);
 
 /**
  * The currently selected chat id. `null` means a fresh (not-yet-created) chat:

apps/client/src/features/ai-chat/components/ai-chat-window.tsx

@@ -6,7 +6,6 @@ import {
   useRef,
   useState,
 } from "react";
-import { generateId } from "ai";
 import { Group, Loader, Tooltip } from "@mantine/core";
 import {
   IconArrowsDiagonal,
@@ -25,6 +24,7 @@ import { useQueryClient } from "@tanstack/react-query";
 import {
   activeAiChatIdAtom,
   aiChatWindowOpenAtom,
+  aiChatWindowGeomAtom,
   aiChatDraftAtom,
   selectedAiRoleIdAtom,
 } from "@/features/ai-chat/atoms/ai-chat-atom.ts";
@@ -39,7 +39,8 @@ import {
 } from "@/features/ai-chat/queries/ai-chat-query.ts";
 import ConversationList from "@/features/ai-chat/components/conversation-list.tsx";
 import ChatThread from "@/features/ai-chat/components/chat-thread.tsx";
-import { buildChatMarkdown } from "@/features/ai-chat/utils/chat-markdown.ts";
+import { exportAiChat } from "@/features/ai-chat/services/ai-chat-service.ts";
+import { useChatSession } from "@/features/ai-chat/hooks/use-chat-session.ts";
 import {
   shouldCollapseOnOutsidePointer,
   isHeaderClick,
@@ -78,17 +79,31 @@ function computeInitialGeom() {
     Math.min(DEFAULT_HEIGHT, window.innerHeight - 2 * EDGE_MARGIN),
   );
   const left = Math.max(EDGE_MARGIN, window.innerWidth - width - 24);
-  const maxTop = Math.max(EDGE_MARGIN, window.innerHeight - height - EDGE_MARGIN);
+  const maxTop = Math.max(
+    EDGE_MARGIN,
+    window.innerHeight - height - EDGE_MARGIN,
+  );
   const top = Math.min(60, maxTop);
   return { left, top, width, height };
 }
 
 // Clamp a geometry so the window stays within the current viewport.
-function clampGeom(g: { left: number; top: number; width: number; height: number }) {
+function clampGeom(g: {
+  left: number;
+  top: number;
+  width: number;
+  height: number;
+}) {
   const effWidth = Math.max(g.width, MIN_WIDTH);
   const effHeight = Math.max(g.height, MIN_HEIGHT);
-  const maxLeft = Math.max(EDGE_MARGIN, window.innerWidth - effWidth - EDGE_MARGIN);
-  const maxTop = Math.max(EDGE_MARGIN, window.innerHeight - effHeight - EDGE_MARGIN);
+  const maxLeft = Math.max(
+    EDGE_MARGIN,
+    window.innerWidth - effWidth - EDGE_MARGIN,
+  );
+  const maxTop = Math.max(
+    EDGE_MARGIN,
+    window.innerHeight - effHeight - EDGE_MARGIN,
+  );
   return {
     ...g,
     left: Math.min(Math.max(EDGE_MARGIN, g.left), maxLeft),
@@ -99,12 +114,13 @@ function clampGeom(g: { left: number; top: number; width: number; height: number
 /**
  * Floating, draggable, resizable, minimizable AI chat window. Replaces the
  * former right-aside `AiChatPanel`: it owns ALL chat orchestration (active
- * chat, new chat, adopt-new-chat, open-page context, token sum) and wraps the
+ * chat, new chat, in-place id adoption from streamed metadata, open-page
+ * context, token sum) and wraps the
  * reused inner components (ConversationList + ChatThread) in window chrome
  * ported from the GitmostAgent.jsx design.
  */
 export default function AiChatWindow() {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
   const clipboard = useClipboard({ timeout: 500 });
   const queryClient = useQueryClient();
   const [windowOpen, setWindowOpen] = useAtom(aiChatWindowOpenAtom);
@@ -122,39 +138,13 @@ export default function AiChatWindow() {
   minimizedRef.current = minimized;
 
   const winRef = useRef<HTMLDivElement>(null);
-  // Live window geometry (position + size); initialized lazily on first open so
-  // it is anchored to the current viewport (top-right corner). Kept in state so
-  // a user resize survives close/reopen and can be re-clamped to the viewport.
-  const [geom, setGeom] = useState<{
-    left: number;
-    top: number;
-    width: number;
-    height: number;
-  } | null>(null);
-
-  // Track whether we are awaiting the id of a just-created (new) chat, so we
-  // can adopt it once the chat list refreshes after the first turn finishes.
-  const adoptNewChat = useRef(false);
-
-  // Latch: the chat id whose full persisted history has finished loading while
-  // its thread is mounted. Used so a later BACKGROUND refetch (the post-turn
-  // messages invalidation) never tears the live thread back down to the loader.
-  const historyLoadedKeyRef = useRef<string | null>(null);
-
-  // Mount key for ChatThread + the chat the currently-mounted thread represents.
-  // `threadKey` normally tracks the active chat, so selecting a different chat
-  // (incl. from page history) remounts and re-seeds. The ONE exception is
-  // in-place adoption of a brand-new chat's server id: the adopt effect moves
-  // `liveThreadChatId` to the new id TOGETHER with `activeChatId`, so the switch
-  // check below does not fire and the SAME thread stays mounted (its useChat
-  // already holds the just-finished turn) instead of being re-seeded from
-  // not-yet-persisted history.
-  const [threadKey, setThreadKey] = useState<string>(
-    () => activeChatId ?? `new-${generateId()}`,
-  );
-  const [liveThreadChatId, setLiveThreadChatId] = useState<string | null>(
-    activeChatId,
-  );
+  // Live window geometry (position + size); persisted to localStorage so a
+  // drag/resize survives a full page reload (and close/reopen). `null` means
+  // "never placed yet" — the layout effect below then computes an initial
+  // top-right placement anchored to the current viewport, and on restore it is
+  // re-clamped to the viewport (so a placement saved on a larger screen is not
+  // left partly off-screen).
+  const [geom, setGeom] = useAtom(aiChatWindowGeomAtom);
 
   const { data: chats } = useAiChatsQuery();
   // Roles for the new-chat picker (any member may list them). Only fetched while
@@ -171,6 +161,12 @@ export default function AiChatWindow() {
   const { data: messageRows, isLoading: messagesLoading } =
     useAiChatMessagesQuery(activeChatId ?? undefined);
 
+  // Live turn-token total (reasoning + output) for the in-flight turn, pushed up
+  // (THROTTLED to ~8 Hz inside ChatThread) so the header badge ticks mid-stream.
+  // `null` means no turn is in flight -> the badge falls back to the persisted
+  // context size below.
+  const [liveTurnTokens, setLiveTurnTokens] = useState<number | null>(null);
+
   // The page the user is currently viewing. AiChatWindow lives in a pathless
   // parent layout route, so useParams() can't see :pageSlug. Match the full
   // pathname against the authenticated page route instead so "the current page"
@@ -188,21 +184,56 @@ export default function AiChatWindow() {
     ? { id: openPageData.id, title: openPageData.title }
     : null;
 
+  // The AI-chat thread-identity lifecycle (mount key, both new-chat id adoption
+  // paths, the history-loaded latch, the render-phase reconciler) lives in this
+  // hook. See adopt-chat-id.ts for the canonical #137 two-tab race explanation.
+  // The invalidate closures are passed inline: `onTurnFinished` is read live by
+  // useChat's onFinish (never in an effect dep array), so their identity does not
+  // matter — no memoization ceremony needed.
+  const {
+    threadKey,
+    waitingForHistory,
+    onTurnFinished,
+    onServerChatId,
+    startFreshThread,
+    cancelPendingAdoption,
+  } = useChatSession({
+    activeChatId,
+    setActiveChatId,
+    chats,
+    messagesLoading,
+    onInvalidateChatList: () =>
+      queryClient.invalidateQueries({ queryKey: AI_CHATS_RQ_KEY }),
+    onInvalidateChatMessages: (id) =>
+      queryClient.invalidateQueries({ queryKey: AI_CHAT_MESSAGES_RQ_KEY(id) }),
+  });
+
+  // startNewChat/selectChat set the public atom; the hook's render-phase
+  // reconciler handles the remount when activeChatId actually CHANGES. But
+  // pressing "New chat" while already in a not-yet-adopted new chat leaves
+  // activeChatId === null (a no-op for the atom), so the reconciler never fires —
+  // startFreshThread forces the remount unconditionally (and disarms any armed
+  // error-path fallback) so a late refetch can't yank the user into a just-failed
+  // chat after they chose a fresh one (#161).
   const startNewChat = useCallback((): void => {
-    // Cancel any pending adoption so a just-finished new chat can't yank the user
-    // back here after they explicitly started a fresh one.
-    adoptNewChat.current = false;
+    // Force a fresh thread UNCONDITIONALLY. On a brand-new, not-yet-adopted chat
+    // (activeChatId === null) whose first turn is still streaming, setActiveChatId
+    // (null) is a no-op and the render-phase reconciler would not remount — leaving
+    // the streaming thread in place (#161). startFreshThread guarantees a clean
+    // remount and already disarms any armed error-path fallback (so a separate
+    // cancelPendingAdoption() call here is redundant); the abandoned thread's late
+    // finish is rejected by the threadKey guard in the session hook.
+    startFreshThread();
     setActiveChatId(null);
     setHistoryOpen(false);
     setDraft("");
     // Default the picker back to "Universal assistant" for the fresh chat.
     setSelectedRoleId(null);
-  }, [setActiveChatId, setDraft, setSelectedRoleId]);
+  }, [startFreshThread, setActiveChatId, setDraft, setSelectedRoleId]);
 
   const selectChat = useCallback(
     (chatId: string): void => {
-      // Cancel any pending adoption so it can't override an explicit selection.
-      adoptNewChat.current = false;
+      cancelPendingAdoption();
       setActiveChatId(chatId);
       setHistoryOpen(false);
       setDraft("");
@@ -210,43 +241,31 @@ export default function AiChatWindow() {
       // chat's header/assistant-name (which prefers the chat's persisted role).
       setSelectedRoleId(null);
     },
-    [setActiveChatId, setDraft, setSelectedRoleId],
+    [cancelPendingAdoption, setActiveChatId, setDraft, setSelectedRoleId],
   );
 
-  // After a turn finishes, refresh the chat list. For a brand-new chat (no id
-  // yet), the server has just created the row; adopt the newest chat id so the
-  // thread switches from "new" to the persisted chat (and loads its history on
-  // later opens).
-  const onTurnFinished = useCallback(() => {
-    if (activeChatId === null) adoptNewChat.current = true;
-    queryClient.invalidateQueries({ queryKey: AI_CHATS_RQ_KEY });
-    // Re-sync the persisted message rows for the active chat so the Markdown
-    // export and the token counters reflect the turn that just finished. The
-    // live thread renders from its own useChat store (stable threadKey / store
-    // id), so refetching these rows never re-seeds or tears down the open
-    // thread. For a brand-new chat activeChatId is still null here; that chat's
-    // first row load happens right after id adoption, and every later turn hits
-    // this invalidation with the adopted id.
-    if (activeChatId) {
-      queryClient.invalidateQueries({
-        queryKey: AI_CHAT_MESSAGES_RQ_KEY(activeChatId),
-      });
-    }
-  }, [activeChatId, queryClient]);
-
-  // The active chat object (for its title) and an export gate: only enable the
-  // export button when an existing chat with loaded persisted rows is active.
+  // The active chat object (for its title) and an export gate. The export is now
+  // SERVER-sourced (the DB is the single source of truth — #183): the assistant
+  // row is persisted upfront + per step, so even a brand-new chat whose first
+  // turn is streaming/interrupted has a server row to render. Enable the button
+  // whenever a persisted chat is active (`activeChatId` is set). For a BRAND-NEW
+  // chat that id is adopted EARLY — at the stream's `start` chunk via
+  // onServerChatId (#174) — so the Copy button is available during the first
+  // turn's stream, not only after it terminates.
   const activeChat = useMemo(
     () => chats?.items?.find((c) => c.id === activeChatId) ?? null,
     [chats, activeChatId],
   );
-  const canExport = !!activeChatId && !!messageRows && messageRows.length > 0;
+  const canExport = !!activeChatId;
 
   // The role to display in the header and as the assistant's name. Prefer the
   // persisted role of an existing chat (chat-list JOIN); fall back to the role
   // picked via a card click for a brand-new or just-adopted chat. selectChat
   // resets selectedRoleId, so this fallback never leaks into an unrelated chat.
-  const currentRole = useMemo<{ name: string; emoji: string | null } | null>(() => {
+  const currentRole = useMemo<{
+    name: string;
+    emoji: string | null;
+  } | null>(() => {
     if (activeChat?.roleName) {
       return { name: activeChat.roleName, emoji: activeChat.roleEmoji ?? null };
     }
@@ -254,76 +273,21 @@ export default function AiChatWindow() {
     return picked ? { name: picked.name, emoji: picked.emoji } : null;
   }, [activeChat, enabledRoles, selectedRoleId]);
 
-  // Build a Markdown export from the already-loaded persisted rows (no network
-  // call) and copy it to the clipboard. The "Copied" notification is the
-  // feedback.
-  const handleCopy = useCallback(() => {
-    if (!activeChatId || !messageRows || messageRows.length === 0) return;
-    const markdown = buildChatMarkdown({
-      title: activeChat?.title ?? null,
-      chatId: activeChatId,
-      rows: messageRows,
-      t,
-    });
-    clipboard.copy(markdown);
-    notifications.show({ message: t("Copied") });
-  }, [activeChatId, messageRows, activeChat, clipboard, t]);
-
-  // When awaiting a new chat's id, adopt the most-recent chat (the list is
-  // ordered newest-first) once it appears.
-  useEffect(() => {
-    if (!adoptNewChat.current) return;
-    const newest = chats?.items?.[0];
-    if (newest) {
-      adoptNewChat.current = false;
-      // In-place adoption: move the active chat AND the live-thread marker to the
-      // new id together, so the threadKey derivation below sees no "switch" and
-      // keeps the SAME mounted thread (its useChat already holds the finished
-      // turn) instead of remounting and re-seeding from not-yet-persisted history.
-      // ASSUMPTION: these two updates (jotai atom + useState) must land in ONE
-      // render so the render-phase guard never observes the new activeChatId with
-      // a stale liveThreadChatId (which would wrongly remount). React 18 automatic
-      // batching inside this effect callback guarantees that; if the store/atom
-      // mechanism ever changes, gate adoption on an explicit flag instead.
-      setLiveThreadChatId(newest.id);
-      setActiveChatId(newest.id);
+  // Fetch the server-rendered Markdown export and copy it to the clipboard. The
+  // server is the single source of truth (#183): it renders the transcript from
+  // the persisted rows — including an interrupted turn's in-progress row — so the
+  // export is identical whether the chat is freshly streaming, just switched to,
+  // or reloaded. The `lang` of the active i18n drives the few localized labels.
+  const handleCopy = useCallback(async () => {
+    if (!activeChatId) return;
+    try {
+      const markdown = await exportAiChat(activeChatId, i18n.language);
+      clipboard.copy(markdown);
+      notifications.show({ message: t("Copied") });
+    } catch {
+      notifications.show({ message: t("Failed to export chat"), color: "red" });
     }
-  }, [chats, setActiveChatId]);
-
-  // Adjust the derived thread state during render when the active chat genuinely
-  // changes — the React-sanctioned alternative to an effect (it re-renders before
-  // paint, no extra commit, and converges since the next render finds them equal).
-  // In-place adoption of a new chat's id never reaches here because the adopt
-  // effect moves liveThreadChatId in lockstep with activeChatId.
-  if (activeChatId !== liveThreadChatId) {
-    setLiveThreadChatId(activeChatId);
-    setThreadKey(activeChatId ?? `new-${generateId()}`);
-  }
-  // Latch the active chat once its full history has loaded and its thread is
-  // mounted, so a later background refetch (the post-turn messages
-  // invalidation, which can transiently flip hasNextPage for a chat whose
-  // message count is an exact multiple of the server page size) does not tear
-  // the live thread down to a loader and lose its in-progress useChat state.
-  if (
-    activeChatId !== null &&
-    threadKey === activeChatId &&
-    !messagesLoading &&
-    historyLoadedKeyRef.current !== activeChatId
-  ) {
-    historyLoadedKeyRef.current = activeChatId;
-  }
-
-  // Show the history loader only when freshly OPENING an existing chat (the key
-  // equals the chat id) whose history has not been fully loaded yet. For a live
-  // in-place thread that adopted its id, the key is still the "new-…" session
-  // key, so we keep showing the live thread instead of unmounting it behind a
-  // loader; and once a chat's history has loaded, a later background refetch no
-  // longer tears the thread back down (see the latch above).
-  const waitingForHistory =
-    activeChatId !== null &&
-    messagesLoading &&
-    threadKey === activeChatId &&
-    historyLoadedKeyRef.current !== activeChatId;
+  }, [activeChatId, clipboard, t, i18n.language]);
 
   // Current context size for the active chat: how much the conversation now
   // occupies in the model's context window — NOT the cumulative tokens spent.
@@ -390,18 +354,23 @@ export default function AiChatWindow() {
   useEffect(() => {
     if (!windowOpen || minimized) return;
     const el = winRef.current;
+    // `geom` is in the deps so this re-runs once geometry is settled and the
+    // window is actually rendered (on the first open `geom` is still null on the
+    // render that flips windowOpen, so winRef.current is null then — without the
+    // geom dep the observer would never attach and resizes would not persist).
     if (!el) return;
     const ro = new ResizeObserver(() => {
       const width = el.offsetWidth;
       const height = el.offsetHeight;
       setGeom((prev) => {
-        if (!prev || (prev.width === width && prev.height === height)) return prev;
+        if (!prev || (prev.width === width && prev.height === height))
+          return prev;
         return { ...prev, width, height };
       });
     });
     ro.observe(el);
     return () => ro.disconnect();
-  }, [windowOpen, minimized]);
+  }, [windowOpen, minimized, geom !== null]);
 
   const startDrag = useCallback((e: React.MouseEvent): void => {
     // Ignore drags that originate on a button (minimize/close/new chat).
@@ -535,11 +504,23 @@ export default function AiChatWindow() {
         )}
 
         <div style={{ flex: 1, display: "flex", justifyContent: "center" }}>
-          {contextTokens > 0 && (
-            <Tooltip label={t("Current context size")} withArrow>
-              <span className={classes.badge}>{formatTokens(contextTokens)}</span>
+          {/* While a turn streams, show the LIVE turn-token count (ticks ~8 Hz);
+              once it finishes, fall back to the persisted context size. Require
+              > 0 so the very first emit (an empty tail message, count 0) does not
+              flash a "0" badge before any token streams in (#151 review). */}
+          {liveTurnTokens !== null && liveTurnTokens > 0 ? (
+            <Tooltip label={t("Tokens generated this turn")} withArrow>
+              <span className={classes.badge}>
+                {formatTokens(liveTurnTokens)}
+              </span>
             </Tooltip>
-          )}
+          ) : contextTokens > 0 ? (
+            <Tooltip label={t("Current context size")} withArrow>
+              <span className={classes.badge}>
+                {formatTokens(contextTokens)}
+              </span>
+            </Tooltip>
+          ) : null}
         </div>
 
         <div style={{ display: "flex", alignItems: "center", gap: 1 }}>
@@ -551,7 +532,11 @@ export default function AiChatWindow() {
               aria-label={t("Copy chat")}
               onClick={handleCopy}
             >
-              {clipboard.copied ? <IconCheck size={14} /> : <IconCopy size={14} />}
+              {clipboard.copied ? (
+                <IconCheck size={14} />
+              ) : (
+                <IconCopy size={14} />
+              )}
             </button>
           )}
           <button
@@ -657,6 +642,9 @@ export default function AiChatWindow() {
               onRolePicked={(role) => setSelectedRoleId(role.id)}
               assistantName={currentRole?.name}
               onTurnFinished={onTurnFinished}
+              threadKey={threadKey}
+              onServerChatId={onServerChatId}
+              onLiveTurnTokens={setLiveTurnTokens}
             />
           )}
         </div>

apps/client/src/features/ai-chat/components/ai-chat.module.css

@@ -55,6 +55,45 @@
     padding-inline-start: 1.4em;
 }
 
+/* GFM tables in assistant markdown. The chat lives in a NARROW side panel, so a
+   wide LLM table must scroll horizontally instead of collapsing its columns:
+   `.markdown` sets `word-break: break-word`, which (with the default table
+   layout) shrinks columns to a single glyph and wraps headers mid-word
+   ("Секция" -> "Секци / я"). Make the table a horizontally scrollable block,
+   give cells a readable minimum width, and restore word-boundary wrapping. */
+.markdown table {
+    display: block;
+    /* lets the table scroll horizontally on its own */
+    max-width: 100%;
+    overflow-x: auto;
+    border-collapse: collapse;
+    margin-block-end: 0.5em;
+}
+
+.markdown th,
+.markdown td {
+    border: 1px solid light-dark(var(--mantine-color-gray-3), var(--mantine-color-dark-4));
+    padding: 3px 8px;
+    /* readable floor; the block scrolls when the row exceeds the panel */
+    min-width: 6em;
+    text-align: left;
+    vertical-align: top;
+    /* cancel the inherited break-word so words don't split mid-glyph */
+    word-break: normal;
+    /* still wrap genuinely long words / URLs at the cell edge */
+    overflow-wrap: break-word;
+}
+
+.markdown th {
+    background: light-dark(var(--mantine-color-gray-1), var(--mantine-color-dark-5));
+    font-weight: 600;
+}
+
+/* GFM wraps cell text in <p>; drop its default block margin inside cells. */
+.markdown table p {
+    margin: 0;
+}
+
 /* Animated three-dot "typing" indicator shown while the agent is thinking but
    has not yet produced any visible text/tool parts. */
 .typingDots {
@@ -111,6 +150,28 @@
     background: light-dark(var(--mantine-color-gray-0), var(--mantine-color-dark-6));
 }
 
+/* Collapsible "Thinking" (reasoning) block: a subtle left rule, dimmer than the
+   answer so it reads as secondary thinking context above the real answer. */
+.reasoningBlock {
+    border-left: 2px solid light-dark(var(--mantine-color-gray-3), var(--mantine-color-dark-4));
+    padding-left: 8px;
+}
+
+.reasoningText {
+    margin-top: 4px;
+    font-size: var(--mantine-font-size-xs);
+    color: light-dark(var(--mantine-color-gray-7), var(--mantine-color-dark-1));
+    /* NOTE: `white-space: pre-wrap` is intentionally NOT set here. On the
+       rendered markdown <div> it would turn the newlines between block tags
+       (</li>\n<li>, </p>\n<ol>) into visible blank lines/indents on top of the
+       margins. The plain-text fallback <Text> that needs pre-wrap sets it
+       inline itself (see reasoning-block.tsx). */
+}
+
+.reasoningText p {
+    margin: 0 0 4px;
+}
+
 .inputWrapper {
     flex: 0 0 auto;
     padding-top: var(--mantine-spacing-xs);

apps/client/src/features/ai-chat/components/chat-error-alert.tsx

@@ -0,0 +1,49 @@
+import { Alert, Group, Text, type AlertProps } from "@mantine/core";
+import { IconAlertTriangle } from "@tabler/icons-react";
+
+/**
+ * A classified AI chat error banner: a warning icon + bold heading on the first
+ * row, with the detail text spanning the full width below. Rendered for BOTH the
+ * live stream error (ChatThread) and a persisted assistant error (MessageItem),
+ * so this markup lives in one place. The detail is full-width (no hanging indent
+ * under the heading) so it wraps less and leaves no stranded icon / empty gap.
+ * The heading reuses Mantine's adaptive red "light" colour so it stays correct
+ * in dark mode. Layout-only props (mb/mt/...) are forwarded to the Alert root.
+ */
+interface ChatErrorAlertProps extends Omit<AlertProps, "title" | "children"> {
+  title: string;
+  detail: string;
+}
+
+export default function ChatErrorAlert({
+  title,
+  detail,
+  style,
+  ...alertProps
+}: ChatErrorAlertProps) {
+  // Mantine's own "light" alert colour, adaptive across light/dark schemes.
+  const accent = "var(--mantine-color-red-light-color)";
+  return (
+    // flexShrink: 0 keeps the banner fully visible. Mantine's Alert root is
+    // `overflow: hidden`, so as a flex child of the chat panel it can otherwise
+    // be compressed below its content height and clip the detail text; the
+    // scrollable message list absorbs the height pressure instead.
+    <Alert
+      {...alertProps}
+      variant="light"
+      color="red"
+      p="xs"
+      style={[{ flexShrink: 0 }, style]}
+    >
+      <Group gap={8} wrap="nowrap" align="center" mb={4}>
+        <IconAlertTriangle size={18} style={{ flex: "none", color: accent }} />
+        <Text fw={700} size="sm" lh={1.2} style={{ color: accent }}>
+          {title}
+        </Text>
+      </Group>
+      <Text size="sm" lh={1.4}>
+        {detail}
+      </Text>
+    </Alert>
+  );
+}

apps/client/src/features/ai-chat/components/chat-input.tsx

@@ -35,6 +35,10 @@ export default function ChatInput({
   const [value, setValue] = useAtom(aiChatDraftAtom);
   const workspace = useAtomValue(workspaceAtom);
   const isDictationEnabled = workspace?.settings?.ai?.dictation === true;
+  // Streaming (silence-cut) dictation is opt-in per workspace; absent/false
+  // keeps the stable batch path.
+  const streamingDictation =
+    workspace?.settings?.ai?.dictationStreaming === true;
 
   const submit = (): void => {
     const text = value.trim();
@@ -71,7 +75,7 @@ export default function ChatInput({
       {isDictationEnabled && (
         <MicButton
           size="lg"
-          streaming
+          streaming={streamingDictation}
           disabled={isStreaming || disabled}
           onText={(text) => setValue((v) => (v ? `${v} ${text}` : text))}
         />

apps/client/src/features/ai-chat/components/chat-stopped-notice.tsx

@@ -0,0 +1,41 @@
+import { Alert, Group, Text, type AlertProps } from "@mantine/core";
+import { IconPlayerStopFilled } from "@tabler/icons-react";
+
+/**
+ * A neutral "turn was interrupted" notice (NOT an error). Rendered for an
+ * aborted turn — a manual Stop or a dropped connection — both live (ChatThread)
+ * and in reopened history (MessageItem). Deliberately gray/subtle so it reads as
+ * an informational marker, distinct from the red ChatErrorAlert. Layout-only
+ * props (mt/mb/...) are forwarded to the Alert root.
+ */
+interface ChatStoppedNoticeProps extends Omit<AlertProps, "title" | "children"> {
+  text: string;
+}
+
+export default function ChatStoppedNotice({
+  text,
+  style,
+  ...alertProps
+}: ChatStoppedNoticeProps) {
+  return (
+    <Alert
+      {...alertProps}
+      variant="light"
+      color="gray"
+      p="xs"
+      // flexShrink: 0 mirrors ChatErrorAlert so the notice is not compressed as a
+      // flex child of the chat panel.
+      style={[{ flexShrink: 0 }, style]}
+    >
+      <Group gap={8} wrap="nowrap" align="center">
+        <IconPlayerStopFilled
+          size={16}
+          style={{ flex: "none", color: "var(--mantine-color-dimmed)" }}
+        />
+        <Text size="sm" lh={1.3} c="dimmed">
+          {text}
+        </Text>
+      </Group>
+    </Alert>
+  );
+}

apps/client/src/features/ai-chat/components/chat-thread.test.tsx

@@ -0,0 +1,94 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { render, act } from "@testing-library/react";
+import { MantineProvider } from "@mantine/core";
+
+// Capture the options ChatThread passes to useChat so the test can drive the
+// hook's terminal callbacks (here: onError) directly, without a real stream. The
+// box is created via vi.hoisted so the hoisted vi.mock factory below can close
+// over it.
+const { useChatBox } = vi.hoisted(() => ({
+  useChatBox: { options: null as unknown as Record<string, unknown> | null },
+}));
+
+// Mock the AI SDK hook: record the options and return an inert, ready store so
+// ChatThread renders without any network/streaming machinery.
+vi.mock("@ai-sdk/react", () => ({
+  useChat: (options: Record<string, unknown>) => {
+    useChatBox.options = options;
+    return {
+      messages: [],
+      sendMessage: vi.fn(),
+      status: "ready",
+      stop: vi.fn(),
+      error: null,
+    };
+  },
+}));
+
+// Stub react-i18next so `t` returns the key (other component tests use the same
+// pattern); ChatThread's rendered chrome is irrelevant to this wiring test.
+vi.mock("react-i18next", () => ({
+  useTranslation: () => ({ t: (key: string) => key }),
+}));
+
+// Mock the heavy presentational children to trivial stubs — this test only
+// exercises the onError → onTurnFinished wiring, not their rendering.
+vi.mock("@/features/ai-chat/components/message-list.tsx", () => ({
+  default: () => null,
+}));
+vi.mock("@/features/ai-chat/components/chat-input.tsx", () => ({
+  default: () => null,
+}));
+vi.mock("@/features/ai-chat/components/role-cards.tsx", () => ({
+  default: () => null,
+}));
+vi.mock("@/features/ai-chat/components/chat-error-alert.tsx", () => ({
+  default: () => null,
+}));
+vi.mock("@/features/ai-chat/components/chat-stopped-notice.tsx", () => ({
+  default: () => null,
+}));
+
+import ChatThread from "./chat-thread";
+
+// matchMedia (read by MantineProvider) is stubbed globally in vitest.setup.ts.
+
+describe("ChatThread onError wiring (#161)", () => {
+  beforeEach(() => {
+    useChatBox.options = null;
+    vi.clearAllMocks();
+  });
+
+  it("onError calls onTurnFinished with (undefined, threadKey) so a late error from an abandoned thread is rejected", () => {
+    const onTurnFinished = vi.fn();
+    // Silence the deliberate console.error ChatThread logs for devtools.
+    const consoleError = vi
+      .spyOn(console, "error")
+      .mockImplementation(() => {});
+
+    render(
+      <MantineProvider>
+        <ChatThread
+          chatId="c1"
+          onTurnFinished={onTurnFinished}
+          threadKey="thread-key-1"
+        />
+      </MantineProvider>,
+    );
+
+    const options = useChatBox.options;
+    expect(options).not.toBeNull();
+    expect(typeof options?.onError).toBe("function");
+
+    // Drive the captured onError exactly as the AI SDK would on a stream error.
+    act(() => {
+      (options!.onError as (e: Error) => void)(new Error("stream blew up"));
+    });
+
+    // The thread's own mount key must be forwarded with NO server id, so the
+    // session hook can reject this finish if the thread has been abandoned.
+    expect(onTurnFinished).toHaveBeenCalledWith(undefined, "thread-key-1");
+
+    consoleError.mockRestore();
+  });
+});

apps/client/src/features/ai-chat/components/chat-thread.tsx

@@ -1,18 +1,26 @@
-import { useCallback, useMemo, useRef, useState } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { generateId } from "ai";
-import { ActionIcon, Alert, Box, Group, Stack, Text } from "@mantine/core";
-import { IconAlertTriangle, IconClockHour4, IconX } from "@tabler/icons-react";
+import { ActionIcon, Box, Group, Stack, Text } from "@mantine/core";
+import { IconClockHour4, IconX } from "@tabler/icons-react";
 import { useTranslation } from "react-i18next";
 import { useChat, type UIMessage } from "@ai-sdk/react";
 import { DefaultChatTransport } from "ai";
 import MessageList from "@/features/ai-chat/components/message-list.tsx";
 import ChatInput from "@/features/ai-chat/components/chat-input.tsx";
 import RoleCards from "@/features/ai-chat/components/role-cards.tsx";
+import ChatErrorAlert from "@/features/ai-chat/components/chat-error-alert.tsx";
+import ChatStoppedNotice from "@/features/ai-chat/components/chat-stopped-notice.tsx";
 import {
   IAiChatMessageRow,
   IAiRole,
 } from "@/features/ai-chat/types/ai-chat.types.ts";
+import {
+  roleLaunchMessage,
+  shouldResetRolePicked,
+} from "@/features/ai-chat/utils/role-launch.ts";
 import { describeChatError } from "@/features/ai-chat/utils/error-message.ts";
+import { extractServerChatId } from "@/features/ai-chat/utils/adopt-chat-id.ts";
+import { liveTurnTokens } from "@/features/ai-chat/utils/count-stream-tokens.ts";
 import {
   dequeue,
   enqueueMessage,
@@ -48,9 +56,28 @@ interface ChatThreadProps {
   /** Display name for the assistant label / typing line (the role name);
    *  forwarded to MessageList. Absent => the generic "AI agent". */
   assistantName?: string;
-  /** Called when a turn finishes; the parent refreshes the chat list and, for
-   *  a new chat, adopts the freshly created chat id. */
-  onTurnFinished: () => void;
+  /** Called when a turn finishes; the parent refreshes the chat list and, for a
+   *  new chat, adopts the freshly created chat id. `serverChatId` is the
+   *  authoritative id the server streamed on the assistant message metadata, or
+   *  undefined on a failed turn — see adopt-chat-id.ts for the full #137 design. */
+  onTurnFinished: (serverChatId?: string, finishingThreadKey?: string) => void;
+  /** This thread's mount key (the same value the parent uses as React `key`).
+   *  Forwarded back through onTurnFinished so the session hook can tell a finish
+   *  from THIS still-mounted thread from a late finish of an abandoned thread the
+   *  user already left via New chat / switch (#161). */
+  threadKey?: string;
+  /** Called EARLY (at the stream's `start` chunk) with the authoritative server
+   *  chat id streamed on the assistant message metadata, so a brand-new chat
+   *  adopts its real id WHILE the first turn is still streaming (#174 — makes the
+   *  Copy/export button available mid-stream). Distinct from onTurnFinished,
+   *  which fires only at the terminal outcome. */
+  onServerChatId?: (serverChatId?: string) => void;
+  /** Reports the live turn-token total (reasoning + output) for the in-flight
+   *  turn so the parent can show a header badge that ticks mid-stream. THROTTLED
+   *  here (~8 Hz) so the parent re-renders a handful of times a second, not on
+   *  every streamed delta. Called with `null` when no turn is in flight (the
+   *  parent then reverts the badge to the persisted context size). */
+  onLiveTurnTokens?: (tokens: number | null) => void;
 }
 
 /**
@@ -65,13 +92,18 @@ function rowToUiMessage(row: IAiChatMessageRow): UIMessage {
       ? row.metadata.parts
       : ([{ type: "text", text: row.content ?? "" }] as UIMessage["parts"]);
   const error = row.metadata?.error;
+  const finishReason = row.metadata?.finishReason;
+  const metadata: Record<string, unknown> = {};
+  if (error) metadata.error = error;
+  if (finishReason) metadata.finishReason = finishReason;
   return {
     id: row.id,
     role,
     parts,
-    // Carry a persisted turn error so MessageItem can render it after a remount
-    // (e.g. when a new chat adopts its id) and in reopened chat history.
-    ...(error ? { metadata: { error } } : {}),
+    // Carry persisted turn outcome (error text and/or finishReason) so MessageItem
+    // can render the error banner / "stopped" marker after a remount and in
+    // reopened history.
+    ...(Object.keys(metadata).length > 0 ? { metadata } : {}),
   } as UIMessage;
 }
 
@@ -89,6 +121,9 @@ export default function ChatThread({
   onRolePicked,
   assistantName,
   onTurnFinished,
+  threadKey,
+  onServerChatId,
+  onLiveTurnTokens,
 }: ChatThreadProps) {
   const { t } = useTranslation();
 
@@ -225,44 +260,166 @@ export default function ChatThread({
     // sending after the user hit Stop — or blindly retrying after a failure —
     // would be wrong, so on Stop/disconnect/error the queue is left intact for
     // the user to decide.
-    onFinish: ({ isAbort, isDisconnect, isError }) => {
-      onTurnFinished();
+    onFinish: ({ message, isAbort, isDisconnect, isError }) => {
+      // Forward the authoritative server chatId (streamed on the assistant
+      // message metadata) so the parent adopts the REAL created chat id for a new
+      // chat — see adopt-chat-id.ts for the full #137 design.
+      onTurnFinished(extractServerChatId(message), threadKey);
+      // Show a neutral "stopped" marker for an aborted turn; the red error banner
+      // (via `error`) already covers isError, and a clean finish clears any marker.
+      if (isError) setStopNotice(null);
+      else if (isAbort) setStopNotice("manual");
+      else if (isDisconnect) setStopNotice("disconnect");
+      else setStopNotice(null);
       if (isAbort || isDisconnect || isError) return;
       flushNext();
     },
     // `onError` runs in addition to `onFinish` (which ai@6 also calls on error).
     // Log the raw failure here for devtools; the UI shows a friendly classified
-    // banner via `error` below. We still call `onTurnFinished()` (idempotent with
-    // the onFinish call) so a brand-new chat that fails its first turn is adopted
-    // and the chat list refreshes immediately rather than after a manual refresh.
+    // banner via `error` below. We still call `onTurnFinished()` with NO server id
+    // (idempotent with the onFinish call): for a brand-new chat that ARMS the
+    // bounded list-refetch fallback (adopt the single newly-appeared chat once the
+    // refetch lands); for an existing chat it just refreshes the chat list
+    // immediately rather than after a manual refresh.
     onError: (streamError) => {
       // Surface the raw failure in the browser console (devtools) for debugging;
       // the UI separately shows a friendly classified banner (see errorView).
       console.error("AI chat stream error:", streamError);
-      onTurnFinished();
+      onTurnFinished(undefined, threadKey);
     },
   });
 
   // Keep the flush helper pointed at the latest sendMessage instance.
   sendMessageRef.current = sendMessage;
 
+  // EARLY chat-id adoption (#174): the server streams the authoritative chat id
+  // on the assistant message metadata at the `start` chunk (message.metadata.
+  // chatId — see adopt-chat-id.ts / chatStreamMetadata). Forward it to the parent
+  // AS SOON AS it appears (mid-stream), so a brand-new chat adopts its real id
+  // WHILE the first turn is still streaming and activeChatId-gated affordances
+  // (the Copy/export button) light up immediately, instead of only at onFinish.
+  // Keyed by the last-seen id so we forward each distinct id exactly once. The
+  // parent's onServerChatId is idempotent and a no-op once the chat has an id.
+  const lastForwardedChatIdRef = useRef<string | undefined>(undefined);
+  useEffect(() => {
+    if (!onServerChatId) return;
+    const tail = messages[messages.length - 1];
+    if (tail?.role !== "assistant") return;
+    const serverChatId = extractServerChatId(tail);
+    if (!serverChatId || serverChatId === lastForwardedChatIdRef.current)
+      return;
+    lastForwardedChatIdRef.current = serverChatId;
+    onServerChatId(serverChatId);
+  }, [messages, onServerChatId]);
+
+  // Live "turn was interrupted" marker for the CURRENT session. The red error
+  // banner (driven by `error`) covers the error case; this covers an aborted
+  // turn, distinguishing a manual Stop (`isAbort`) from a dropped connection
+  // (`isDisconnect`) — a distinction only available live (the server persists
+  // both as finishReason 'aborted'). Cleared when the next turn starts.
+  const [stopNotice, setStopNotice] = useState<null | "manual" | "disconnect">(
+    null,
+  );
+
   const isStreaming = status === "submitted" || status === "streaming";
 
+  // Clear the stopped marker as soon as a new turn begins streaming.
+  useEffect(() => {
+    if (isStreaming) setStopNotice(null);
+  }, [isStreaming]);
+
   // Classify the turn error into a heading + detail so the banner names the cause
   // (connection reset, timeout, rate limit, context overflow, quota, ...) instead
-  // of a generic "Something went wrong".
+  // of a generic "Something went wrong". Computed here (not only in the JSX) so
+  // the SAME on-screen banner text can be mirrored into the export (issue #160).
   const errorView = error ? describeChatError(error.message ?? "", t) : null;
 
-  // Clicking a role card both binds the role to THIS new chat and immediately
-  // starts the conversation. roleIdRef is set synchronously here because the
-  // parent's selectedRoleId state update would only reach roleIdRef on the next
-  // render — after this synchronous sendMessage has already read it.
+  // Report the live turn-token total to the parent header badge, THROTTLED to
+  // ~8 Hz so the parent re-renders a few times a second instead of on every
+  // streamed delta. The tail assistant message's reasoning+output (estimate while
+  // streaming, authoritative once a step reports usage) is the live figure. When
+  // the turn ends we emit a final exact value, then `null` so the parent reverts
+  // the badge to the persisted context size.
+  const lastEmitRef = useRef(0);
+  const emitTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+  useEffect(() => {
+    if (!onLiveTurnTokens) return;
+    if (!isStreaming) {
+      // Turn ended (or never started): clear any pending throttle and revert.
+      if (emitTimerRef.current) {
+        clearTimeout(emitTimerRef.current);
+        emitTimerRef.current = null;
+      }
+      lastEmitRef.current = 0;
+      onLiveTurnTokens(null);
+      return;
+    }
+    const tail = messages[messages.length - 1];
+    const live = tail?.role === "assistant" ? liveTurnTokens(tail) : null;
+    const total = live ? live.reasoning + live.output : 0;
+    const now = Date.now();
+    const MIN_INTERVAL = 120; // ms (~8 Hz)
+    const elapsed = now - lastEmitRef.current;
+    if (elapsed >= MIN_INTERVAL) {
+      lastEmitRef.current = now;
+      onLiveTurnTokens(total);
+    } else if (!emitTimerRef.current) {
+      // Schedule a trailing emit so the FINAL value of a burst is not dropped.
+      emitTimerRef.current = setTimeout(() => {
+        emitTimerRef.current = null;
+        lastEmitRef.current = Date.now();
+        onLiveTurnTokens(total);
+      }, MIN_INTERVAL - elapsed);
+    }
+  }, [messages, isStreaming, onLiveTurnTokens]);
+
+  // Clear any pending throttle timer on unmount (chat switch via `key`) so a
+  // trailing emit can't fire into a torn-down thread's parent.
+  useEffect(() => {
+    return () => {
+      if (emitTimerRef.current) clearTimeout(emitTimerRef.current);
+    };
+  }, []);
+
+  // A role was picked with autoStart=false: the role is bound but NOTHING was
+  // sent, so chatId stays null and the empty state would keep showing the cards.
+  // This flag hides the cards and reveals the composer (with the role indicated)
+  // so the user can type the first message themselves. roleIdRef is already set,
+  // so that first manual message carries the roleId.
+  const [rolePickedNoSend, setRolePickedNoSend] = useState(false);
+
+  // Clicking a role card always binds the role to THIS new chat. Whether it also
+  // auto-starts the conversation is per-role (autoStart). roleIdRef is set
+  // synchronously here because the parent's selectedRoleId state update would
+  // only reach roleIdRef on the next render — after this synchronous sendMessage
+  // has already read it.
   const handleRolePick = (role: IAiRole): void => {
     roleIdRef.current = role.id;
     onRolePicked?.(role);
-    sendMessage({ text: t("Take a look at the current document") });
+    const launch = roleLaunchMessage(
+      role,
+      t("Take a look at the current document"),
+    );
+    if (launch !== null) {
+      sendMessage({ text: launch });
+    } else {
+      // autoStart=false -> bind only: hide the cards, show the composer.
+      setRolePickedNoSend(true);
+    }
   };
-  const showRoleCards = chatId === null && (roles?.length ?? 0) > 0;
+  // Reset the "picked, not sent" flag when the thread returns to a truly empty,
+  // role-less state — e.g. the user hit "New chat" after picking an autoStart=false
+  // role. That path clears the parent's selectedRoleId (roleId -> null) but leaves
+  // chatId null, so the thread never remounts and the flag would stay set, hiding
+  // the cards forever. A picked-and-bound role keeps roleId non-null, so the cards
+  // correctly stay hidden then. Render-phase reset (React "adjust state on prop
+  // change"): one-shot — it re-renders with the flag false and the guard no longer
+  // matches, so it cannot loop. (Review of #149.)
+  if (shouldResetRolePicked(chatId, roleId, rolePickedNoSend)) {
+    setRolePickedNoSend(false);
+  }
+  const showRoleCards =
+    chatId === null && (roles?.length ?? 0) > 0 && !rolePickedNoSend;
   const roleCardsEmptyState = showRoleCards ? (
     <RoleCards roles={roles ?? []} onPick={handleRolePick} />
   ) : undefined;
@@ -276,17 +433,22 @@ export default function ChatThread({
         assistantName={assistantName}
       />
 
-      {errorView && (
-        <Alert
-          variant="light"
-          color="red"
-          icon={<IconAlertTriangle size={16} />}
-          mb="xs"
+      {errorView ? (
+        <ChatErrorAlert
           title={errorView.title}
-        >
-          {errorView.detail}
-        </Alert>
-      )}
+          detail={errorView.detail}
+          mb="xs"
+        />
+      ) : stopNotice ? (
+        <ChatStoppedNotice
+          text={
+            stopNotice === "manual"
+              ? t("Response stopped.")
+              : t("Connection lost — the answer was interrupted.")
+          }
+          mb="xs"
+        />
+      ) : null}
 
       <Stack gap={0} className={classes.inputWrapper}>
         {queued.length > 0 && (

apps/client/src/features/ai-chat/components/message-item.tsx

@@ -1,11 +1,15 @@
-import { Alert, Box, Text } from "@mantine/core";
-import { IconAlertTriangle } from "@tabler/icons-react";
+import { Box, Text } from "@mantine/core";
 import { useTranslation } from "react-i18next";
 import type { UIMessage } from "@ai-sdk/react";
 import ToolCallCard from "@/features/ai-chat/components/tool-call-card.tsx";
+import ReasoningBlock from "@/features/ai-chat/components/reasoning-block.tsx";
+import ChatErrorAlert from "@/features/ai-chat/components/chat-error-alert.tsx";
+import ChatStoppedNotice from "@/features/ai-chat/components/chat-stopped-notice.tsx";
 import { ToolUiPart, isToolPart } from "@/features/ai-chat/utils/tool-parts.tsx";
+import { assistantMessageHasVisibleContent } from "@/features/ai-chat/utils/message-content.ts";
 import { renderChatMarkdown } from "@/features/ai-chat/utils/markdown.ts";
 import { resolveAssistantName } from "@/features/ai-chat/utils/assistant-name.ts";
+import { reasoningTokensForPart } from "@/features/ai-chat/utils/reasoning-tokens.ts";
 import { describeChatError } from "@/features/ai-chat/utils/error-message.ts";
 import classes from "@/features/ai-chat/components/ai-chat.module.css";
 
@@ -65,12 +69,41 @@ export default function MessageItem({
     );
   }
 
+  // An assistant message with nothing visible to render yet (an empty streaming
+  // text part, or a reasoning/step-start part while the model is still thinking)
+  // renders nothing here. The standalone TypingIndicator stands in for the nascent
+  // bubble (name + dots) until real content arrives, so exactly one element owns
+  // the agent name during the pre-content gap and the layout never jumps. Persisted
+  // errored/aborted turns DO have visible content per the helper (metadata.error /
+  // finishReason === "aborted"), so their banners below still render — this early
+  // return won't fire for them.
+  if (!assistantMessageHasVisibleContent(message)) return null;
+
+  // Authoritative reasoning token count to attribute to a reasoning block, or
+  // undefined when the block must estimate on its own. See reasoningTokensForPart
+  // for the #151 anti-double-count rule (only a single reasoning part may carry
+  // the turn total). The authoritative turn total is still surfaced live in the
+  // header badge regardless.
+  const reasoningTokens = reasoningTokensForPart(message);
+
   return (
     <Box className={classes.messageRow}>
       <Text size="xs" c="dimmed" mb={4}>
         {resolveAssistantName(assistantName) ?? t("AI agent")}
       </Text>
       {message.parts.map((part, index) => {
+        if (part.type === "reasoning") {
+          // Reasoning ("thinking") -> a collapsible block with its own token
+          // count. Empty/whitespace reasoning with no authoritative count carries
+          // nothing to show, so skip it (avoids an empty 0-token block).
+          const text = (part as { text?: string }).text ?? "";
+          if (!text.trim() && !(reasoningTokens && reasoningTokens > 0))
+            return null;
+          return (
+            <ReasoningBlock key={index} text={text} tokens={reasoningTokens} />
+          );
+        }
+
         if (part.type === "text") {
           // Skip empty/whitespace-only text parts (a streaming message often
           // starts with an empty text part before the first token arrives); the
@@ -118,15 +151,27 @@ export default function MessageItem({
         // cause plus a one-line detail.
         const errorView = describeChatError(errorText, t);
         return (
-          <Alert
-            variant="light"
-            color="red"
-            icon={<IconAlertTriangle size={16} />}
-            mt={4}
+          <ChatErrorAlert
             title={errorView.title}
-          >
-            {errorView.detail}
-          </Alert>
+            detail={errorView.detail}
+            mt={4}
+          />
+        );
+      })()}
+      {/* A persisted turn that was aborted (manual Stop or a dropped connection)
+          with no error banner. The server cannot tell a manual Stop from a
+          connection drop (both persist as finishReason 'aborted'), so reopened
+          history uses a combined wording. */}
+      {(() => {
+        const meta = message.metadata as
+          | { error?: string; finishReason?: string }
+          | undefined;
+        if (meta?.error || meta?.finishReason !== "aborted") return null;
+        return (
+          <ChatStoppedNotice
+            text={t("Response stopped (manually or the connection dropped).")}
+            mt={4}
+          />
         );
       })()}
     </Box>

apps/client/src/features/ai-chat/components/message-list.tsx

@@ -5,6 +5,7 @@ import type { UIMessage } from "@ai-sdk/react";
 import MessageItem from "@/features/ai-chat/components/message-item.tsx";
 import TypingIndicator from "@/features/ai-chat/components/typing-indicator.tsx";
 import { isToolPart, toolRunState, ToolUiPart } from "@/features/ai-chat/utils/tool-parts.tsx";
+import { assistantMessageHasVisibleContent } from "@/features/ai-chat/utils/message-content.ts";
 import classes from "@/features/ai-chat/components/ai-chat.module.css";
 
 interface MessageListProps {
@@ -49,7 +50,9 @@ const BOTTOM_THRESHOLD = 40;
  * assistant message's LAST part is not live output:
  *  - the last message is still the user's (assistant hasn't started a row), or
  *  - the assistant row has no parts yet, or
- *  - its last part is an empty/whitespace text part, or
+ *  - its last part is an empty/whitespace text part, or a finished ("done")
+ *    text part while the turn continues (the model paused after some narration
+ *    and is thinking about its next step), or
  *  - its last part is a finished/errored tool (the model is thinking about the
  *    next step between tool calls).
  * It hides only while output is actively rendering: a non-empty streaming text
@@ -63,7 +66,19 @@ export function showTypingIndicator(messages: UIMessage[], isStreaming: boolean)
   const lastPart = last.parts[last.parts.length - 1];
   if (!lastPart) return true; // assistant row exists but has no parts yet.
   // The answer text is actively streaming in -> MessageItem renders it; no dots.
-  if (lastPart.type === "text" && lastPart.text.trim().length > 0) return false;
+  // Only while it is STILL streaming, though: once a non-empty text part is
+  // finalized ("done") but the turn is still in flight, the model has paused
+  // after some narration and is working on its next step (e.g. about to call a
+  // tool) — nothing is visibly progressing, so the dots must show. A text part
+  // without a `state` is treated as still-rendering (kept suppressed); this
+  // branch only runs while streaming, where live parts always carry a state.
+  if (
+    lastPart.type === "text" &&
+    lastPart.text.trim().length > 0 &&
+    (lastPart as { state?: "streaming" | "done" }).state !== "done"
+  ) {
+    return false;
+  }
   // A tool still in flight shows its own Loader in ToolCallCard -> no dots.
   if (
     isToolPart(lastPart.type) &&
@@ -77,6 +92,22 @@ export function showTypingIndicator(messages: UIMessage[], isStreaming: boolean)
   return true;
 }
 
+/**
+ * Whether the standalone typing indicator should render its own assistant-name
+ * label. The indicator OWNS the name while the tail assistant row has no visible
+ * content yet (an empty streaming text part, or reasoning/step-start while the
+ * model is still thinking): in that gap the assistant MessageItem renders nothing,
+ * so the indicator stands in for the nascent bubble (name + dots) at a constant
+ * gap. It hides the name only once that row shows visible content, because then
+ * MessageItem draws the same name — avoids a duplicate stacked label and the
+ * layout jump that switching owners mid-stream used to cause.
+ */
+export function typingIndicatorShowsName(messages: UIMessage[]): boolean {
+  const last = messages[messages.length - 1];
+  if (!last || last.role !== "assistant") return true;
+  return !assistantMessageHasVisibleContent(last);
+}
+
 /**
  * Scrollable transcript. Auto-scrolls to the newest message as it streams in,
  * but only while the user is pinned to the bottom — if they scrolled up to read
@@ -173,7 +204,12 @@ export default function MessageList({
             assistantName={assistantName}
           />
         ))}
-        {typing && <TypingIndicator assistantName={assistantName} />}
+        {typing && (
+          <TypingIndicator
+            assistantName={assistantName}
+            showName={typingIndicatorShowsName(messages)}
+          />
+        )}
       </Stack>
     </ScrollArea>
   );

apps/client/src/features/ai-chat/components/reasoning-block.test.tsx

@@ -0,0 +1,65 @@
+import { describe, it, expect, vi } from "vitest";
+import { render, screen } from "@testing-library/react";
+import { MantineProvider } from "@mantine/core";
+
+// Stub react-i18next so `t` returns the key with `{{count}}` interpolated. This
+// keeps the assertions on the component's OWN count logic (authoritative vs
+// estimate) rather than on translation, and mirrors the t-mock pattern used by
+// other component tests in the repo.
+vi.mock("react-i18next", () => ({
+  useTranslation: () => ({
+    t: (key: string, opts?: { count?: number }) =>
+      opts && typeof opts.count === "number"
+        ? key.replace("{{count}}", String(opts.count))
+        : key,
+  }),
+}));
+
+import ReasoningBlock from "./reasoning-block";
+import { estimateTokens } from "@/features/ai-chat/utils/count-stream-tokens.ts";
+
+// matchMedia (read by MantineProvider) is stubbed globally in vitest.setup.ts.
+
+function renderBlock(props: { text: string; tokens?: number }) {
+  return render(
+    <MantineProvider>
+      <ReasoningBlock {...props} />
+    </MantineProvider>,
+  );
+}
+
+describe("ReasoningBlock", () => {
+  it("shows the authoritative count in the header when tokens > 0", () => {
+    // Text "thinking…" estimates to ceil(9/4) = 3, but the authoritative 42
+    // must win, so the header shows 42 (and NOT the 3-token estimate).
+    renderBlock({ text: "thinking…", tokens: 42 });
+    expect(screen.getByText("Thinking · 42 tokens")).toBeDefined();
+    expect(screen.queryByText("Thinking · 3 tokens")).toBeNull();
+  });
+
+  it("falls back to the text-length estimate when no authoritative tokens", () => {
+    const text = "some reasoning prose that streams in";
+    const estimate = estimateTokens(text);
+    renderBlock({ text });
+    expect(estimate).toBeGreaterThan(0);
+    expect(screen.getByText(new RegExp(`${estimate} tokens`))).toBeDefined();
+  });
+
+  it("header-only when text is empty but an authoritative count is present", () => {
+    renderBlock({ text: "", tokens: 17 });
+    expect(screen.getByText(/17 tokens/)).toBeDefined();
+    // No disclosure body to expand: the toggle button is disabled.
+    const button = screen.getByRole("button");
+    expect((button as HTMLButtonElement).disabled).toBe(true);
+  });
+
+  it("renders the reasoning body (markdown or raw-text fallback)", () => {
+    renderBlock({ text: "**bold** reasoning", tokens: 5 });
+    // The toggle is enabled because there IS body text to expand.
+    const button = screen.getByRole("button");
+    expect((button as HTMLButtonElement).disabled).toBe(false);
+    // The body prose renders (markdown -> sanitized html, or raw-text fallback);
+    // either way the text is present in the document.
+    expect(screen.getByText(/reasoning/)).toBeDefined();
+  });
+});

apps/client/src/features/ai-chat/components/reasoning-block.tsx

@@ -0,0 +1,89 @@
+import { useState } from "react";
+import { Box, Collapse, Group, Text, UnstyledButton } from "@mantine/core";
+import { IconChevronDown } from "@tabler/icons-react";
+import { useTranslation } from "react-i18next";
+import { estimateTokens } from "@/features/ai-chat/utils/count-stream-tokens.ts";
+import { collapseBlankLines } from "@/features/ai-chat/utils/collapse-blank-lines.ts";
+import { renderChatMarkdown } from "@/features/ai-chat/utils/markdown.ts";
+import classes from "@/features/ai-chat/components/ai-chat.module.css";
+
+interface ReasoningBlockProps {
+  /** The streamed/persisted reasoning (thinking) text. May be empty when the
+   *  provider reports only a reasoning token COUNT without the text. */
+  text: string;
+  /** Authoritative reasoning token count from `usage.reasoningTokens`, when the
+   *  step/turn has finished. When absent (or 0) the count is estimated from the
+   *  text length so it ticks live as the reasoning streams in. */
+  tokens?: number;
+}
+
+/**
+ * Collapsible "Thinking" block for an assistant `reasoning` part. Mirrors Claude
+ * Code's surfacing of the model's thinking: a header that shows the thinking
+ * token count (authoritative when the step has reported usage, else a live
+ * estimate from the streamed text) and an expandable body with the reasoning
+ * prose. Collapsed by default so it never crowds out the answer.
+ *
+ * Providers that don't stream reasoning TEXT still render this block from the
+ * authoritative count alone (header only, empty body) so the cost is visible.
+ */
+export default function ReasoningBlock({ text, tokens }: ReasoningBlockProps) {
+  const { t } = useTranslation();
+  const [open, setOpen] = useState(false);
+
+  // Authoritative count wins; otherwise estimate live from the streamed text.
+  const count = tokens && tokens > 0 ? tokens : estimateTokens(text);
+  const trimmed = text.trim();
+  // Collapse the blank-line gaps the model emits between every list item /
+  // paragraph so the reasoning renders compactly (tight lists, joined
+  // paragraphs) — see collapseBlankLines. ONLY here, not in the normal answer.
+  const html = trimmed
+    ? renderChatMarkdown(collapseBlankLines(trimmed), {})
+    : "";
+
+  return (
+    <Box className={classes.reasoningBlock} mb={6}>
+      <UnstyledButton
+        onClick={() => setOpen((o) => !o)}
+        // No body to expand when the provider reported only a token count.
+        disabled={!trimmed}
+        aria-expanded={open}
+      >
+        <Group gap={6} wrap="nowrap" align="center">
+          <IconChevronDown
+            size={12}
+            style={{
+              transform: open ? "none" : "rotate(-90deg)",
+              transition: "transform 150ms ease",
+              opacity: trimmed ? 1 : 0.4,
+            }}
+          />
+          <Text size="xs" c="dimmed">
+            {count > 0
+              ? t("Thinking · {{count}} tokens", { count })
+              : t("Thinking")}
+          </Text>
+        </Group>
+      </UnstyledButton>
+
+      {trimmed && (
+        <Collapse in={open}>
+          {html ? (
+            <div
+              className={classes.reasoningText}
+              // Sanitized by renderChatMarkdown (DOMPurify) before insertion.
+              dangerouslySetInnerHTML={{ __html: html }}
+            />
+          ) : (
+            <Text
+              className={classes.reasoningText}
+              style={{ whiteSpace: "pre-wrap" }}
+            >
+              {trimmed}
+            </Text>
+          )}
+        </Collapse>
+      )}
+    </Box>
+  );
+}

apps/client/src/features/ai-chat/components/role-cards.test.tsx

@@ -1,26 +1,10 @@
-import { describe, it, expect, vi, beforeAll } from "vitest";
+import { describe, it, expect, vi } from "vitest";
 import { render, screen, fireEvent } from "@testing-library/react";
 import { MantineProvider } from "@mantine/core";
 import RoleCards from "./role-cards";
 import { IAiRole } from "@/features/ai-chat/types/ai-chat.types.ts";
 
-// MantineProvider reads window.matchMedia (color scheme) on mount, which jsdom
-// does not implement. Provide a minimal stub so the provider can render.
-beforeAll(() => {
-  Object.defineProperty(window, "matchMedia", {
-    writable: true,
-    value: (query: string) => ({
-      matches: false,
-      media: query,
-      onchange: null,
-      addListener: vi.fn(),
-      removeListener: vi.fn(),
-      addEventListener: vi.fn(),
-      removeEventListener: vi.fn(),
-      dispatchEvent: vi.fn(),
-    }),
-  });
-});
+// matchMedia (read by MantineProvider) is stubbed globally in vitest.setup.ts.
 
 const roles: IAiRole[] = [
   {
@@ -29,6 +13,8 @@ const roles: IAiRole[] = [
     emoji: "🏴‍☠️",
     description: "Talks like a pirate",
     enabled: true,
+    autoStart: true,
+    launchMessage: null,
   },
   {
     id: "r2",
@@ -36,6 +22,8 @@ const roles: IAiRole[] = [
     emoji: null,
     description: null,
     enabled: true,
+    autoStart: true,
+    launchMessage: null,
   },
 ];
 

apps/client/src/features/ai-chat/components/show-typing-indicator.test.ts

@@ -82,4 +82,14 @@ describe("showTypingIndicator", () => {
       showTypingIndicator([msg("assistant", [doneTool, text])], true),
     ).toBe(false);
   });
+
+  it("shows while streaming after a text part is finalized (paused before the next step)", () => {
+    const doneText = { type: "text", text: "Now creating the page in", state: "done" } as unknown as UIMessage["parts"][number];
+    expect(showTypingIndicator([msg("assistant", [doneText])], true)).toBe(true);
+  });
+
+  it("hides while a text part is actively streaming (state: streaming)", () => {
+    const streamingText = { type: "text", text: "Now writ", state: "streaming" } as unknown as UIMessage["parts"][number];
+    expect(showTypingIndicator([msg("assistant", [streamingText])], true)).toBe(false);
+  });
 });

apps/client/src/features/ai-chat/components/typing-indicator-shows-name.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from "vitest";
+import type { UIMessage } from "@ai-sdk/react";
+import { typingIndicatorShowsName } from "@/features/ai-chat/components/message-list.tsx";
+
+/**
+ * Pure-helper tests for whether the standalone "Thinking…" indicator renders its
+ * own dimmed assistant-name label. The indicator OWNS the name while the tail
+ * assistant row has no visible content yet (an empty streaming text part, or
+ * reasoning/step-start while the model is still thinking) — in that gap the
+ * assistant MessageItem renders nothing, so the indicator stands in for the
+ * nascent bubble (name + dots). It hides the name only once the tail assistant
+ * row shows visible content, because then MessageItem draws the same name — this
+ * avoids a duplicate stacked label and the layout jump that switching owners
+ * mid-stream used to cause.
+ */
+const msg = (
+  role: "user" | "assistant",
+  parts: UIMessage["parts"],
+): UIMessage => ({ id: Math.random().toString(), role, parts }) as UIMessage;
+
+describe("typingIndicatorShowsName", () => {
+  it("shows the name with no messages yet (standalone, just submitted)", () => {
+    expect(typingIndicatorShowsName([])).toBe(true);
+  });
+
+  it("shows the name when the last message is still the user's", () => {
+    expect(
+      typingIndicatorShowsName([msg("user", [{ type: "text", text: "q" }])]),
+    ).toBe(true);
+  });
+
+  it("shows the name when the tail assistant row has no visible content yet (empty text part)", () => {
+    // The empty streaming text part has no visible content, so MessageItem renders
+    // nothing and the indicator owns the name (the nascent bubble).
+    expect(
+      typingIndicatorShowsName([msg("assistant", [{ type: "text", text: "" }])]),
+    ).toBe(true);
+  });
+
+  it("hides the name once the tail assistant row shows content (a tool part)", () => {
+    const doneTool = { type: "tool-getPage", state: "output-available" } as unknown as UIMessage["parts"][number];
+    expect(
+      typingIndicatorShowsName([msg("assistant", [doneTool])]),
+    ).toBe(false);
+  });
+
+  it("hides the name once the tail assistant row shows content (non-empty text)", () => {
+    expect(
+      typingIndicatorShowsName([msg("assistant", [{ type: "text", text: "answer" }])]),
+    ).toBe(false);
+  });
+});

apps/client/src/features/ai-chat/components/typing-indicator.tsx

@@ -10,6 +10,12 @@ interface TypingIndicatorProps {
    * (agent role) name.
    */
   assistantName?: string;
+  /**
+   * Whether to render the dimmed assistant-name label. Defaults to true
+   * (standalone behavior preserved). Set false between agent steps where the
+   * assistant row above already shows the same name, to avoid a duplicate label.
+   */
+  showName?: boolean;
 }
 
 /**
@@ -20,28 +26,29 @@ interface TypingIndicatorProps {
  *
  * Mirrors the assistant row layout in MessageItem (the dimmed label), so it reads
  * as the assistant's bubble taking shape. The dimmed label uses the configured
- * identity name when provided (otherwise the generic "AI agent"), while the
- * typing line is always the generic "Thinking…" (it never includes the
- * role/identity name).
+ * identity name when provided (otherwise the generic "AI agent"); below it the
+ * animated dots stand in for the nascent bubble until content arrives.
  */
-export default function TypingIndicator({ assistantName }: TypingIndicatorProps) {
+export default function TypingIndicator({ assistantName, showName = true }: TypingIndicatorProps) {
   const { t } = useTranslation();
   const name = resolveAssistantName(assistantName);
 
   return (
     <Box className={classes.messageRow}>
-      <Text size="xs" c="dimmed" mb={4}>
-        {name ?? t("AI agent")}
-      </Text>
+      {showName !== false && (
+        // Extra bottom gap (vs MessageItem's mb={4}) gives the small bouncing
+        // dots room below the name label; without it they crowd the label. Only
+        // applies when the name is shown — the nameless case spaces fine on its own.
+        <Text size="xs" c="dimmed" mb={8}>
+          {name ?? t("AI agent")}
+        </Text>
+      )}
       <Group gap={8} align="center">
         <span className={classes.typingDots} aria-hidden="true">
           <span />
           <span />
           <span />
         </span>
-        <Text size="sm" c="dimmed">
-          {t("Thinking…")}
-        </Text>
       </Group>
     </Box>
   );

apps/client/src/features/ai-chat/hooks/use-chat-session.test.tsx

@@ -0,0 +1,312 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { renderHook, act } from "@testing-library/react";
+import { useChatSession } from "./use-chat-session";
+import type { UseChatSessionOptions } from "./use-chat-session";
+
+// The props the test drives: the parent-owned subset of UseChatSessionOptions
+// (the spies are injected by setup, not per-render). messagesLoading is optional
+// here (defaulted to false in setup) for terser test call sites.
+type DriverProps = Pick<UseChatSessionOptions, "activeChatId" | "chats"> & {
+  messagesLoading?: boolean;
+};
+
+// Drive the hook the way the window does: the parent owns `activeChatId` and
+// passes it back in. `setActiveChatId` is a spy so we can assert the EXACT id the
+// hook adopts (the #137 regression: it must be the authoritative streamed id, not
+// the newest chat in the list).
+function setup(initial: DriverProps) {
+  const setActiveChatId = vi.fn();
+  const onInvalidateChatList = vi.fn();
+  const onInvalidateChatMessages = vi.fn();
+  const { result, rerender } = renderHook(
+    (props: DriverProps) =>
+      useChatSession({
+        activeChatId: props.activeChatId,
+        setActiveChatId,
+        chats: props.chats,
+        messagesLoading: props.messagesLoading ?? false,
+        onInvalidateChatList,
+        onInvalidateChatMessages,
+      }),
+    { initialProps: initial },
+  );
+  return {
+    result,
+    rerender,
+    setActiveChatId,
+    onInvalidateChatList,
+    onInvalidateChatMessages,
+  };
+}
+
+describe("useChatSession", () => {
+  beforeEach(() => vi.clearAllMocks());
+
+  it("#137 REGRESSION LOCK: adopts the authoritative streamed id, NOT items[0]", () => {
+    // Brand-new chat, list already holds a SIBLING chat B as items[0] (a second
+    // tab just created it). The server streams the real id "A" for THIS chat.
+    const { result, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "B" }] },
+    });
+    result.current.onTurnFinished("A");
+    // Must adopt the authoritative id, not the newest-in-list guess.
+    expect(setActiveChatId).toHaveBeenCalledWith("A");
+    expect(setActiveChatId).not.toHaveBeenCalledWith("B");
+  });
+
+  it("fallback adopt: arms on a server-id-less finish, adopts the single new id after refetch", () => {
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    // No server id => arm the fallback (no adoption yet).
+    result.current.onTurnFinished(undefined);
+    expect(setActiveChatId).not.toHaveBeenCalled();
+    // The refetch lands with the new row => adopt it.
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }, { id: "new" }] },
+    });
+    expect(setActiveChatId).toHaveBeenCalledWith("new");
+  });
+
+  it("fallback ambiguous: two new ids appear => no adoption", () => {
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    result.current.onTurnFinished(undefined);
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }, { id: "n1" }, { id: "n2" }] },
+    });
+    expect(setActiveChatId).not.toHaveBeenCalled();
+  });
+
+  it("fallback add+delete in one window: adopts the new id (membership compare)", () => {
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "a" }, { id: "b" }] },
+    });
+    result.current.onTurnFinished(undefined);
+    // a was deleted, new was added — same length, but membership changed.
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "b" }, { id: "new" }] },
+    });
+    expect(setActiveChatId).toHaveBeenCalledWith("new");
+  });
+
+  it("disarm on reconcile: a fallback armed then switched away is NOT adopted by a late refetch", () => {
+    // Arm the error-path fallback on a brand-new chat (snapshot before=["x"]).
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    result.current.onTurnFinished(undefined);
+    // The user switches to an existing chat C BEFORE the refetch lands; the
+    // render-phase reconciler must DISARM the pending fallback.
+    rerender({ activeChatId: "C", chats: { items: [{ id: "x" }] } });
+    // ...then starts a fresh new chat again (back to null), without re-arming.
+    rerender({ activeChatId: null, chats: { items: [{ id: "x" }] } });
+    // A late refetch now brings a new row. Because the earlier fallback was
+    // disarmed on the switch (not left armed with the stale ["x"] snapshot), it
+    // must NOT be adopted. (Without the disarm this would wrongly adopt "new".)
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }, { id: "new" }] },
+    });
+    expect(setActiveChatId).not.toHaveBeenCalledWith("new");
+  });
+
+  it("cancelPendingAdoption (selectChat) disarms a late refetch from adopting the just-failed chat", () => {
+    // cancelPendingAdoption is the explicit disarm the window calls from
+    // selectChat: switching to a chat whose id == null is a no-op for the atom, so
+    // the render-phase reconciler never fires and only this call disarms an armed
+    // error-path fallback. (startNewChat no longer routes through here — it calls
+    // startFreshThread, covered by the next test — but cancelPendingAdoption still
+    // backs selectChat, so this guard must hold.)
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    result.current.onTurnFinished(undefined); // first turn failed → arm (before=["x"])
+    result.current.cancelPendingAdoption(); // window calls this from selectChat
+    // The just-failed row lands in a late refetch; it must NOT be adopted.
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }, { id: "failed" }] },
+    });
+    expect(setActiveChatId).not.toHaveBeenCalledWith("failed");
+  });
+
+  it("#161: startFreshThread disarms the armed error-path fallback (New chat during the first turn)", () => {
+    // Pressing "New chat" while already in a not-yet-adopted new chat keeps
+    // activeChatId === null, so the render-phase reconciler never fires. The
+    // window now calls startFreshThread() (NOT cancelPendingAdoption) to force a
+    // fresh thread; this test pins the load-bearing fact that startFreshThread
+    // ALSO nulls pendingNewChatRef, so a late refetch of the just-failed row can't
+    // yank the user back into the abandoned chat.
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    result.current.onTurnFinished(undefined); // first turn failed → arm (before=["x"])
+    act(() => result.current.startFreshThread()); // "New chat" → fresh thread + disarm
+    // The just-failed row lands in a late refetch; it must NOT be adopted.
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }, { id: "failed" }] },
+    });
+    expect(setActiveChatId).not.toHaveBeenCalledWith("failed");
+  });
+
+  it("onTurnFinished for an existing chat: no adoption, invalidates that chat's messages", () => {
+    const {
+      result,
+      setActiveChatId,
+      onInvalidateChatList,
+      onInvalidateChatMessages,
+    } = setup({ activeChatId: "chat-1", chats: { items: [{ id: "chat-1" }] } });
+    result.current.onTurnFinished("chat-1");
+    expect(setActiveChatId).not.toHaveBeenCalled(); // existing chat is never re-adopted
+    expect(onInvalidateChatList).toHaveBeenCalled();
+    expect(onInvalidateChatMessages).toHaveBeenCalledWith("chat-1");
+  });
+
+  it("double onTurnFinished on a failed-after-start turn: primary adopt, 2nd no-id call does NOT re-arm the fallback", () => {
+    // ai@6 fires onFinish AND onError on a failed turn. If the failure happened
+    // AFTER the `start` chunk, onFinish carries the streamed id and onError does
+    // not — so onTurnFinished runs twice in one turn (id, then no-id) before any
+    // re-render. The 2nd call must NOT re-arm the fallback off the still-null
+    // closure; otherwise a late refetch (parent hasn't reflected the adoption yet)
+    // would wrongly adopt a sibling row.
+    const { result, rerender, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    result.current.onTurnFinished("A"); // onFinish: primary adoption
+    expect(setActiveChatId).toHaveBeenCalledWith("A");
+    result.current.onTurnFinished(undefined); // onError: same turn, no id
+    // Even in the worst case (the parent has NOT yet reflected activeChatId="A"
+    // and a late refetch lands a new row), the just-failed sibling must NOT be
+    // adopted. Two layers guarantee this: the ref guard keeps the 2nd call from
+    // re-arming at the source, and the render-phase reconciler disarms anything
+    // stale once thread.chatId ("A") diverges from the still-null activeChatId.
+    rerender({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }, { id: "late" }] },
+    });
+    expect(setActiveChatId).not.toHaveBeenCalledWith("late");
+  });
+
+  it("#174 early adopt: onServerChatId adopts the streamed id mid-stream (Copy button available during the first turn)", () => {
+    // Brand-new chat: no id yet. The server streams the real chat id "A" on the
+    // `start` chunk WHILE the first turn is still streaming (before onTurnFinished
+    // fires at the terminal outcome). The hook must adopt it immediately so the
+    // window's activeChatId-gated Copy/export button lights up during the stream.
+    const { result, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [] },
+    });
+    result.current.onServerChatId("A");
+    expect(setActiveChatId).toHaveBeenCalledWith("A");
+  });
+
+  it("#174 early adopt is in-place: threadKey stays stable (live stream not torn down)", () => {
+    const chats = { items: [] };
+    const { result, rerender } = setup({ activeChatId: null, chats });
+    const keyBefore = result.current.threadKey;
+    result.current.onServerChatId("A");
+    // Parent reflects the adopted id back in; the SAME mount key is kept so the
+    // in-flight useChat store (the streaming turn) is preserved.
+    rerender({ activeChatId: "A", chats });
+    expect(result.current.threadKey).toBe(keyBefore);
+  });
+
+  it("#174 early adopt: no-op for an existing chat and for a missing id", () => {
+    const { result, setActiveChatId } = setup({
+      activeChatId: "chat-1",
+      chats: { items: [{ id: "chat-1" }] },
+    });
+    result.current.onServerChatId("chat-1"); // already has an id
+    result.current.onServerChatId(undefined); // no streamed id
+    expect(setActiveChatId).not.toHaveBeenCalled();
+  });
+
+  it("in-place adopt keeps threadKey stable; an external switch remounts", () => {
+    const chats = { items: [{ id: "B" }] };
+    const { result, rerender } = setup({ activeChatId: null, chats });
+    const keyBefore = result.current.threadKey;
+    // Adopt the streamed id; the PARENT then reflects activeChatId="A" back in.
+    result.current.onTurnFinished("A");
+    rerender({ activeChatId: "A", chats });
+    // In-place adoption: SAME mount key (the live useChat store is preserved).
+    expect(result.current.threadKey).toBe(keyBefore);
+
+    // An EXTERNAL switch (not via adopt) to a different chat must remount: the
+    // key becomes the chat id.
+    rerender({ activeChatId: "C", chats });
+    expect(result.current.threadKey).toBe("C");
+  });
+
+  it("#161: startFreshThread remounts even when activeChatId stays null (New chat mid-stream)", () => {
+    // The bug: pressing New chat while still on a brand-new, not-yet-adopted chat
+    // leaves activeChatId === null, so the render-phase reconciler never fires.
+    // startFreshThread must remount UNCONDITIONALLY (a new mount key).
+    const { result } = setup({ activeChatId: null, chats: { items: [] } });
+    const keyBefore = result.current.threadKey;
+    act(() => result.current.startFreshThread());
+    expect(result.current.threadKey).not.toBe(keyBefore);
+  });
+
+  it("#161: a late finish from an ABANDONED thread does not adopt or invalidate messages", () => {
+    const {
+      result,
+      setActiveChatId,
+      onInvalidateChatList,
+      onInvalidateChatMessages,
+    } = setup({ activeChatId: null, chats: { items: [{ id: "x" }] } });
+    const abandonedKey = result.current.threadKey;
+    // User pressed New chat mid-stream → fresh thread (new mount key).
+    act(() => result.current.startFreshThread());
+    expect(result.current.threadKey).not.toBe(abandonedKey);
+    // The left-behind thread's onFinish fires late, carrying ITS (now stale) key
+    // and the server id of the chat the user just left. It must NOT be adopted.
+    act(() => result.current.onTurnFinished("A", abandonedKey));
+    expect(setActiveChatId).not.toHaveBeenCalled();
+    expect(onInvalidateChatMessages).not.toHaveBeenCalled();
+    // The abandoned chat should still surface in the history list.
+    expect(onInvalidateChatList).toHaveBeenCalled();
+  });
+
+  it("#161: a finish from the CURRENT thread (matching key) still adopts", () => {
+    const { result, setActiveChatId } = setup({
+      activeChatId: null,
+      chats: { items: [{ id: "x" }] },
+    });
+    // Same thread that is mounted reports its finish with the matching key.
+    act(() =>
+      result.current.onTurnFinished("A", result.current.threadKey),
+    );
+    expect(setActiveChatId).toHaveBeenCalledWith("A");
+  });
+
+  it("waitingForHistory gates the loader only while opening an unloaded existing chat", () => {
+    // Open an existing chat whose history is still loading => loader on.
+    const { result, rerender } = setup({
+      activeChatId: "chat-1",
+      chats: { items: [{ id: "chat-1" }] },
+      messagesLoading: true,
+    });
+    expect(result.current.waitingForHistory).toBe(true);
+    // Once loading finishes, the latch flips and the loader is off.
+    rerender({
+      activeChatId: "chat-1",
+      chats: { items: [{ id: "chat-1" }] },
+      messagesLoading: false,
+    });
+    expect(result.current.waitingForHistory).toBe(false);
+  });
+});

apps/client/src/features/ai-chat/hooks/use-chat-session.ts

@@ -0,0 +1,324 @@
+import { useCallback, useEffect, useReducer, useRef } from "react";
+import { generateId } from "ai";
+import {
+  resolveAdoptedChatId,
+  newlyAddedChatIds,
+} from "@/features/ai-chat/utils/adopt-chat-id.ts";
+import {
+  newThread,
+  switchThread,
+  threadSessionReducer,
+} from "@/features/ai-chat/utils/thread-identity.ts";
+
+/** Inputs to {@link useChatSession}. `activeChatId`/`setActiveChatId` are the
+ *  public selection atom (also written from outside the window, e.g. page
+ *  history); the rest is read-only context the hook needs. */
+export interface UseChatSessionOptions {
+  activeChatId: string | null;
+  setActiveChatId: (id: string | null) => void;
+  chats: { items?: { id: string }[] } | undefined;
+  messagesLoading: boolean;
+  /** Wraps queryClient.invalidateQueries(AI_CHATS_RQ_KEY). */
+  onInvalidateChatList: () => void;
+  /** Wraps the per-chat messages invalidation. */
+  onInvalidateChatMessages: (chatId: string) => void;
+}
+
+/** What the window needs from a chat session: the ChatThread mount key, the
+ *  history-loader gate, and the turn-finished callback. */
+export interface UseChatSessionResult {
+  /** ChatThread mount key (was `thread.key`). */
+  threadKey: string;
+  /** Show the history loader instead of the live thread. */
+  waitingForHistory: boolean;
+  /** Call when a turn finishes; `serverChatId` is the authoritative streamed id
+   *  (undefined on a failed turn). `finishingThreadKey` is the mount key of the
+   *  thread that produced this callback — when it no longer matches the mounted
+   *  thread (the user pressed New chat / switched mid-stream), the call is from an
+   *  abandoned thread and must NOT adopt or re-arm the fallback. Omitting it (old
+   *  callers / tests) treats the call as belonging to the current thread. Handles
+   *  new-chat id adoption + invalidations. */
+  onTurnFinished: (serverChatId?: string, finishingThreadKey?: string) => void;
+  /** Call EARLY (at the stream's `start` chunk) with the authoritative streamed
+   *  chat id so a brand-new chat adopts its real id WHILE its first turn is still
+   *  streaming — making `activeChatId`-gated affordances (e.g. the Copy/export
+   *  button, #174) available immediately. In-place adoption only (same mount key,
+   *  no list/messages invalidation — that is left to onTurnFinished at the end).
+   *  Idempotent and a no-op once the chat already has an id. */
+  onServerChatId: (serverChatId?: string) => void;
+  /** Force a brand-new, empty thread (new mount key, no chat id) UNCONDITIONALLY.
+   *  The render-phase reconciler only remounts when `activeChatId` actually
+   *  changes; pressing "New chat" while already in a not-yet-adopted new chat
+   *  leaves `activeChatId === null` (a no-op for the atom), so the reconciler
+   *  never fires and the stale streaming thread stays mounted (#161). The window
+   *  calls this from startNewChat to guarantee a fresh thread regardless. */
+  startFreshThread: () => void;
+  /** Disarm any pending error-path new-chat fallback. The window calls this from
+   *  startNewChat/selectChat so a late refetch can't yank the user back into a
+   *  just-failed chat after they explicitly moved on. */
+  cancelPendingAdoption: () => void;
+}
+
+/** Project a chat list to its id array (the before/after snapshot for the
+ *  error-path fallback). */
+function chatIdSnapshot(
+  chats: { items?: { id: string }[] } | undefined,
+): string[] {
+  return chats?.items?.map((c) => c.id) ?? [];
+}
+
+/**
+ * Owns the AI-chat thread-identity lifecycle: the single atomic thread identity,
+ * both new-chat id adoption paths (primary streamed-metadata + bounded error-path
+ * fallback), the history-loaded latch, and the render-phase reconciler that keeps
+ * the thread's mount key in sync with the public `activeChatId` atom.
+ *
+ * This is the twice-bugged area for the #137 two-tab adoption race; the canonical
+ * explanation of the adoption design lives in adopt-chat-id.ts.
+ */
+export function useChatSession(
+  params: UseChatSessionOptions,
+): UseChatSessionResult {
+  const {
+    activeChatId,
+    setActiveChatId,
+    chats,
+    messagesLoading,
+    onInvalidateChatList,
+    onInvalidateChatMessages,
+  } = params;
+
+  // Live mirror of `activeChatId`, read by onTurnFinished. ai@6 fires both
+  // onFinish AND onError on a failed turn, so onTurnFinished can run twice in one
+  // turn (once with the streamed id, once without) BEFORE a re-render. Reading
+  // the ref — which the primary-adoption branch updates imperatively — makes that
+  // second call see the just-adopted id, so it cannot re-arm the fallback. (A
+  // plain closure over `activeChatId` would still read null on the second call.)
+  const activeChatIdRef = useRef(activeChatId);
+  activeChatIdRef.current = activeChatId;
+
+  // Live mirror of the mounted thread's key, read by onTurnFinished to tell a
+  // current-thread finish from an ABANDONED one. ai@6's useChat does not abort
+  // its request on unmount, and its callbacks are proxied so onFinish/onError of
+  // a thread the user already left (via New chat / switch) still fire AFTER that
+  // thread unmounts. By then this ref holds the NEW thread's key, so comparing it
+  // to the key the finishing thread reports rejects the abandoned turn (#161).
+  const threadKeyRef = useRef<string>("");
+
+  // The mounted thread's identity: ONE atomic value tying ChatThread's mount key
+  // (`thread.key`) to the chat id that mounted thread holds (`thread.chatId`).
+  // Consolidating these makes the "key vs chat id diverged" state unrepresentable
+  // — every change goes through an explicit transition (see thread-identity.ts):
+  // `newThread`/`switchThread` to (re)mount, `adoptThread` for in-place adoption.
+  // Initial: a non-null activeChatId switches to it; a null one gets a fresh
+  // session key with no chat id yet.
+  const [thread, dispatch] = useReducer(threadSessionReducer, undefined, () =>
+    activeChatId === null
+      ? newThread(`new-${generateId()}`)
+      : switchThread(activeChatId),
+  );
+
+  // Keep the live mirror pointed at the currently-mounted thread's key so a late
+  // onTurnFinished can be matched against it (see threadKeyRef above).
+  threadKeyRef.current = thread.key;
+
+  // Error-path fallback for new-chat id adoption. When a brand-new chat's first
+  // turn errors BEFORE the server's `start` chunk, no authoritative chatId ever
+  // reaches the client, so the primary metadata adoption cannot run. We then ARM
+  // this ref with a snapshot of the currently-known chat ids; once the list
+  // refetch lands with the just-created row, the fallback effect below adopts the
+  // SINGLE newly-appeared id. `null` = not armed. See adopt-chat-id.ts (#137).
+  const pendingNewChatRef = useRef<string[] | null>(null);
+
+  // Latch: the chat id whose full persisted history has finished loading while
+  // its thread is mounted. Used so a later BACKGROUND refetch (the post-turn
+  // messages invalidation) never tears the live thread back down to the loader.
+  const historyLoadedKeyRef = useRef<string | null>(null);
+
+  // After a turn finishes, refresh the chat list. For a brand-new chat (no id
+  // yet) we adopt the server's AUTHORITATIVE streamed id (never the newest in the
+  // list, which races a second tab — #137; see adopt-chat-id.ts).
+  const onTurnFinished = useCallback(
+    (serverChatId?: string, finishingThreadKey?: string) => {
+      // Reject a finish from an ABANDONED thread. After the user pressed New chat
+      // (or switched chats) mid-stream, the left-behind thread's onFinish/onError
+      // still fire (ai@6 does not abort on unmount). Adopting/arming off that late
+      // callback would yank the user back into the chat they just left (#161).
+      // `undefined` (legacy callers/tests) is treated as the current thread.
+      const isCurrentThread =
+        finishingThreadKey === undefined ||
+        finishingThreadKey === threadKeyRef.current;
+      if (!isCurrentThread) {
+        // Still surface the abandoned chat in the history list, but do NOT adopt,
+        // arm the fallback, or invalidate per-chat messages (no thread shows it).
+        onInvalidateChatList();
+        return;
+      }
+      // Read the live id from the ref, not the closure: on a failed turn this can
+      // run twice in one turn (onFinish + onError) before any re-render, and the
+      // primary branch below updates the ref so the second call sees the adopted id.
+      const current = activeChatIdRef.current;
+      const adopted = resolveAdoptedChatId(current, serverChatId);
+      if (adopted) {
+        // PRIMARY path. In-place adoption: set the public selection and the
+        // thread identity to the real id together. `adopt` keeps the SAME mount
+        // key, so the render-phase reconciler sees `activeChatId === thread.chatId`
+        // and keeps the SAME mounted thread (its useChat already holds the
+        // just-finished turn) instead of remounting + re-seeding from
+        // not-yet-persisted history.
+        activeChatIdRef.current = adopted; // a same-turn 2nd call now sees the id
+        setActiveChatId(adopted);
+        dispatch({ type: "adopt", chatId: adopted });
+        // Primary adoption won — disarm any previously-armed fallback.
+        pendingNewChatRef.current = null;
+      } else if (current === null) {
+        // FALLBACK path: a brand-new chat finished with NO server id (the first
+        // turn errored before the `start` chunk). Arm the bounded list-refetch
+        // fallback by snapshotting the currently-known chat ids. `chats` is still
+        // the pre-refetch list here, so the just-created row is NOT yet in it; the
+        // effect below adopts the single id that newly appears after the refetch.
+        pendingNewChatRef.current = chatIdSnapshot(chats);
+      }
+      onInvalidateChatList();
+      // Re-sync the persisted message rows for the active chat so the Markdown
+      // export and token counters reflect the just-finished turn. The live thread
+      // renders from its own useChat store (stable thread.key), so this never
+      // re-seeds or tears down the open thread. For a brand-new chat `current` is
+      // still null here; later turns hit this with the adopted id.
+      if (current) {
+        onInvalidateChatMessages(current);
+      }
+    },
+    [chats, setActiveChatId, onInvalidateChatList, onInvalidateChatMessages],
+  );
+
+  // EARLY adoption (#174): adopt the authoritative streamed chat id the moment
+  // the server emits it on the `start` chunk, so a brand-new chat gets its real
+  // `activeChatId` WHILE its first turn streams — not only at terminal
+  // onTurnFinished. This makes the activeChatId-gated Copy/export button
+  // available during the first turn. Pure in-place adoption (same mount key, like
+  // the primary path) with NO invalidation: the list/messages refresh stays on
+  // onTurnFinished at the end of the turn. Reads the live id from the ref so a
+  // repeat call after adoption is a no-op (resolveAdoptedChatId only fires for a
+  // still-new chat).
+  const onServerChatId = useCallback(
+    (serverChatId?: string) => {
+      const adopted = resolveAdoptedChatId(
+        activeChatIdRef.current,
+        serverChatId,
+      );
+      if (!adopted) return;
+      activeChatIdRef.current = adopted;
+      setActiveChatId(adopted);
+      dispatch({ type: "adopt", chatId: adopted });
+      // Early adoption beat the error-path fallback to it — disarm.
+      pendingNewChatRef.current = null;
+    },
+    [setActiveChatId],
+  );
+
+  // FALLBACK resolver. Armed only by onTurnFinished when a brand-new chat's first
+  // turn errored before the `start` chunk (no authoritative id streamed). Once
+  // the per-user list refetch lands with the just-created row, adopt the SINGLE
+  // id that newly appeared relative to the pre-refetch snapshot. Adoption is IN
+  // PLACE (set activeChatId + `adopt` together) like the primary path, so the
+  // render-phase reconciler does not remount.
+  useEffect(() => {
+    const before = pendingNewChatRef.current;
+    if (before === null || activeChatId !== null) return; // not armed / already adopted
+    const after = chatIdSnapshot(chats);
+    const added = newlyAddedChatIds(before, after);
+    // Keep waiting until a genuinely-new id appears. Set-based, so it is robust
+    // to an add+delete in the same window (a length compare would miss it), and
+    // it deliberately keeps waiting through an unrelated deletion (no new id yet)
+    // until the just-created row actually lands, rather than giving up early.
+    if (added.size === 0) return; // list not refetched yet — keep waiting
+    pendingNewChatRef.current = null; // resolved — disarm
+    if (added.size === 1) {
+      // single unambiguous new id; >1 = ambiguous → give up
+      const adopted = [...added][0];
+      setActiveChatId(adopted);
+      dispatch({ type: "adopt", chatId: adopted });
+    }
+  }, [chats, activeChatId, setActiveChatId]);
+
+  // Reconcile the thread identity against the active-chat atom during render when
+  // they diverge — the React-sanctioned alternative to an effect (re-renders
+  // before paint, no extra commit, and converges since the next render finds them
+  // equal). This reconciliation MUST remain: `activeChatId` is the public
+  // selection and is ALSO set from OUTSIDE this component (e.g. page-history opens
+  // a referenced chat via setActiveChatId). A divergence here is a genuine SWITCH
+  // (external atom change OR user switch via selectChat/startNewChat), so
+  // `reconcile` remounts + reseeds. In-place adoption never reaches this branch:
+  // it set activeChatId and thread.chatId to the same value.
+  if (activeChatId !== thread.chatId) {
+    // A genuine switch makes any pending error-path new-chat fallback moot.
+    pendingNewChatRef.current = null;
+    dispatch({
+      type: "reconcile",
+      chatId: activeChatId,
+      newKey: `new-${generateId()}`,
+    });
+  }
+
+  // Latch the active chat once its full history has loaded and its thread is
+  // mounted, so a later background refetch (the post-turn messages invalidation,
+  // which can transiently flip hasNextPage for a chat whose message count is an
+  // exact multiple of the server page size) does not tear the live thread down to
+  // a loader and lose its in-progress useChat state.
+  if (
+    activeChatId !== null &&
+    thread.key === activeChatId &&
+    !messagesLoading &&
+    historyLoadedKeyRef.current !== activeChatId
+  ) {
+    historyLoadedKeyRef.current = activeChatId;
+  }
+
+  // Show the history loader only when freshly OPENING an existing chat (the key
+  // equals the chat id) whose history has not been fully loaded yet. For a live
+  // in-place thread that adopted its id, the key is still the "new-…" session
+  // key, so the live thread keeps rendering; and once a chat's history has loaded,
+  // a later background refetch no longer tears it down (see the latch above).
+  const waitingForHistory =
+    activeChatId !== null &&
+    messagesLoading &&
+    thread.key === activeChatId &&
+    historyLoadedKeyRef.current !== activeChatId;
+
+  // Explicit disarm for startNewChat/selectChat. The render-phase reconciler only
+  // disarms when activeChatId actually changes, but "New chat" pressed while the
+  // user is ALREADY in a new chat is a no-op for the atom (activeChatId stays
+  // null), so the reconciler never fires — without this an armed fallback could
+  // adopt the just-failed chat from a late refetch and yank the user out of their
+  // fresh chat. Stable identity (writes a ref).
+  const cancelPendingAdoption = useCallback(() => {
+    pendingNewChatRef.current = null;
+  }, []);
+
+  // Force a fresh, empty thread regardless of the current `activeChatId`. The
+  // render-phase reconciler only remounts on an activeChatId CHANGE, so "New chat"
+  // pressed while already in a not-yet-adopted new chat (activeChatId stays null)
+  // would otherwise leave the in-flight streaming thread mounted (#161). Dispatch
+  // `reconcile` to chatId:null with a brand-new key so React remounts ChatThread
+  // (a fresh useChat store). Disarm any armed fallback too. After this dispatch
+  // thread.chatId is null; the window also sets activeChatId to null, so the
+  // render-phase reconciler then finds them equal and does not double-remount.
+  const startFreshThread = useCallback(() => {
+    pendingNewChatRef.current = null;
+    dispatch({
+      type: "reconcile",
+      chatId: null,
+      newKey: `new-${generateId()}`,
+    });
+  }, []);
+
+  return {
+    threadKey: thread.key,
+    waitingForHistory,
+    onTurnFinished,
+    onServerChatId,
+    startFreshThread,
+    cancelPendingAdoption,
+  };
+}

apps/client/src/features/ai-chat/services/ai-chat-service.ts

@@ -50,6 +50,24 @@ export async function deleteAiChat(chatId: string): Promise<void> {
   await api.post("/ai-chat/delete", { chatId });
 }
 
+/**
+ * Export a chat to Markdown (#183). The server renders the transcript from the
+ * persisted rows (the DB is the single source of truth — including an
+ * interrupted turn's in-progress row, persisted upfront + per step), so the
+ * client just copies the returned string. `lang` localizes the few fixed
+ * role/tool labels; defaults to English server-side when omitted.
+ */
+export async function exportAiChat(
+  chatId: string,
+  lang?: string,
+): Promise<string> {
+  const req = await api.post<{ markdown: string }>("/ai-chat/export", {
+    chatId,
+    lang,
+  });
+  return req.data.markdown;
+}
+
 /**
  * Agent roles API (`/ai-chat/roles`). `list` is available to any workspace
  * member (for the chat-creation picker); create/update/delete are admin-only
@@ -76,6 +94,8 @@ export async function updateAiRole(data: IAiRoleUpdate): Promise<IAiRole> {
 
 /** Soft-delete a role (admin). */
 export async function deleteAiRole(id: string): Promise<{ success: true }> {
-  const req = await api.post<{ success: true }>("/ai-chat/roles/delete", { id });
+  const req = await api.post<{ success: true }>("/ai-chat/roles/delete", {
+    id,
+  });
   return req.data;
 }

apps/client/src/features/ai-chat/types/ai-chat.types.ts

@@ -53,6 +53,10 @@ export interface IAiRole {
   instructions?: string;
   modelConfig?: IAiRoleModelConfig | null;
   enabled: boolean;
+  // Whether picking the role auto-sends a launch message and starts the chat.
+  autoStart: boolean;
+  // Custom auto-start text; null/empty => the default launch message is sent.
+  launchMessage: string | null;
   createdAt?: string;
   updatedAt?: string;
 }
@@ -65,6 +69,8 @@ export interface IAiRoleCreate {
   instructions: string;
   modelConfig?: IAiRoleModelConfig | null;
   enabled?: boolean;
+  autoStart?: boolean;
+  launchMessage?: string;
 }
 
 /** Admin update payload for a role (partial). */
@@ -76,6 +82,8 @@ export interface IAiRoleUpdate {
   instructions?: string;
   modelConfig?: IAiRoleModelConfig | null;
   enabled?: boolean;
+  autoStart?: boolean;
+  launchMessage?: string;
 }
 
 /**
@@ -98,6 +106,10 @@ export interface IAiChatMessageRow {
       inputTokens?: number;
       outputTokens?: number;
       totalTokens?: number;
+      // Reasoning (thinking) tokens, when the provider reports them. Optional so
+      // old history rows (recorded before this shipped) stay valid. Included in
+      // `outputTokens` per the AI SDK usage shape.
+      reasoningTokens?: number;
     };
     // Current context size for the turn = final-step (input+output) tokens, i.e.
     // how much the conversation occupies in the model's context window after this
@@ -107,6 +119,11 @@ export interface IAiChatMessageRow {
     // Set on an assistant row whose turn ended in a provider/stream error; the
     // raw provider error text (e.g. "402: ...") for inline display in the thread.
     error?: string;
+    // Terminal outcome of the assistant turn: 'error' (provider/stream error,
+    // paired with `error`), 'aborted' (client disconnect — a manual Stop or a
+    // dropped connection), or the SDK's finish reason on a clean turn. The UI
+    // renders a "stopped" marker on interrupted turns.
+    finishReason?: string;
   } | null;
   createdAt: string;
 }

apps/client/src/features/ai-chat/utils/adopt-chat-id.test.ts

@@ -0,0 +1,72 @@
+import { describe, it, expect } from "vitest";
+import {
+  resolveAdoptedChatId,
+  newlyAddedChatIds,
+  extractServerChatId,
+} from "./adopt-chat-id";
+
+describe("resolveAdoptedChatId", () => {
+  it("adopts the server id for a brand-new chat (activeChatId null + id)", () => {
+    expect(resolveAdoptedChatId(null, "chat-1")).toBe("chat-1");
+  });
+
+  it("returns null for an existing chat even with a server id", () => {
+    expect(resolveAdoptedChatId("chat-existing", "chat-1")).toBeNull();
+  });
+
+  it("returns null for a new chat with no server id", () => {
+    expect(resolveAdoptedChatId(null, undefined)).toBeNull();
+    expect(resolveAdoptedChatId(null, null)).toBeNull();
+  });
+});
+
+describe("newlyAddedChatIds", () => {
+  it("returns the single new id", () => {
+    expect([...newlyAddedChatIds(["a", "b"], ["a", "b", "c"])]).toEqual(["c"]);
+  });
+
+  it("returns an empty set when nothing was added", () => {
+    expect(newlyAddedChatIds(["a", "b"], ["b", "a"]).size).toBe(0);
+  });
+
+  it("returns both new ids when two were added", () => {
+    expect(newlyAddedChatIds(["a"], ["a", "b", "c"])).toEqual(
+      new Set(["b", "c"]),
+    );
+  });
+
+  it("keeps only the new id across an add+delete in the same window", () => {
+    // before [a,b] -> after [b,new]: a was deleted, new was added.
+    expect([...newlyAddedChatIds(["a", "b"], ["b", "new"])]).toEqual(["new"]);
+  });
+
+  it("dedupes a repeated new id to a single entry", () => {
+    expect(newlyAddedChatIds(["a"], ["a", "new", "new"])).toEqual(
+      new Set(["new"]),
+    );
+  });
+});
+
+describe("extractServerChatId", () => {
+  it("returns the chatId when present on metadata", () => {
+    expect(extractServerChatId({ metadata: { chatId: "chat-1" } })).toBe(
+      "chat-1",
+    );
+  });
+
+  it("returns undefined when the message has no metadata", () => {
+    expect(extractServerChatId({})).toBeUndefined();
+  });
+
+  it("returns undefined when metadata lacks chatId", () => {
+    expect(extractServerChatId({ metadata: { other: 1 } })).toBeUndefined();
+  });
+
+  it("returns undefined for a non-string chatId", () => {
+    expect(extractServerChatId({ metadata: { chatId: 42 } })).toBeUndefined();
+  });
+
+  it("returns undefined for an undefined message", () => {
+    expect(extractServerChatId(undefined)).toBeUndefined();
+  });
+});

apps/client/src/features/ai-chat/utils/adopt-chat-id.ts

@@ -0,0 +1,70 @@
+/**
+ * Pure helpers for adopting a brand-new chat's authoritative server id.
+ *
+ * ============================ CANONICAL #137 NOTE ============================
+ * This docblock is the single authoritative explanation of the new-chat id
+ * adoption design and the #137 two-tab race it fixes. Other call sites
+ * (use-chat-session.ts, the server's `chatStreamMetadata`) reference here
+ * rather than restating it.
+ *
+ * When a user sends the first turn of a BRAND-NEW chat, the client has no chat
+ * id yet (`activeChatId === null`). The server creates the row and the client
+ * must "adopt" that row's real id so the SECOND turn targets the same chat.
+ *
+ * The OLD heuristic adopted `items[0]` — the newest chat in the refetched list.
+ * That races a second tab: if another tab created a chat in the same moment,
+ * its row could be `items[0]`, so this tab would adopt the SIBLING chat and
+ * leak its later turns into it (#137). We adopt by IDENTITY instead, two ways:
+ *
+ * PRIMARY path: the server streams the real chat id on the assistant message
+ * metadata's `start` part (see `chatStreamMetadata` server-side);
+ * `extractServerChatId` reads it off the finished message and
+ * `resolveAdoptedChatId` turns it into the id to adopt for a new chat. This is
+ * authoritative and immune to the race.
+ *
+ * FALLBACK path (only when a new chat's first turn errors BEFORE the `start`
+ * chunk, so no metadata id ever reached the client): adopt the single chat that
+ * NEWLY appeared in the per-user list relative to a pre-refetch snapshot —
+ * `newlyAddedChatIds` (the fallback effect adopts only when exactly one id is
+ * new). This is unambiguous and does not race a second tab the way the old
+ * "newest chat in the list" guess did.
+ * ============================================================================
+ */
+
+/**
+ * Resolve the id to adopt from the server-streamed metadata. Returns
+ * `serverChatId` only for a brand-new chat (`activeChatId === null`) that
+ * received a truthy id; otherwise null (existing chat, or no id streamed).
+ */
+export function resolveAdoptedChatId(
+  activeChatId: string | null,
+  serverChatId: string | null | undefined,
+): string | null {
+  return activeChatId === null && serverChatId ? serverChatId : null;
+}
+
+/**
+ * Read the authoritative server chat id off a finished assistant message. The
+ * server attaches it as `message.metadata.chatId` on the `start` part (see
+ * `chatStreamMetadata`). Returns it only when it is a string; undefined for
+ * a missing message, missing metadata, or a non-string `chatId`.
+ */
+export function extractServerChatId(
+  message: { metadata?: unknown } | undefined,
+): string | undefined {
+  const m = message?.metadata as { chatId?: string } | undefined;
+  return typeof m?.chatId === "string" ? m.chatId : undefined;
+}
+
+/**
+ * The deduped set of ids present in `afterIds` but not in `beforeIds`. A
+ * paginated/flatMapped list can repeat the same id, so dedupe: one genuinely-new
+ * chat must not read as multiple from a duplicate.
+ */
+export function newlyAddedChatIds(
+  beforeIds: readonly string[],
+  afterIds: readonly string[],
+): Set<string> {
+  const before = new Set(beforeIds);
+  return new Set(afterIds.filter((id) => !before.has(id)));
+}

apps/client/src/features/ai-chat/utils/chat-markdown.test.ts

@@ -1,317 +0,0 @@
-import { describe, it, expect } from "vitest";
-import { buildChatMarkdown } from "@/features/ai-chat/utils/chat-markdown.ts";
-import type { IAiChatMessageRow } from "@/features/ai-chat/types/ai-chat.types.ts";
-
-/**
- * Tests for the client-only Markdown export builder. The output embeds a live
- * `new Date().toISOString()` export timestamp; we never assert that value, only
- * the deterministic structure (headings, numbering, fenced blocks, totals).
- *
- * A pass-through translator keeps role/tool labels predictable so the
- * structural assertions are stable without an i18n runtime.
- */
-const t = (key: string, values?: Record<string, unknown>): string => {
-  if (values && typeof values.name === "string") {
-    return key.replace("{{name}}", values.name);
-  }
-  return key;
-};
-
-function row(partial: Partial<IAiChatMessageRow>): IAiChatMessageRow {
-  return {
-    id: partial.id ?? "id",
-    role: partial.role ?? "user",
-    content: partial.content ?? null,
-    metadata: partial.metadata ?? null,
-    createdAt: partial.createdAt ?? "2026-06-21T00:00:00.000Z",
-  };
-}
-
-describe("buildChatMarkdown — structure", () => {
-  it("emits the title heading, chat id and message count", () => {
-    const md = buildChatMarkdown({
-      title: "My chat",
-      chatId: "chat-123",
-      rows: [],
-      t,
-    });
-    expect(md).toContain("# My chat");
-    expect(md).toContain("- Chat ID: `chat-123`");
-    expect(md).toContain("- Messages: 0");
-    expect(md).toContain("- Exported:"); // timestamp present, value not asserted
-  });
-
-  it("falls back to the translated 'Untitled chat' for empty/blank titles", () => {
-    expect(
-      buildChatMarkdown({ title: null, chatId: "c", rows: [], t }),
-    ).toContain("# Untitled chat");
-    expect(
-      buildChatMarkdown({ title: "   ", chatId: "c", rows: [], t }),
-    ).toContain("# Untitled chat");
-  });
-
-  it("numbers rows sequentially with role headings", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({ role: "user", content: "hi" }),
-        row({ role: "assistant", content: "hello" }),
-        row({ role: "user", content: "again" }),
-      ],
-      t,
-    });
-    expect(md).toContain("## 1. You");
-    expect(md).toContain("## 2. AI agent");
-    expect(md).toContain("## 3. You");
-    // Heading numbering is strictly index+1, not e.g. role-relative.
-    expect(md).not.toContain("## 0.");
-  });
-
-  it("renders the per-row text content from `content` when no metadata.parts", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [row({ role: "user", content: "plain body" })],
-      t,
-    });
-    expect(md).toContain("plain body");
-  });
-});
-
-describe("buildChatMarkdown — text parts", () => {
-  it("skips empty / whitespace-only text parts", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "ignored-content",
-          metadata: {
-            parts: [
-              { type: "text", text: "   " },
-              { type: "text", text: "" },
-              { type: "text", text: "kept line" },
-              // eslint-disable-next-line @typescript-eslint/no-explicit-any
-            ] as any,
-          },
-        }),
-      ],
-      t,
-    });
-    expect(md).toContain("kept line");
-    // Whitespace-only part contributed no block of its own.
-    expect(md).not.toContain("   \n\n");
-    // When metadata.parts exists, the plain `content` fallback is NOT used.
-    expect(md).not.toContain("ignored-content");
-  });
-});
-
-describe("buildChatMarkdown — tool parts", () => {
-  it("renders a tool label, name, state and fenced Input/Output blocks", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "",
-          metadata: {
-            parts: [
-              {
-                type: "tool-getPage",
-                state: "output-available",
-                input: { pageId: "p1" },
-                output: { id: "p1", title: "Home" },
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-              } as any,
-            ],
-          },
-        }),
-      ],
-      t,
-    });
-    // Known tool name maps to its label key; raw name in backticks; done state.
-    expect(md).toContain("**Tool: Read page** (`getPage`) — done");
-    expect(md).toContain("Input:");
-    expect(md).toContain("Output:");
-    // Fenced JSON blocks contain the stringified payloads.
-    expect(md).toContain('"pageId": "p1"');
-    expect(md).toContain('"title": "Home"');
-    expect(md).toContain("```json");
-  });
-
-  it("renders the generic label for an unknown tool and surfaces errorText", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "",
-          metadata: {
-            parts: [
-              {
-                type: "tool-mysteryTool",
-                state: "output-error",
-                input: { a: 1 },
-                errorText: "boom",
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-              } as any,
-            ],
-          },
-        }),
-      ],
-      t,
-    });
-    expect(md).toContain("**Tool: Ran tool mysteryTool** (`mysteryTool`) — error");
-    expect(md).toContain("**Error:** boom");
-  });
-
-  it("does not throw on a circular tool input (falls back to String)", () => {
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const circular: any = {};
-    circular.self = circular;
-    expect(() =>
-      buildChatMarkdown({
-        title: "t",
-        chatId: "c",
-        rows: [
-          row({
-            role: "assistant",
-            content: "",
-            metadata: {
-              parts: [
-                {
-                  type: "tool-getPage",
-                  state: "input-available",
-                  input: circular,
-                  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                } as any,
-              ],
-            },
-          }),
-        ],
-        t,
-      }),
-    ).not.toThrow();
-  });
-});
-
-describe("buildChatMarkdown — fence anti-breakout", () => {
-  it("lengthens the delimiter so embedded ``` cannot break out of the block", () => {
-    // Tool input whose stringified string form contains a literal ``` run.
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "",
-          metadata: {
-            parts: [
-              {
-                type: "tool-getPage",
-                state: "output-available",
-                // A bare string passes through stringify() verbatim.
-                input: "before ``` after",
-                output: "x",
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-              } as any,
-            ],
-          },
-        }),
-      ],
-      t,
-    });
-    // The fence around the 3-backtick content must use at least 4 backticks so
-    // the embedded ``` run cannot terminate the block.
-    expect(md).toContain("````json\nbefore ``` after\n````");
-    // Robust anti-breakout check: the opening fence delimiter is strictly
-    // longer than the longest backtick run inside the wrapped content. (A naive
-    // `not.toContain("```json...")` is a false negative — a 4-backtick fence
-    // textually contains the 3-backtick substring.)
-    const open = md.match(/(`{3,})json\nbefore/);
-    expect(open).not.toBeNull();
-    expect(open![1].length).toBeGreaterThan(3); // > the 3-backtick run in content
-  });
-
-  it("uses a 5-backtick fence when the content has a 4-backtick run", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "",
-          metadata: {
-            parts: [
-              {
-                type: "tool-getPage",
-                state: "output-available",
-                input: "a ```` b",
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-              } as any,
-            ],
-          },
-        }),
-      ],
-      t,
-    });
-    expect(md).toContain("`````json\na ```` b\n`````");
-  });
-});
-
-describe("buildChatMarkdown — token totals", () => {
-  it("prints the total-tokens line only when the summed usage is > 0", () => {
-    const withTokens = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "x",
-          metadata: { usage: { inputTokens: 10, outputTokens: 5 } },
-        }),
-      ],
-      t,
-    });
-    expect(withTokens).toContain("- Total tokens: 15");
-    // Per-row usage footer too.
-    expect(withTokens).toContain("_Tokens — in: 10, out: 5, total: 15_");
-  });
-
-  it("omits the total-tokens line when the sum is 0 / usage absent", () => {
-    const noTokens = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({ role: "user", content: "hi" }),
-        row({
-          role: "assistant",
-          content: "x",
-          metadata: { usage: { inputTokens: 0, outputTokens: 0 } },
-        }),
-      ],
-      t,
-    });
-    expect(noTokens).not.toContain("- Total tokens:");
-  });
-
-  it("uses totalTokens when present rather than summing in/out", () => {
-    const md = buildChatMarkdown({
-      title: "t",
-      chatId: "c",
-      rows: [
-        row({
-          role: "assistant",
-          content: "x",
-          metadata: { usage: { inputTokens: 3, outputTokens: 4, totalTokens: 99 } },
-        }),
-      ],
-      t,
-    });
-    expect(md).toContain("- Total tokens: 99");
-  });
-});

apps/client/src/features/ai-chat/utils/chat-markdown.ts

@@ -1,165 +0,0 @@
-/**
- * Client-only Markdown builder for an AI agent chat. Serializes the already
- * persisted message rows (loaded via `useAiChatMessagesQuery`) into a single
- * Markdown string suitable for copying to the clipboard. NO network call is
- * made and NO server/DB code is touched — this reuses the rich "request
- * internals" (tool calls with input/output, per-message token usage,
- * finish/error info) that the chat already holds client-side.
- *
- * Only role labels and tool action labels are localized via the passed-in `t`
- * translator; the structural document words (Input/Output/Error/Tokens/...) are
- * plain English constants because the output is a technical artifact.
- */
-
-import type { IAiChatMessageRow } from "@/features/ai-chat/types/ai-chat.types.ts";
-import {
-  ToolUiPart,
-  getToolName,
-  toolRunState,
-  toolLabelKey,
-} from "@/features/ai-chat/utils/tool-parts.tsx";
-
-// Minimal translator signature compatible with react-i18next's `t`.
-type Translate = (key: string, values?: Record<string, unknown>) => string;
-
-interface BuildChatMarkdownArgs {
-  title: string | null;
-  chatId: string;
-  rows: IAiChatMessageRow[];
-  t: Translate;
-}
-
-/** A single AI SDK UIMessage part (text part or other). */
-interface TextLikePart {
-  type: string;
-  text?: string;
-}
-
-/**
- * Stringify an arbitrary tool input/output value for a fenced block. Strings
- * pass through as-is; everything else is pretty-printed JSON, falling back to
- * `String(value)` if serialization throws (e.g. a circular structure).
- */
-function stringify(value: unknown): string {
-  if (typeof value === "string") return value;
-  try {
-    return JSON.stringify(value, null, 2);
-  } catch {
-    return String(value);
-  }
-}
-
-/**
- * Wrap `code` in a fenced code block whose backtick delimiter is LONGER than
- * the longest backtick run inside the content, so embedded backticks (or even
- * a literal ``` fence) never break out of the block. Minimum 3 backticks.
- */
-function fence(code: string, lang = ""): string {
-  const runs: string[] = code.match(/`+/g) ?? [];
-  const longest = runs.reduce((m, s) => Math.max(m, s.length), 0);
-  const delim = "`".repeat(Math.max(3, longest + 1));
-  return `${delim}${lang}\n${code}\n${delim}`;
-}
-
-/** Per-row token count, mirroring the header sum in ai-chat-window.tsx. */
-function rowTokens(usage: {
-  inputTokens?: number;
-  outputTokens?: number;
-  totalTokens?: number;
-}): number {
-  return (
-    usage.totalTokens ?? (usage.inputTokens ?? 0) + (usage.outputTokens ?? 0)
-  );
-}
-
-/**
- * Serialize a chat to a Markdown string. Pure (apart from `new Date()` for the
- * export timestamp), so it is straightforward to unit-test.
- */
-export function buildChatMarkdown(args: BuildChatMarkdownArgs): string {
-  const { title, chatId, rows, t } = args;
-  const blocks: string[] = [];
-
-  const heading = (title ?? "").trim() || t("Untitled chat");
-  blocks.push(`# ${heading}`);
-
-  // Metadata bullet list. Total tokens is only shown when there is a sum.
-  const totalTokens = rows.reduce((sum, row) => {
-    const usage = row.metadata?.usage;
-    return usage ? sum + rowTokens(usage) : sum;
-  }, 0);
-  const meta = [
-    `- Chat ID: \`${chatId}\``,
-    `- Exported: ${new Date().toISOString()}`,
-    `- Messages: ${rows.length}`,
-  ];
-  if (totalTokens > 0) meta.push(`- Total tokens: ${totalTokens}`);
-  blocks.push(meta.join("\n"));
-
-  rows.forEach((row, index) => {
-    blocks.push("---");
-
-    const roleLabel = row.role === "assistant" ? t("AI agent") : t("You");
-    blocks.push(`## ${index + 1}. ${roleLabel}`);
-
-    // Created-at kept in source as an HTML comment (out of the rendered prose).
-    blocks.push(`<!-- ${row.createdAt} -->`);
-
-    // Resolve parts: prefer the rich persisted parts, else a single text part
-    // built from the plain-text content (mirrors `rowToUiMessage`).
-    const parts: TextLikePart[] =
-      Array.isArray(row.metadata?.parts) && row.metadata.parts.length > 0
-        ? (row.metadata.parts as TextLikePart[])
-        : [{ type: "text", text: row.content ?? "" }];
-
-    for (const part of parts) {
-      if (part.type === "text") {
-        const text = (part.text ?? "").trim();
-        // Skip empty/whitespace-only text parts (matches MessageItem).
-        if (text.length > 0) blocks.push(text);
-        continue;
-      }
-
-      const isToolPart =
-        part.type.startsWith("tool-") || part.type === "dynamic-tool";
-      if (!isToolPart) continue;
-
-      const tp = part as unknown as ToolUiPart;
-      const name = getToolName(tp);
-      const { key, values } = toolLabelKey(name);
-      const label = t(key, values);
-      const state = toolRunState(tp.state);
-
-      const toolLines: string[] = [
-        `**Tool: ${label}** (\`${name}\`) — ${state}`,
-      ];
-      if (tp.input !== undefined) {
-        toolLines.push("Input:");
-        toolLines.push(fence(stringify(tp.input), "json"));
-      }
-      if (tp.output !== undefined) {
-        toolLines.push("Output:");
-        toolLines.push(fence(stringify(tp.output), "json"));
-      }
-      if (tp.errorText) {
-        toolLines.push(`**Error:** ${tp.errorText}`);
-      }
-      blocks.push(toolLines.join("\n\n"));
-    }
-
-    if (row.metadata?.error) {
-      blocks.push(`**⚠️ Error:** ${row.metadata.error}`);
-    }
-
-    const usage = row.metadata?.usage;
-    if (usage) {
-      const total = usage.totalTokens ?? rowTokens(usage);
-      blocks.push(
-        `_Tokens — in: ${usage.inputTokens ?? "?"}, out: ${usage.outputTokens ?? "?"}, total: ${total}_`,
-      );
-    }
-  });
-
-  // Blank line between blocks so the Markdown renders cleanly.
-  return blocks.join("\n\n");
-}

apps/client/src/features/ai-chat/utils/collapse-blank-lines.test.ts

@@ -0,0 +1,61 @@
+import { describe, it, expect } from "vitest";
+import { collapseBlankLines } from "@/features/ai-chat/utils/collapse-blank-lines.ts";
+import { renderChatMarkdown } from "@/features/ai-chat/utils/markdown.ts";
+
+describe("collapseBlankLines", () => {
+  it("collapses a run of 2+ newlines to a single newline", () => {
+    expect(collapseBlankLines("a\n\nb")).toBe("a\nb");
+    expect(collapseBlankLines("a\n\n\n\nb")).toBe("a\nb");
+  });
+
+  it("keeps single newlines untouched", () => {
+    expect(collapseBlankLines("a\nb\nc")).toBe("a\nb\nc");
+  });
+
+  it("preserves blank lines INSIDE a fenced code block", () => {
+    const src = "a\n\n\nb\n\n```\nx\n\n\ny\n```\n\nc";
+    // Prose blanks collapse; the blank lines between the ``` fences survive.
+    expect(collapseBlankLines(src)).toBe("a\nb\n```\nx\n\n\ny\n```\nc");
+  });
+
+  it("handles a tilde fence and preserves its interior blanks", () => {
+    const src = "p\n\n~~~\ncode\n\nmore\n~~~\n\nq";
+    expect(collapseBlankLines(src)).toBe("p\n~~~\ncode\n\nmore\n~~~\nq");
+  });
+
+  it("leaves an unclosed fence's remaining lines verbatim", () => {
+    const src = "intro\n\n```\nstill\n\nopen";
+    expect(collapseBlankLines(src)).toBe("intro\n```\nstill\n\nopen");
+  });
+
+  it("is a no-op for text with no blank lines", () => {
+    expect(collapseBlankLines("just one line")).toBe("just one line");
+  });
+});
+
+describe("collapseBlankLines + renderChatMarkdown (tight reasoning rendering)", () => {
+  it("renders a blank-line-separated list as a TIGHT list (no <li><p>)", () => {
+    const loose =
+      "Intro paragraph.\n\n- item one\n\n- item two\n\n- item three";
+    const html = renderChatMarkdown(collapseBlankLines(loose), {});
+    // Tight list: each <li> holds the text directly, not wrapped in a <p>.
+    expect(html).toContain("<li>item one</li>");
+    expect(html).not.toContain("<li><p>");
+    // The list still parses as a list after the paragraph (not a paragraph+<br>).
+    expect(html).toContain("<ul>");
+    expect(html).toContain("<p>Intro paragraph.</p>");
+  });
+
+  it("renders an ordered list (1. 2.) as tight after collapsing", () => {
+    const loose = "Intro.\n\n1. first\n\n2. second";
+    const html = renderChatMarkdown(collapseBlankLines(loose), {});
+    expect(html).toContain("<ol>");
+    expect(html).toContain("<li>first</li>");
+    expect(html).not.toContain("<li><p>");
+  });
+
+  it("the loose source WOULD render <li><p> without collapsing (control)", () => {
+    const loose = "- a\n\n- b";
+    expect(renderChatMarkdown(loose, {})).toContain("<li><p>");
+  });
+});

apps/client/src/features/ai-chat/utils/collapse-blank-lines.ts

@@ -0,0 +1,56 @@
+// Pure helper for compact reasoning ("Thinking") rendering. Kept free of React
+// so it can be unit-tested in isolation (see collapse-blank-lines.test.ts).
+
+/**
+ * Collapse runs of 2+ newlines down to a single newline, EXCEPT inside fenced
+ * code blocks (``` ... ``` or ~~~ ... ~~~), where blank lines are significant.
+ *
+ * Why: reasoning models emit thinking with a blank line (`\n\n`) between every
+ * list item and paragraph. `marked` turns those into "loose" lists (each `<li>`
+ * wrapped in a `<p>`) and separate `<p>` paragraphs, each carrying a vertical
+ * margin — so the "Thinking" block renders with large, airy gaps. Removing the
+ * blank-line gaps yields tight lists (no `<li><p>`) and joined paragraphs. The
+ * chat markdown renderer runs with `breaks: true`, so a single `\n` still
+ * becomes a `<br>` — line breaks inside the reasoning are preserved; only the
+ * empty gaps between blocks disappear. Apply ONLY to reasoning text, never to a
+ * normal assistant answer (where paragraph spacing is intentional).
+ *
+ * Fenced code is preserved verbatim: a fence opens on a line whose first
+ * non-space characters are ``` or ~~~ and closes on the next line that starts
+ * with the same fence character. Blank lines between fences (significant for
+ * code formatting) are never collapsed.
+ */
+export function collapseBlankLines(text: string): string {
+  const lines = text.split("\n");
+  const out: string[] = [];
+  let inFence = false;
+  let fenceChar = "";
+
+  for (const line of lines) {
+    const fenceMatch = line.match(/^\s*(`{3,}|~{3,})/);
+    if (fenceMatch) {
+      const ch = fenceMatch[1][0];
+      if (!inFence) {
+        inFence = true;
+        fenceChar = ch;
+      } else if (ch === fenceChar) {
+        inFence = false;
+      }
+      out.push(line);
+      continue;
+    }
+
+    // Inside a fenced block every line (including blanks) is significant.
+    if (inFence) {
+      out.push(line);
+      continue;
+    }
+
+    // Outside fences: drop blank lines so a `\n\n+` gap collapses to a single
+    // `\n` between the surrounding content lines.
+    if (line.trim() === "") continue;
+    out.push(line);
+  }
+
+  return out.join("\n");
+}

apps/client/src/features/ai-chat/utils/count-stream-tokens.test.ts

@@ -0,0 +1,171 @@
+import { describe, expect, it } from "vitest";
+import type { UIMessage } from "@ai-sdk/react";
+import {
+  estimateTokens,
+  liveTurnTokens,
+} from "@/features/ai-chat/utils/count-stream-tokens.ts";
+
+const msg = (parts: unknown[], metadata?: unknown): UIMessage =>
+  ({
+    id: Math.random().toString(),
+    role: "assistant",
+    parts,
+    metadata,
+  }) as UIMessage;
+
+describe("estimateTokens", () => {
+  it("returns 0 for the empty string", () => {
+    expect(estimateTokens("")).toBe(0);
+  });
+
+  it("ceils chars/4 so any non-empty text is at least 1 token", () => {
+    expect(estimateTokens("a")).toBe(1);
+    expect(estimateTokens("abcd")).toBe(1);
+    expect(estimateTokens("abcde")).toBe(2);
+    expect(estimateTokens("12345678")).toBe(2);
+  });
+});
+
+describe("liveTurnTokens — estimate path", () => {
+  it("is all zeros for an undefined message", () => {
+    expect(liveTurnTokens(undefined)).toEqual({
+      reasoning: 0,
+      output: 0,
+      authoritative: false,
+    });
+  });
+
+  it("is all zeros for a parts-less message", () => {
+    expect(liveTurnTokens({ id: "x", role: "assistant" } as UIMessage)).toEqual({
+      reasoning: 0,
+      output: 0,
+      authoritative: false,
+    });
+  });
+
+  it("estimates output from text parts", () => {
+    // 8 chars -> 2 tokens.
+    const r = liveTurnTokens(msg([{ type: "text", text: "12345678" }]));
+    expect(r).toEqual({ reasoning: 0, output: 2, authoritative: false });
+  });
+
+  it("estimates reasoning from reasoning parts (kept separate from output)", () => {
+    const r = liveTurnTokens(
+      msg([
+        { type: "reasoning", text: "12345678" },
+        { type: "text", text: "abcd" },
+      ]),
+    );
+    expect(r).toEqual({ reasoning: 2, output: 1, authoritative: false });
+  });
+
+  it("accumulates across multiple text + reasoning parts (multi-step)", () => {
+    const r = liveTurnTokens(
+      msg([
+        { type: "reasoning", text: "abcd" }, // 1
+        { type: "text", text: "abcd" }, // 1
+        { type: "tool-getPage", state: "output-available" }, // ignored
+        { type: "reasoning", text: "abcd" }, // 1
+        { type: "text", text: "abcdefgh" }, // 2
+      ]),
+    );
+    expect(r).toEqual({ reasoning: 2, output: 3, authoritative: false });
+  });
+
+  it("ignores non text/reasoning parts (tools, step-start)", () => {
+    const r = liveTurnTokens(
+      msg([
+        { type: "step-start" },
+        { type: "tool-getPage", state: "input-available" },
+      ]),
+    );
+    expect(r).toEqual({ reasoning: 0, output: 0, authoritative: false });
+  });
+});
+
+describe("liveTurnTokens — authoritative path", () => {
+  it("returns authoritative usage verbatim, splitting reasoning out of output", () => {
+    // outputTokens INCLUDES reasoning in the AI SDK shape -> answer = 100 - 30.
+    const r = liveTurnTokens(
+      msg([{ type: "text", text: "estimate would be tiny" }], {
+        usage: { inputTokens: 500, outputTokens: 100, reasoningTokens: 30 },
+      }),
+    );
+    expect(r).toEqual({ reasoning: 30, output: 70, authoritative: true });
+  });
+
+  it("treats missing reasoningTokens as 0 and keeps full output", () => {
+    const r = liveTurnTokens(
+      msg([{ type: "text", text: "x" }], {
+        usage: { inputTokens: 10, outputTokens: 42 },
+      }),
+    );
+    expect(r).toEqual({ reasoning: 0, output: 42, authoritative: true });
+  });
+
+  it("never returns a negative output when reasoning exceeds reported output", () => {
+    const r = liveTurnTokens(
+      msg([], { usage: { outputTokens: 10, reasoningTokens: 40 } }),
+    );
+    expect(r).toEqual({ reasoning: 40, output: 0, authoritative: true });
+  });
+
+  it("falls back to the estimate when metadata has no usage object", () => {
+    const r = liveTurnTokens(
+      msg([{ type: "text", text: "abcd" }], { chatId: "c1" }),
+    );
+    expect(r).toEqual({ reasoning: 0, output: 1, authoritative: false });
+  });
+});
+
+describe("liveTurnTokens — combined authoritative + estimate (#163)", () => {
+  it("ticks the in-flight step above the completed-steps authoritative base", () => {
+    // The authoritative usage is the sum over COMPLETED steps (step 1). The
+    // CURRENT step is streaming and its text is NOT in `usage` yet, but it IS in
+    // the parts -> the running estimate must push the live figure above the base
+    // so the badge keeps growing between step boundaries.
+    const longText = "x".repeat(800); // 800 chars -> 200 est output tokens
+    const r = liveTurnTokens(
+      msg([{ type: "text", text: longText }], {
+        usage: { inputTokens: 500, outputTokens: 40 }, // step-1 base: 40 output
+      }),
+    );
+    // max(authOutput=40, estOutput=200) = 200 -> the counter ticks, not frozen.
+    expect(r.output).toBe(200);
+    expect(r.authoritative).toBe(true);
+  });
+
+  it("ticks reasoning of the in-flight step above the authoritative reasoning base", () => {
+    const longReasoning = "r".repeat(400); // 400 chars -> 100 est reasoning
+    const r = liveTurnTokens(
+      msg([{ type: "reasoning", text: longReasoning }], {
+        usage: { inputTokens: 100, outputTokens: 20, reasoningTokens: 20 },
+      }),
+    );
+    // reasoning: max(20, 100) = 100 ; output: max(max(0,20-20)=0, 0) = 0.
+    expect(r.reasoning).toBe(100);
+    expect(r.output).toBe(0);
+    expect(r.authoritative).toBe(true);
+  });
+
+  it("snaps to the authoritative figure once it exceeds the rough estimate", () => {
+    // Short on-screen text (estimate tiny) but a large authoritative output:
+    // the exact figure wins at the boundary (the counter never under-reports).
+    const r = liveTurnTokens(
+      msg([{ type: "text", text: "abcd" }], {
+        usage: { inputTokens: 10, outputTokens: 5000 },
+      }),
+    );
+    expect(r.output).toBe(5000);
+  });
+
+  it("is monotonic: max never drops below the authoritative base when the estimate is smaller", () => {
+    // Mirrors the legacy 'verbatim' tests: estimate < authoritative -> unchanged.
+    const r = liveTurnTokens(
+      msg([{ type: "text", text: "tiny" }], {
+        usage: { inputTokens: 500, outputTokens: 100, reasoningTokens: 30 },
+      }),
+    );
+    expect(r).toEqual({ reasoning: 30, output: 70, authoritative: true });
+  });
+});

apps/client/src/features/ai-chat/utils/count-stream-tokens.ts

@@ -0,0 +1,113 @@
+import type { UIMessage } from "@ai-sdk/react";
+
+/**
+ * Live token counting for a streaming AI-chat turn — split into REASONING
+ * (thinking) and OUTPUT (answer) tokens, mirroring how Claude Code shows
+ * `Thinking… · 60 tokens` next to its thinking indicator.
+ *
+ * No provider streams exact per-token usage mid-stream, so the live number is a
+ * CLIENT ESTIMATE (chars/≈4 heuristic) that is reconciled to AUTHORITATIVE usage
+ * once the server attaches it on a step/turn boundary (see the server's
+ * `chatStreamMetadata` + the client's read of `message.metadata.usage`). When
+ * authoritative usage is present we return it verbatim (the number "jumps to
+ * exact"); otherwise we return the running estimate. Pure + unit-testable: it
+ * never runs a real BPE tokenizer (that would be O(n²) on the hot path, bloat the
+ * bundle, and be wrong for Gemini/Ollama anyway).
+ */
+
+/**
+ * Rough token estimate for a piece of text using the standard chars/≈4 heuristic.
+ * Returns 0 for empty/whitespace-free-of-content input, and ceils so any
+ * non-empty text counts as at least one token.
+ */
+export function estimateTokens(text: string): number {
+  if (!text) return 0;
+  return Math.ceil(text.length / 4);
+}
+
+/** Authoritative per-step/turn usage the server attaches to message metadata. */
+export interface AuthoritativeUsage {
+  inputTokens?: number;
+  outputTokens?: number;
+  totalTokens?: number;
+  reasoningTokens?: number;
+}
+
+/** Live token split for a turn's tail (streaming) assistant message. */
+export interface LiveTurnTokens {
+  /** Thinking/reasoning tokens (estimate, or authoritative when available). */
+  reasoning: number;
+  /** Answer/output tokens (estimate, or authoritative when available). */
+  output: number;
+  /** True when the numbers come from authoritative server usage, not estimate. */
+  authoritative: boolean;
+}
+
+/** Read the authoritative usage off a UIMessage's metadata, if the server set it. */
+function metadataUsage(message: UIMessage): AuthoritativeUsage | undefined {
+  const meta = message?.metadata as
+    | { usage?: AuthoritativeUsage }
+    | undefined;
+  const usage = meta?.usage;
+  if (!usage || typeof usage !== "object") return undefined;
+  return usage;
+}
+
+/**
+ * Token split for the given (streaming) assistant message.
+ *
+ * COMBINES the authoritative server usage with the running text estimate so the
+ * counter ticks in real time AND lands exact. The server only attaches
+ * `metadata.usage` at a step/turn boundary (`finish-step`/`finish`) and it is
+ * CUMULATIVE over COMPLETED steps — it does NOT yet include the in-flight step.
+ * So a multi-step turn that returned the authoritative figure verbatim would
+ * FREEZE between boundaries and jump in steps (issue #163).
+ *
+ * Instead we always compute the running ESTIMATE (chars/≈4 over the message's
+ * `reasoning`/`text` parts, which grows on every streamed delta) and take the
+ * per-component MAX of the authoritative base and the estimate:
+ *   - between boundaries the estimate of the in-flight step ticks the number up;
+ *   - at a boundary the authoritative figure snaps it to exact;
+ *   - because the server's usage is cumulative and we only ever take the max, the
+ *     number is MONOTONIC — it never drops.
+ *
+ * Providers that don't stream reasoning text still surface a reasoning count once
+ * the authoritative usage arrives (`max(reasoningTokens, 0)`); on the pure
+ * estimate path (no usage yet) such a turn shows `reasoning: 0` until then.
+ */
+export function liveTurnTokens(message: UIMessage | undefined): LiveTurnTokens {
+  if (!message) return { reasoning: 0, output: 0, authoritative: false };
+
+  // Running ESTIMATE over every reasoning/text part — grows on each delta. This
+  // includes the IN-FLIGHT step, which the authoritative usage does not cover yet.
+  let estReasoning = 0;
+  let estOutput = 0;
+  for (const part of message.parts ?? []) {
+    if (part.type === "reasoning") {
+      estReasoning += estimateTokens((part as { text?: string }).text ?? "");
+    } else if (part.type === "text") {
+      estOutput += estimateTokens((part as { text?: string }).text ?? "");
+    }
+  }
+
+  const usage = metadataUsage(message);
+  if (!usage) {
+    // No authoritative usage streamed yet: the estimate IS the live figure.
+    return { reasoning: estReasoning, output: estOutput, authoritative: false };
+  }
+
+  // Authoritative sum over COMPLETED steps. `outputTokens` already INCLUDES
+  // reasoning in the AI SDK usage shape, so subtract it out for the "answer"
+  // figure (never go negative if a provider reports them inconsistently).
+  const authReasoning = usage.reasoningTokens ?? 0;
+  const authOutput = Math.max(0, (usage.outputTokens ?? 0) - authReasoning);
+
+  // Per-component max: the in-flight step's estimate ticks above the completed-
+  // steps base between boundaries, and the authoritative figure wins once it
+  // exceeds the (rough) estimate at the next boundary. Monotonic by construction.
+  return {
+    reasoning: Math.max(authReasoning, estReasoning),
+    output: Math.max(authOutput, estOutput),
+    authoritative: true,
+  };
+}

apps/client/src/features/ai-chat/utils/message-content.test.ts

@@ -0,0 +1,94 @@
+import { describe, expect, it } from "vitest";
+import type { UIMessage } from "@ai-sdk/react";
+import { assistantMessageHasVisibleContent } from "@/features/ai-chat/utils/message-content.ts";
+
+/**
+ * Pure-helper tests for `assistantMessageHasVisibleContent`, the single source of
+ * truth shared by MessageItem (whether to render the bubble) and
+ * typingIndicatorShowsName (whether the standalone indicator owns the name). It
+ * must mirror MessageItem's render decisions exactly so exactly one element owns
+ * the agent name during the pre-content "thinking" gap.
+ */
+const msg = (
+  parts: UIMessage["parts"],
+  metadata?: unknown,
+): UIMessage =>
+  ({
+    id: Math.random().toString(),
+    role: "assistant",
+    parts,
+    metadata,
+  }) as UIMessage;
+
+describe("assistantMessageHasVisibleContent", () => {
+  it("is false for an empty text part", () => {
+    expect(assistantMessageHasVisibleContent(msg([{ type: "text", text: "" }]))).toBe(false);
+  });
+
+  it("is false for a whitespace-only text part", () => {
+    expect(assistantMessageHasVisibleContent(msg([{ type: "text", text: "   " }]))).toBe(false);
+  });
+
+  it("is true for a non-empty text part", () => {
+    expect(assistantMessageHasVisibleContent(msg([{ type: "text", text: "answer" }]))).toBe(true);
+  });
+
+  it("is true for a tool part", () => {
+    const toolPart = { type: "tool-getPage", state: "output-available" } as unknown as UIMessage["parts"][number];
+    expect(assistantMessageHasVisibleContent(msg([toolPart]))).toBe(true);
+  });
+
+  it("is true when metadata.error is set (persisted error banner)", () => {
+    expect(
+      assistantMessageHasVisibleContent(msg([{ type: "text", text: "" }], { error: "boom" })),
+    ).toBe(true);
+  });
+
+  it("is true when metadata.finishReason is 'aborted' (persisted stopped notice)", () => {
+    expect(
+      assistantMessageHasVisibleContent(msg([], { finishReason: "aborted" })),
+    ).toBe(true);
+  });
+
+  it("is false for a message with no parts and no metadata", () => {
+    expect(assistantMessageHasVisibleContent(msg([]))).toBe(false);
+  });
+
+  it("is false for an unsupported part kind (reasoning)", () => {
+    const reasoning = { type: "reasoning", text: "let me think" } as unknown as UIMessage["parts"][number];
+    expect(assistantMessageHasVisibleContent(msg([reasoning]))).toBe(false);
+  });
+
+  it("is true for a running tool part (input-available)", () => {
+    // Tool visibility does not depend on tool state: MessageItem renders a
+    // ToolCallCard for any tool part, so a still-running tool is visible.
+    const runningTool = { type: "tool-getPage", state: "input-available" } as unknown as UIMessage["parts"][number];
+    expect(assistantMessageHasVisibleContent(msg([runningTool]))).toBe(true);
+  });
+
+  it("is true for an empty leading text part followed by a non-empty one", () => {
+    // An empty leading text part followed by a non-empty one is still visible
+    // (mirrors the real streaming sequence where text arrives incrementally).
+    expect(
+      assistantMessageHasVisibleContent(
+        msg([{ type: "text", text: "" }, { type: "text", text: "answer" }]),
+      ),
+    ).toBe(true);
+  });
+
+  it("is false for an empty completed turn (finishReason 'stop')", () => {
+    // A completed turn with no text/tools and a non-aborted finishReason renders
+    // nothing — this is intentional (hiding a dangling name-only row), distinct
+    // from the `aborted`/`error` cases which DO render.
+    expect(
+      assistantMessageHasVisibleContent(msg([{ type: "text", text: "" }], { finishReason: "stop" })),
+    ).toBe(false);
+  });
+
+  it("is false for a parts-less message (the `?? []` guard makes it safe)", () => {
+    // The `?? []` guard makes a parts-less object safe instead of throwing.
+    expect(
+      assistantMessageHasVisibleContent({ id: "x", role: "assistant" } as unknown as UIMessage),
+    ).toBe(false);
+  });
+});

apps/client/src/features/ai-chat/utils/message-content.ts

@@ -0,0 +1,39 @@
+import type { UIMessage } from "@ai-sdk/react";
+import { isToolPart } from "@/features/ai-chat/utils/tool-parts.tsx";
+
+/**
+ * Whether an assistant `UIMessage` has anything visible to render in its bubble.
+ *
+ * This mirrors MessageItem's render decisions EXACTLY and is the single source of
+ * truth shared by both MessageItem (to decide whether to render the bubble at all)
+ * and typingIndicatorShowsName (to decide whether the standalone "Thinking…"
+ * indicator owns the dimmed agent-name label). Keeping one helper guarantees the
+ * two stay in lockstep, so exactly one element owns the name during the pre-content
+ * "thinking" gap and the layout never reflows mid-stream.
+ *
+ * An assistant message has visible content iff ANY of:
+ *  - a `text` part whose trimmed length > 0 (non-empty markdown), OR
+ *  - ANY tool part (`isToolPart(part.type)`), OR
+ *  - `metadata.error` is truthy (a persisted error banner renders), OR
+ *  - `metadata.finishReason === "aborted"` (a persisted "response stopped" notice).
+ * Empty/whitespace-only text parts and unsupported part kinds (reasoning, sources,
+ * files, step-start) are NOT visible.
+ */
+export function assistantMessageHasVisibleContent(message: UIMessage): boolean {
+  const meta = message.metadata as
+    | { error?: string; finishReason?: string }
+    | undefined;
+  // Persisted errored/aborted turns always render their banner/notice.
+  if (meta?.error) return true;
+  if (meta?.finishReason === "aborted") return true;
+
+  // `parts` may be empty (a nascent streaming message has no parts yet).
+  // `?? []` also guards a sparse/partial message object (metadata-only, no
+  // `parts`) so iterating cannot throw — it does not change behavior for any
+  // current input.
+  for (const part of message.parts ?? []) {
+    if (part.type === "text" && part.text.trim().length > 0) return true;
+    if (isToolPart(part.type)) return true;
+  }
+  return false;
+}

apps/client/src/features/ai-chat/utils/reasoning-tokens.test.ts

@@ -0,0 +1,56 @@
+import { describe, expect, it } from "vitest";
+import type { UIMessage } from "@ai-sdk/react";
+import { reasoningTokensForPart } from "@/features/ai-chat/utils/reasoning-tokens.ts";
+
+/**
+ * Pure-helper tests for `reasoningTokensForPart`, the #151 anti-double-count
+ * rule: the authoritative `usage.reasoningTokens` is the TURN TOTAL, so it may
+ * only be attributed when the turn has exactly one reasoning part. With multiple
+ * reasoning parts (or no authoritative usage) every part falls back to its own
+ * per-part estimate, signalled here by `undefined`.
+ */
+const msg = (
+  parts: UIMessage["parts"],
+  metadata?: unknown,
+): UIMessage =>
+  ({
+    id: Math.random().toString(),
+    role: "assistant",
+    parts,
+    metadata,
+  }) as UIMessage;
+
+describe("reasoningTokensForPart", () => {
+  it("single reasoning part -> the authoritative turn total", () => {
+    const m = msg(
+      [
+        { type: "reasoning", text: "thinking…" } as never,
+        { type: "text", text: "answer" },
+      ],
+      { usage: { reasoningTokens: 42 } },
+    );
+    expect(reasoningTokensForPart(m)).toBe(42);
+  });
+
+  it("multiple reasoning parts -> undefined (each estimates on its own)", () => {
+    const m = msg(
+      [
+        { type: "reasoning", text: "step one" } as never,
+        { type: "reasoning", text: "step two" } as never,
+        { type: "text", text: "answer" },
+      ],
+      { usage: { reasoningTokens: 99 } },
+    );
+    // Even with an authoritative total, two reasoning parts must each estimate
+    // (attributing the total to one would double-count against the other).
+    expect(reasoningTokensForPart(m)).toBeUndefined();
+  });
+
+  it("no authoritative usage -> undefined even for a single reasoning part", () => {
+    const m = msg([
+      { type: "reasoning", text: "thinking…" } as never,
+      { type: "text", text: "answer" },
+    ]);
+    expect(reasoningTokensForPart(m)).toBeUndefined();
+  });
+});

apps/client/src/features/ai-chat/utils/reasoning-tokens.ts

@@ -0,0 +1,34 @@
+import type { UIMessage } from "@ai-sdk/react";
+
+/**
+ * Decide the authoritative reasoning token count to attribute to a single
+ * `reasoning` part of an assistant message — or `undefined` when the part should
+ * fall back to its own per-part estimate.
+ *
+ * `usage.reasoningTokens` is the TURN TOTAL, so it may only be attributed to a
+ * block when the turn has exactly ONE reasoning part (the common one-step turn):
+ * then that block can show the exact figure. With MULTIPLE reasoning parts (a
+ * multi-step agent turn) every block must fall back to its own estimate —
+ * attributing the turn total to one of them would double-count against the
+ * others' estimates (#151 review anti-double-count rule). When there is no
+ * authoritative usage at all, every part estimates.
+ *
+ * Returns the authoritative `reasoningTokens` only for the single-reasoning-part
+ * case; `undefined` otherwise (the caller estimates from the part text).
+ */
+export function reasoningTokensForPart(
+  message: UIMessage,
+): number | undefined {
+  const reasoningTokens = (
+    message.metadata as { usage?: { reasoningTokens?: number } } | undefined
+  )?.usage?.reasoningTokens;
+
+  const reasoningPartCount = (message.parts ?? []).reduce(
+    (acc, p) => (p.type === "reasoning" ? acc + 1 : acc),
+    0,
+  );
+
+  // Exactly one reasoning part -> attribute the authoritative turn total to it.
+  // Otherwise (zero or multiple) each part estimates on its own.
+  return reasoningPartCount === 1 ? reasoningTokens : undefined;
+}

apps/client/src/features/ai-chat/utils/role-launch.test.ts

@@ -0,0 +1,72 @@
+import { describe, it, expect } from "vitest";
+import { roleLaunchMessage, shouldResetRolePicked } from "./role-launch.ts";
+
+const DEFAULT = "Take a look at the current document";
+
+// Covers the three-way handleRolePick behavior (issue #149) without mounting the
+// chat-thread component — the logic lives in these pure helpers.
+describe("roleLaunchMessage", () => {
+  it("autoStart=true + custom launchMessage -> the trimmed custom text", () => {
+    expect(
+      roleLaunchMessage(
+        { autoStart: true, launchMessage: "  Draft a plan  " },
+        DEFAULT,
+      ),
+    ).toBe("Draft a plan");
+  });
+
+  it("autoStart=true + empty launchMessage -> the default fallback", () => {
+    expect(
+      roleLaunchMessage({ autoStart: true, launchMessage: "" }, DEFAULT),
+    ).toBe(DEFAULT);
+  });
+
+  it("autoStart=true + whitespace-only launchMessage -> the default fallback", () => {
+    expect(
+      roleLaunchMessage({ autoStart: true, launchMessage: "   " }, DEFAULT),
+    ).toBe(DEFAULT);
+  });
+
+  it("autoStart=true + null launchMessage -> the default fallback", () => {
+    expect(
+      roleLaunchMessage({ autoStart: true, launchMessage: null }, DEFAULT),
+    ).toBe(DEFAULT);
+  });
+
+  it("autoStart=false -> null (bind only, send nothing) regardless of message", () => {
+    expect(
+      roleLaunchMessage(
+        { autoStart: false, launchMessage: "ignored" },
+        DEFAULT,
+      ),
+    ).toBeNull();
+    expect(
+      roleLaunchMessage({ autoStart: false, launchMessage: null }, DEFAULT),
+    ).toBeNull();
+  });
+});
+
+// Regression guard for #149: the "picked, not sent" flag must reset when the
+// user starts a fresh chat after an autoStart=false pick. On pre-fix code there
+// was no reset, so the flag stayed stuck and the role cards never returned —
+// this is exactly the `true` case below (which the old code never acted on).
+describe("shouldResetRolePicked", () => {
+  it("resets when the thread is empty and the bound role was cleared (New chat)", () => {
+    // chatId still null, roleId cleared by the parent, flag stuck -> reset.
+    expect(shouldResetRolePicked(null, null, true)).toBe(true);
+    expect(shouldResetRolePicked(null, undefined, true)).toBe(true);
+  });
+
+  it("does NOT reset while a role is still bound (cards stay hidden, composer shown)", () => {
+    // Right after the autoStart=false pick, roleId is the picked role -> keep hidden.
+    expect(shouldResetRolePicked(null, "role-1", true)).toBe(false);
+  });
+
+  it("does NOT reset once the chat exists (a message was sent / chat created)", () => {
+    expect(shouldResetRolePicked("chat-1", null, true)).toBe(false);
+  });
+
+  it("is a no-op when the flag is already false", () => {
+    expect(shouldResetRolePicked(null, null, false)).toBe(false);
+  });
+});

apps/client/src/features/ai-chat/utils/role-launch.ts

@@ -0,0 +1,34 @@
+import type { IAiRole } from "@/features/ai-chat/types/ai-chat.types.ts";
+
+/**
+ * Decide what (if anything) to auto-send when an agent role card is picked
+ * (issue #149). Extracted as a pure function so the three-way behavior is
+ * unit-testable without mounting the chat-thread component:
+ *   - autoStart=false              -> null  (bind the role only, send nothing)
+ *   - autoStart=true + message     -> the trimmed custom launchMessage
+ *   - autoStart=true + empty/null  -> the default fallback text
+ */
+export function roleLaunchMessage(
+  role: Pick<IAiRole, "autoStart" | "launchMessage">,
+  defaultText: string,
+): string | null {
+  if (!role.autoStart) return null;
+  return role.launchMessage?.trim() || defaultText;
+}
+
+/**
+ * Whether the "role picked but nothing sent yet" flag (`rolePickedNoSend`)
+ * should reset to false. After an autoStart=false pick the thread shows the
+ * composer with chatId still null; when the user then starts a fresh chat the
+ * parent clears the bound role (roleId -> null) but chatId stays null, so the
+ * thread never remounts and the flag would otherwise stay set — hiding the role
+ * cards forever. Reset exactly in that state; a still-bound role (roleId set)
+ * keeps the cards hidden. (Regression guard for #149.)
+ */
+export function shouldResetRolePicked(
+  chatId: string | null,
+  roleId: string | null | undefined,
+  rolePickedNoSend: boolean,
+): boolean {
+  return chatId === null && roleId == null && rolePickedNoSend;
+}

apps/client/src/features/ai-chat/utils/thread-identity.test.ts

@@ -0,0 +1,79 @@
+import { describe, it, expect } from "vitest";
+import {
+  newThread,
+  switchThread,
+  adoptThread,
+  threadSessionReducer,
+} from "./thread-identity";
+
+describe("newThread", () => {
+  it("uses the supplied key and has no chat id yet", () => {
+    expect(newThread("new-abc")).toEqual({ key: "new-abc", chatId: null });
+  });
+});
+
+describe("switchThread", () => {
+  it("switches to an existing chat: key becomes the chat id", () => {
+    expect(switchThread("chat-1")).toEqual({
+      key: "chat-1",
+      chatId: "chat-1",
+    });
+  });
+});
+
+describe("adoptThread", () => {
+  // Key UNCHANGED (no remount) + chatId moved null->realId. The unchanged key is
+  // what keeps the live useChat store alive; the matching chatId is what makes the
+  // window's render-phase reconciler (activeChatId !== thread.chatId) treat the
+  // adopted thread as already-in-sync rather than a switch.
+  it("adopts in place for a new chat: keeps the key, sets the chat id", () => {
+    const prev = newThread("new-abc");
+    expect(adoptThread(prev, "chat-1")).toEqual({
+      key: "new-abc",
+      chatId: "chat-1",
+    });
+  });
+
+  it("is a no-op for an already-persisted chat", () => {
+    const prev: { key: string; chatId: string | null } = {
+      key: "chat-1",
+      chatId: "chat-1",
+    };
+    expect(adoptThread(prev, "chat-2")).toBe(prev);
+  });
+});
+
+describe("threadSessionReducer", () => {
+  it("reconcile to an existing id switches (key becomes the id)", () => {
+    const next = threadSessionReducer(newThread("new-abc"), {
+      type: "reconcile",
+      chatId: "chat-1",
+      newKey: "new-xyz",
+    });
+    expect(next).toEqual({ key: "chat-1", chatId: "chat-1" });
+  });
+
+  it("reconcile to null starts a fresh new thread with the supplied key", () => {
+    const next = threadSessionReducer(switchThread("chat-1"), {
+      type: "reconcile",
+      chatId: null,
+      newKey: "new-xyz",
+    });
+    expect(next).toEqual({ key: "new-xyz", chatId: null });
+  });
+
+  it("adopt on a new thread keeps the key and sets the id", () => {
+    const next = threadSessionReducer(newThread("new-abc"), {
+      type: "adopt",
+      chatId: "chat-1",
+    });
+    expect(next).toEqual({ key: "new-abc", chatId: "chat-1" });
+  });
+
+  it("adopt on a persisted thread is a no-op", () => {
+    const prev = switchThread("chat-1");
+    expect(threadSessionReducer(prev, { type: "adopt", chatId: "chat-2" })).toBe(
+      prev,
+    );
+  });
+});

apps/client/src/features/ai-chat/utils/thread-identity.ts

@@ -0,0 +1,73 @@
+/**
+ * Pure transitions for the AI-chat thread's identity: the single source of
+ * truth tying ChatThread's mount key to the chat id that mounted thread holds.
+ *
+ * The window keeps exactly ONE of these in state. Consolidating the mount key
+ * and the live thread's chat id into one atomic value makes the "stale chat id
+ * vs key" state unrepresentable: every change goes through one of the explicit
+ * transitions below, so the key and chatId can never silently diverge.
+ *
+ * - `newThread`/`switchThread` produce a key that forces a remount (+ reseed):
+ *   `newThread` for a brand-new (id-less) chat, `switchThread` for an existing
+ *   one. The caller picks which based on whether there is a chat id.
+ * - `adoptThread` keeps the SAME key so a brand-new chat learns its real id
+ *   WITHOUT remounting (the live useChat store, holding the just-finished turn,
+ *   is preserved and the next turn sends the real chatId).
+ *
+ * `newThread` takes the session key from the impure `generateId()` at the call
+ * site so these stay pure and unit-testable.
+ */
+export type ThreadIdentity = { key: string; chatId: string | null };
+
+/**
+ * A brand-new chat: a fresh session key and no chat id yet. `newKey` is
+ * supplied by the caller (generateId() is impure) so this stays pure/testable.
+ */
+export function newThread(newKey: string): ThreadIdentity {
+  return { key: newKey, chatId: null };
+}
+
+/**
+ * Switch to an EXISTING chat: the mount key becomes the chat id, forcing a
+ * remount + reseed from the persisted history. (A switch to a brand-new chat
+ * goes through `newThread` instead — there is no id to key on.)
+ */
+export function switchThread(chatId: string): ThreadIdentity {
+  return { key: chatId, chatId };
+}
+
+/**
+ * In-place adoption: a brand-new chat (`prev.chatId === null`) learns its real
+ * id WITHOUT remounting — keep the SAME key, set the chat id. If `prev` already
+ * has a chatId (not a new chat), this is a no-op (returns `prev`): adoption only
+ * applies to an as-yet-unadopted new thread.
+ */
+export function adoptThread(prev: ThreadIdentity, chatId: string): ThreadIdentity {
+  return prev.chatId === null ? { key: prev.key, chatId } : prev;
+}
+
+/**
+ * Thread-identity transitions as a reducer action. See `threadSessionReducer`.
+ */
+export type ThreadSessionAction =
+  | { type: "reconcile"; chatId: string | null; newKey: string }
+  | { type: "adopt"; chatId: string };
+
+/**
+ * Single source of truth for thread-identity transitions. `reconcile` handles a
+ * genuine switch (user OR external atom write) -> remount; `adopt` moves a brand-
+ * new chat to its real id in place (no remount).
+ */
+export function threadSessionReducer(
+  state: ThreadIdentity,
+  action: ThreadSessionAction,
+): ThreadIdentity {
+  switch (action.type) {
+    case "reconcile":
+      return action.chatId === null
+        ? newThread(action.newKey)
+        : switchThread(action.chatId);
+    case "adopt":
+      return adoptThread(state, action.chatId);
+  }
+}

apps/client/src/features/auth/components/invite-sign-up-form.tsx

@@ -10,9 +10,12 @@ import {
   PasswordInput,
   Box,
   Stack,
+  Group,
+  Text,
 } from "@mantine/core";
 import { zod4Resolver } from "mantine-form-zod-resolver";
-import { useParams, useSearchParams } from "react-router-dom";
+import { Link, useParams, useSearchParams } from "react-router-dom";
+import APP_ROUTE from "@/lib/app-route";
 import useAuth from "@/features/auth/hooks/use-auth";
 import classes from "@/features/auth/components/auth.module.css";
 import { useGetInvitationQuery } from "@/features/workspace/queries/workspace-query.ts";
@@ -58,7 +61,27 @@ export function InviteSignUpForm() {
   }
 
   if (isError) {
-    return <div>{t("invalid invitation link")}</div>;
+    // Styled error with a CTA to login, mirroring the password-reset
+    // error page and the 404 page (issue #133)
+    return (
+      <AuthLayout>
+        <Container my={40}>
+          <Text size="lg" ta="center">
+            {t("Invalid invitation link")}
+          </Text>
+          <Group justify="center">
+            <Button
+              component={Link}
+              to={APP_ROUTE.AUTH.LOGIN}
+              variant="subtle"
+              size="md"
+            >
+              {t("Go to login page")}
+            </Button>
+          </Group>
+        </Container>
+      </AuthLayout>
+    );
   }
 
   if (!invitation) {

apps/client/src/features/comment/components/comment-list-item.test.tsx

@@ -0,0 +1,59 @@
+import { describe, it, expect, vi } from "vitest";
+import { render, screen } from "@testing-library/react";
+import { MantineProvider } from "@mantine/core";
+import { IComment } from "@/features/comment/types/comment.types";
+
+// matchMedia (read by MantineProvider) is stubbed globally in vitest.setup.ts.
+
+// The comment mutation hooks reach out to react-query/network — stub them so the
+// component renders in isolation. We only assert the AI-badge rendering branch.
+vi.mock("@/features/comment/queries/comment-query", () => ({
+  useDeleteCommentMutation: () => ({ mutateAsync: vi.fn() }),
+  useResolveCommentMutation: () => ({ mutateAsync: vi.fn() }),
+  useUpdateCommentMutation: () => ({ mutateAsync: vi.fn() }),
+}));
+
+// CommentEditor pulls in the full TipTap editor stack; replace it with a stub.
+vi.mock("@/features/comment/components/comment-editor", () => ({
+  default: () => <div data-testid="comment-editor" />,
+}));
+
+import CommentListItem from "./comment-list-item";
+
+const baseComment = (over?: Partial<IComment>): IComment =>
+  ({
+    id: "c-1",
+    content: JSON.stringify({ type: "doc", content: [] }),
+    creatorId: "user-1",
+    pageId: "page-1",
+    workspaceId: "ws-1",
+    createdAt: new Date(),
+    creator: { id: "user-1", name: "Service Bot", avatarUrl: null } as any,
+    ...over,
+  }) as IComment;
+
+function renderItem(comment: IComment) {
+  return render(
+    <MantineProvider>
+      <CommentListItem comment={comment} pageId="page-1" canComment={true} />
+    </MantineProvider>,
+  );
+}
+
+describe("CommentListItem — AI badge", () => {
+  it('renders the AI-agent badge when createdSource === "agent"', () => {
+    renderItem(baseComment({ createdSource: "agent", aiChatId: null }));
+    expect(screen.getByText("AI-agent")).toBeDefined();
+    expect(screen.getByText("Service Bot")).toBeDefined();
+  });
+
+  it('does NOT render the badge for a normal user comment (createdSource "user")', () => {
+    renderItem(baseComment({ createdSource: "user" }));
+    expect(screen.queryByText("AI-agent")).toBeNull();
+    expect(screen.getByText("Service Bot")).toBeDefined();
+  });
+
+  // The non-clickable (null aiChatId) branch is a property of AiAgentBadge itself
+  // and is covered in ai-agent-badge.test.tsx; this integration suite only needs
+  // the insertion gate (agent → badge, user → no badge) above (#143 review).
+});

apps/client/src/features/comment/components/comment-list-item.tsx

@@ -1,4 +1,5 @@
-import { Group, Text, Box, Badge } from "@mantine/core";
+import { Group, Text, Box } from "@mantine/core";
+import { AiAgentBadge } from "@/components/ui/ai-agent-badge.tsx";
 import React, { useEffect, useRef, useState } from "react";
 import classes from "./comment.module.css";
 import { useAtom, useAtomValue } from "jotai";
@@ -126,9 +127,18 @@ function CommentListItem({
 
         <div style={{ flex: 1 }}>
           <Group justify="space-between" wrap="nowrap">
-            <Text size="xs" fw={500} lineClamp={1} lh={1.2}>
-              {comment.creator.name}
-            </Text>
+            <Group gap={6} wrap="nowrap" style={{ minWidth: 0 }}>
+              <Text size="xs" fw={500} lineClamp={1} lh={1.2}>
+                {comment.creator.name}
+              </Text>
+
+              {comment.createdSource === "agent" && (
+                <AiAgentBadge
+                  authorName={comment.creator?.name}
+                  aiChatId={comment.aiChatId}
+                />
+              )}
+            </Group>
 
             <div style={{ visibility: hovered ? "visible" : "hidden" }}>
               {!comment.parentCommentId && canComment && (

apps/client/src/features/comment/types/comment.types.ts

@@ -17,6 +17,13 @@ export interface IComment {
   deletedAt?: Date;
   creator: IUser;
   resolvedBy?: IUser;
+  // Agent-edit provenance (returned by the backend via selectAll('comments')).
+  // createdSource === "agent" marks a comment authored via an AI agent (MCP /
+  // internal AI chat); aiChatId deep-links to the internal chat when present
+  // (null for an external MCP agent); resolvedSource marks an AI-resolved thread.
+  createdSource?: string;
+  aiChatId?: string | null;
+  resolvedSource?: string | null;
   yjsSelection?: {
     anchor: any;
     head: any;

apps/client/src/features/dictation/utils/encode-wav.test.ts

@@ -0,0 +1,87 @@
+import { describe, it, expect } from "vitest";
+import { encodeWavPcm16 } from "./encode-wav";
+
+// Contract tests for `encodeWavPcm16` (encode-wav.ts). The dictation feature
+// streams microphone audio as mono 16-bit PCM WAV to the STT endpoint, which
+// whitelists audio/wav. A regression in the WAV header or PCM16 clamping would
+// produce audio the server cannot decode (silence / garbled transcripts), so we
+// assert the canonical 44-byte header layout and the sample quantisation rails.
+
+// Read a DataView back out of a Blob. jsdom's Blob does not implement
+// `.arrayBuffer()`, so go through FileReader.readAsArrayBuffer instead.
+function readView(blob: Blob): Promise<DataView> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => resolve(new DataView(reader.result as ArrayBuffer));
+    reader.onerror = () => reject(reader.error);
+    reader.readAsArrayBuffer(blob);
+  });
+}
+
+function readStr(view: DataView, offset: number, length: number): string {
+  let s = "";
+  for (let i = 0; i < length; i++) s += String.fromCharCode(view.getUint8(offset + i));
+  return s;
+}
+
+describe("encodeWavPcm16", () => {
+  it("writes the canonical RIFF/WAVE/fmt /data tags", async () => {
+    const view = await readView(encodeWavPcm16(new Float32Array(4)));
+    expect(readStr(view, 0, 4)).toBe("RIFF");
+    expect(readStr(view, 8, 4)).toBe("WAVE");
+    expect(readStr(view, 12, 4)).toBe("fmt ");
+    expect(readStr(view, 36, 4)).toBe("data");
+  });
+
+  it("writes a PCM fmt chunk (size=16, format=1, mono, 16-bit)", async () => {
+    const samples = new Float32Array(10);
+    const view = await readView(encodeWavPcm16(samples));
+    expect(view.getUint32(16, true)).toBe(16); // fmt chunk size
+    expect(view.getUint16(20, true)).toBe(1); // audioFormat = PCM
+    expect(view.getUint16(22, true)).toBe(1); // channels = mono
+    expect(view.getUint16(34, true)).toBe(16); // bits per sample
+  });
+
+  it("derives byteRate, blockAlign and dataSize from the sample rate and length", async () => {
+    const sampleRate = 16000;
+    const samples = new Float32Array(10);
+    const view = await readView(encodeWavPcm16(samples, sampleRate));
+    expect(view.getUint32(28, true)).toBe(sampleRate * 2); // byteRate = sampleRate * 2
+    expect(view.getUint16(32, true)).toBe(2); // blockAlign = 2 (mono * 16-bit)
+    expect(view.getUint32(40, true)).toBe(samples.length * 2); // dataSize
+    expect(view.getUint32(4, true)).toBe(36 + samples.length * 2); // RIFF chunk size
+  });
+
+  it("defaults the sample rate to 16000 at offset 24", async () => {
+    const view = await readView(encodeWavPcm16(new Float32Array(2)));
+    expect(view.getUint32(24, true)).toBe(16000);
+  });
+
+  it("writes the overridden sample rate at offset 24 (8000 / 48000)", async () => {
+    const view8 = await readView(encodeWavPcm16(new Float32Array(2), 8000));
+    expect(view8.getUint32(24, true)).toBe(8000);
+    expect(view8.getUint32(28, true)).toBe(8000 * 2); // byteRate follows the override
+
+    const view48 = await readView(encodeWavPcm16(new Float32Array(2), 48000));
+    expect(view48.getUint32(24, true)).toBe(48000);
+    expect(view48.getUint32(28, true)).toBe(48000 * 2);
+  });
+
+  it("clamps and quantises PCM16 samples to the asymmetric rails", async () => {
+    // +1.0 -> 32767 (clamped>=0 uses *0x7fff), -1.0 -> -32768 (clamped<0 uses *0x8000),
+    // 0 -> 0, and out-of-range values are clamped to the rails first.
+    const samples = new Float32Array([1.0, -1.0, 0, 1.5, -1.5]);
+    const view = await readView(encodeWavPcm16(samples));
+    expect(view.getInt16(44 + 0 * 2, true)).toBe(32767); // +1.0
+    expect(view.getInt16(44 + 1 * 2, true)).toBe(-32768); // -1.0
+    expect(view.getInt16(44 + 2 * 2, true)).toBe(0); // 0
+    expect(view.getInt16(44 + 3 * 2, true)).toBe(32767); // +1.5 -> clamped to +1.0
+    expect(view.getInt16(44 + 4 * 2, true)).toBe(-32768); // -1.5 -> clamped to -1.0
+  });
+
+  it("produces a mono blob of length 44 + samples.length * 2", () => {
+    expect(encodeWavPcm16(new Float32Array(0)).size).toBe(44);
+    expect(encodeWavPcm16(new Float32Array(100)).size).toBe(44 + 100 * 2);
+    expect(encodeWavPcm16(new Float32Array(100)).type).toBe("audio/wav");
+  });
+});

apps/client/src/features/editor/components/audio/audio-menu.tsx

@@ -1,23 +1,43 @@
 import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
-import { useCallback } from "react";
+import { useCallback, useState } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
 import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
 } from "@/features/editor/components/table/types/types.ts";
-import { ActionIcon, Tooltip } from "@mantine/core";
+import { ActionIcon, Loader, Tooltip } from "@mantine/core";
 import {
   IconDownload,
+  IconFileText,
   IconTrash,
 } from "@tabler/icons-react";
+import { notifications } from "@mantine/notifications";
+import { useAtomValue } from "jotai";
 import { useTranslation } from "react-i18next";
 import { getFileUrl } from "@/lib/config.ts";
+import { workspaceAtom } from "@/features/user/atoms/current-user-atom.ts";
+import { transcribeAudio } from "@/features/dictation/services/dictation-service";
 import classes from "../common/toolbar-menu.module.css";
 
+// STT-accepted audio MIME types (mirror of the server whitelist). If the
+// fetched blob's type is not one of these, we infer it from the file
+// extension so the upload's content-type is something the endpoint accepts.
+const RECOGNIZED_AUDIO_MIME = new Set([
+  "audio/webm", "audio/ogg", "audio/mp4", "audio/mpeg",
+  "audio/wav", "audio/x-wav", "audio/wave", "audio/m4a", "audio/x-m4a",
+]);
+const AUDIO_MIME_BY_EXT: Record<string, string> = {
+  mp3: "audio/mpeg", m4a: "audio/mp4", mp4: "audio/mp4",
+  wav: "audio/wav", ogg: "audio/ogg", oga: "audio/ogg", webm: "audio/webm",
+};
+
 export function AudioMenu({ editor }: EditorMenuProps) {
   const { t } = useTranslation();
+  const workspace = useAtomValue(workspaceAtom);
+  const dictationEnabled = workspace?.settings?.ai?.dictation === true;
+  const [isTranscribing, setIsTranscribing] = useState(false);
 
   const editorState = useEditorState({
     editor,
@@ -68,6 +88,100 @@ export function AudioMenu({ editor }: EditorMenuProps) {
     };
   }, [editor]);
 
+  const handleTranscribe = useCallback(async () => {
+    const src = editorState?.src;
+    if (!src || isTranscribing) return;
+
+    // The bubble menu shows for the selected audio node, so selection.from is
+    // that node's start position. Capture it now to disambiguate duplicate-src
+    // blocks after the async transcription completes.
+    const selectedPos = editor.state.selection.from;
+
+    setIsTranscribing(true);
+    try {
+      const fileUrl = getFileUrl(src);
+      // Derive a filename from the internal src for the multipart part name and
+      // for MIME inference when the fetched blob has no usable type.
+      const filename = decodeURIComponent(
+        src.split("?")[0].split("/").pop() || "audio",
+      );
+
+      const res = await fetch(fileUrl, { credentials: "include" });
+      if (!res.ok) {
+        throw new Error(`Failed to fetch audio file (HTTP ${res.status})`);
+      }
+      const blob = await res.blob();
+
+      // Ensure the upload's content-type is one the STT endpoint accepts; the
+      // server keys off the blob's MIME type.
+      let uploadBlob = blob;
+      const baseType = (blob.type || "").split(";")[0].trim().toLowerCase();
+      if (!RECOGNIZED_AUDIO_MIME.has(baseType)) {
+        const ext = filename.split(".").pop()?.toLowerCase() ?? "";
+        const inferred = AUDIO_MIME_BY_EXT[ext];
+        if (inferred) {
+          // Rebuild the blob with an accepted content-type; the server keys off it.
+          uploadBlob = new Blob([blob], { type: inferred });
+        }
+      }
+
+      const text = (await transcribeAudio(uploadBlob, filename)).trim();
+      if (text.length === 0) {
+        notifications.show({ message: t("No speech detected") });
+        return;
+      }
+
+      // Re-scan the doc at insert time so a collaborative edit during the async
+      // transcription can't misplace the text. Among audio nodes with this src
+      // (the same file may be embedded more than once), pick the occurrence
+      // closest to the originally-selected block.
+      let insertPos: number | null = null;
+      let bestDelta = Infinity;
+      editor.state.doc.descendants((node, pos) => {
+        if (node.type.name === "audio" && node.attrs.src === src) {
+          const delta = Math.abs(pos - selectedPos);
+          if (delta < bestDelta) {
+            bestDelta = delta;
+            insertPos = pos + node.nodeSize; // position just after the audio block
+          }
+        }
+        return true; // visit all nodes to find the closest match
+      });
+
+      const paragraph = { type: "paragraph", content: [{ type: "text", text }] };
+      try {
+        if (insertPos !== null) {
+          editor.chain().focus().insertContentAt(insertPos, paragraph).run();
+        } else {
+          editor.chain().focus().insertContent(paragraph).run();
+        }
+      } catch (insertErr) {
+        // A destroyed editor or out-of-bounds position must not throw; log and
+        // ignore so the transcription itself is not reported as a failure.
+        console.error("[audio-transcribe] insert failed", insertErr);
+      }
+    } catch (err) {
+      console.error("[audio-transcribe] failed", err);
+      const resp = (
+        err as { response?: { status?: number; data?: { message?: string } } }
+      )?.response;
+      const serverMsg = resp?.data?.message;
+      let message: string;
+      if (serverMsg && serverMsg.trim().length > 0) {
+        // The server already explains the cause (e.g. provider error, bad
+        // format, STT not configured) — show it verbatim.
+        message = serverMsg;
+      } else if (resp?.status === 503 || resp?.status === 403) {
+        message = t("Voice dictation is not configured");
+      } else {
+        message = `${t("Transcription failed")}: ${(err as { message?: string })?.message ?? String(err)}`;
+      }
+      notifications.show({ color: "red", message });
+    } finally {
+      setIsTranscribing(false);
+    }
+  }, [editor, editorState?.src, isTranscribing, t]);
+
   const handleDownload = useCallback(() => {
     if (!editorState?.src) return;
     const url = getFileUrl(editorState.src);
@@ -95,6 +209,20 @@ export function AudioMenu({ editor }: EditorMenuProps) {
       shouldShow={shouldShow}
     >
       <div className={classes.toolbar}>
+        {dictationEnabled && (
+          <Tooltip position="top" label={isTranscribing ? t("Transcribing…") : t("Transcribe")} withinPortal={false}>
+            <ActionIcon
+              onClick={handleTranscribe}
+              size="lg"
+              aria-label={t("Transcribe")}
+              variant="subtle"
+              disabled={isTranscribing}
+            >
+              {isTranscribing ? <Loader size={18} /> : <IconFileText size={18} />}
+            </ActionIcon>
+          </Tooltip>
+        )}
+
         <Tooltip position="top" label={t("Download")} withinPortal={false}>
           <ActionIcon
             onClick={handleDownload}

apps/client/src/features/editor/components/code-block/code-block-view.tsx

@@ -47,6 +47,26 @@ export default function CodeBlockView(props: NodeViewProps) {
 
   return (
     <NodeViewWrapper className="codeBlock">
+      {/* #146: the editable <pre><code> (contentDOM) MUST come first in the DOM.
+          With the non-editable menu rendered before it, the browser's click
+          hit-testing snapped the caret up one line. Render content first; the
+          menu is rendered after it and lifted back above visually via flex
+          `order: -1` (the `.codeBlock` wrapper is a flex column — see
+          code-block.module.css). It stays fully in flow as a full-width row
+          above the code: no overlay/absolute positioning. The second #146
+          mitigation lives in editor-paste-handler.tsx (reflowAfterPaste). */}
+      <pre
+        spellCheck="false"
+        hidden={
+          ((language === "mermaid" && !editor.isEditable) ||
+            (language === "mermaid" && !isSelected)) &&
+          node.textContent.length > 0
+        }
+      >
+        {/* @ts-ignore */}
+        <NodeViewContent as="code" className={`language-${language}`} />
+      </pre>
+
       <Group
         justify="flex-end"
         contentEditable={false}
@@ -83,18 +103,6 @@ export default function CodeBlockView(props: NodeViewProps) {
         </CopyButton>
       </Group>
 
-      <pre
-        spellCheck="false"
-        hidden={
-          ((language === "mermaid" && !editor.isEditable) ||
-            (language === "mermaid" && !isSelected)) &&
-          node.textContent.length > 0
-        }
-      >
-        {/* @ts-ignore */}
-        <NodeViewContent as="code" className={`language-${language}`} />
-      </pre>
-
       {language === "mermaid" && (
         <Suspense fallback={null}>
           <MermaidView props={props} />

apps/client/src/features/editor/components/code-block/code-block.module.css

@@ -17,7 +17,14 @@
     justify-content: center;
 }
 
+/* #146: the menu now follows the <pre> in the DOM (so the editable contentDOM is
+   FIRST and click hit-testing is correct). Lift it back ABOVE the code visually
+   with flex `order` — the .codeBlock wrapper is a flex column (see code.css) —
+   so the menu still reads as a row above the code, exactly as before, without
+   sitting in-flow before the contentDOM. */
 .menuGroup {
+    order: -1;
+
     @media print {
         display: none;
     }

apps/client/src/features/editor/components/common/editor-paste-handler.test.ts

@@ -0,0 +1,160 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
+import {
+  collectScrollAncestors,
+  reflowAfterPaste,
+} from "./editor-paste-handler";
+
+/**
+ * Unit tests for the #146 post-paste reflow helpers. jsdom does not compute
+ * styles or layout, so we stub getComputedStyle (per element via a Map) and the
+ * scroll/overflow geometry properties (per element via Object.defineProperty).
+ * Element trees are built DETACHED from `document`, so the ancestor walk only
+ * traverses the elements we create. collectScrollAncestors always appends
+ * document.scrollingElement, so we assert on specific ancestors with
+ * toContain/not.toContain rather than exact-array equality.
+ */
+
+type Overflow = { overflowX: string; overflowY: string };
+const styleMap = new Map<Element, Overflow>();
+
+function makeScrollable(
+  overflowY: string,
+  {
+    sh = 0,
+    ch = 0,
+    sw = 0,
+    cw = 0,
+    left = 0,
+    top = 0,
+    overflowX = "visible",
+  }: {
+    sh?: number;
+    ch?: number;
+    sw?: number;
+    cw?: number;
+    left?: number;
+    top?: number;
+    overflowX?: string;
+  } = {},
+) {
+  const el = document.createElement("div");
+  Object.defineProperty(el, "scrollHeight", { configurable: true, value: sh });
+  Object.defineProperty(el, "clientHeight", { configurable: true, value: ch });
+  Object.defineProperty(el, "scrollWidth", { configurable: true, value: sw });
+  Object.defineProperty(el, "clientWidth", { configurable: true, value: cw });
+  Object.defineProperty(el, "scrollLeft", { configurable: true, value: left });
+  Object.defineProperty(el, "scrollTop", { configurable: true, value: top });
+  styleMap.set(el, { overflowX, overflowY });
+  return el;
+}
+
+// A leaf node whose parentElement is `parent`. The walk starts from
+// node.parentElement, so the parent is the first candidate ancestor.
+function makeNodeUnder(parent: HTMLElement) {
+  const node = document.createElement("div");
+  parent.appendChild(node);
+  return node;
+}
+
+// Override `document.scrollingElement` as an instance own-property (the native
+// implementation is a getter on Document.prototype, which we never touch).
+function setScrollingElement(value: Element | null) {
+  Object.defineProperty(document, "scrollingElement", {
+    configurable: true,
+    get: () => value,
+  });
+}
+
+beforeEach(() => {
+  styleMap.clear();
+  vi.stubGlobal("getComputedStyle", (el: Element) => {
+    return styleMap.get(el) ?? { overflowX: "visible", overflowY: "visible" };
+  });
+});
+
+afterEach(() => {
+  vi.unstubAllGlobals();
+  // Drop the per-test instance override so the native prototype getter shows
+  // through again (it was never modified, so no further restore is needed).
+  delete (document as any).scrollingElement;
+});
+
+describe("collectScrollAncestors", () => {
+  it("includes an overflow:overlay ancestor that overflows (macOS case)", () => {
+    setScrollingElement(null);
+    const a = makeScrollable("overlay", { sh: 200, ch: 100 });
+    const node = makeNodeUnder(a);
+    expect(collectScrollAncestors(node)).toContain(a);
+  });
+
+  it("excludes an overflow:auto ancestor that does NOT overflow (gate fails)", () => {
+    setScrollingElement(null);
+    const a = makeScrollable("auto", { sh: 100, ch: 100 });
+    const node = makeNodeUnder(a);
+    expect(collectScrollAncestors(node)).not.toContain(a);
+  });
+
+  it("includes an overflow:auto ancestor that overflows", () => {
+    setScrollingElement(null);
+    const a = makeScrollable("auto", { sh: 200, ch: 100 });
+    const node = makeNodeUnder(a);
+    expect(collectScrollAncestors(node)).toContain(a);
+  });
+
+  it("excludes a non-scrollable overflow even when it overflows", () => {
+    setScrollingElement(null);
+    const a = makeScrollable("hidden", { sh: 200, ch: 100 });
+    const node = makeNodeUnder(a);
+    expect(collectScrollAncestors(node)).not.toContain(a);
+  });
+
+  it("includes an X-axis overflow:scroll ancestor that overflows horizontally", () => {
+    setScrollingElement(null);
+    const a = makeScrollable("visible", {
+      overflowX: "scroll",
+      sw: 200,
+      cw: 100,
+    });
+    const node = makeNodeUnder(a);
+    expect(collectScrollAncestors(node)).toContain(a);
+  });
+
+  it("dedups: scrollingElement already in the walk is added exactly once", () => {
+    const a = makeScrollable("auto", { sh: 200, ch: 100 });
+    setScrollingElement(a);
+    const node = makeNodeUnder(a);
+    const result = collectScrollAncestors(node);
+    expect(result.filter((x) => x === a).length).toBe(1);
+  });
+
+  it("does not throw and appends nothing when scrollingElement is null", () => {
+    setScrollingElement(null);
+    const a = makeScrollable("auto", { sh: 200, ch: 100 });
+    const node = makeNodeUnder(a);
+    const result = collectScrollAncestors(node);
+    // Only the qualifying ancestor we built — no trailing scrollingElement.
+    expect(result).toEqual([a]);
+  });
+});
+
+describe("reflowAfterPaste", () => {
+  it("runs the double rAF and nudges each ancestor with scrollTo(scrollLeft, scrollTop)", () => {
+    // Run the double-nested requestAnimationFrame synchronously.
+    vi.stubGlobal(
+      "requestAnimationFrame",
+      (cb: FrameRequestCallback) => {
+        cb(0);
+        return 0;
+      },
+    );
+    setScrollingElement(null);
+
+    const a = makeScrollable("auto", { sh: 200, ch: 100, left: 5, top: 10 });
+    const node = makeNodeUnder(a);
+    (a as any).scrollTo = vi.fn();
+
+    reflowAfterPaste({ view: { dom: node } } as any);
+
+    expect((a as any).scrollTo).toHaveBeenCalledWith(5, 10);
+  });
+});

apps/client/src/features/editor/components/common/editor-paste-handler.tsx

@@ -22,12 +22,81 @@ const ATTACHMENT_NODE_TYPES = [
 
 const ATTACHMENT_URL_RE = /\/api\/files\/([0-9a-f-]+)\//;
 
+const SCROLLABLE_OVERFLOW = new Set(["auto", "scroll", "overlay"]);
+
+/**
+ * Collect every scrollable ancestor of the editor DOM whose hit-test layer
+ * could be stale after a paste, plus the document scrolling element. We nudge
+ * ALL of them (a zero-delta nudge is harmless) because the real scroll container
+ * varies — a styled overflow ancestor on most pages, the document itself on
+ * others — and `overflow: overlay` (common on macOS, where #146 reproduces)
+ * must count as scrollable too. Called only AFTER the paste has committed, so
+ * `scrollHeight > clientHeight` reflects the inserted content.
+ */
+export function collectScrollAncestors(node: HTMLElement): HTMLElement[] {
+  const targets: HTMLElement[] = [];
+  // Walk every ancestor (incl. body/html) — on some layouts the scroll lives on
+  // body rather than the documentElement that scrollingElement points at.
+  let el: HTMLElement | null = node.parentElement;
+  while (el) {
+    const { overflowX, overflowY } = getComputedStyle(el);
+    const scrollsY =
+      SCROLLABLE_OVERFLOW.has(overflowY) && el.scrollHeight > el.clientHeight;
+    const scrollsX =
+      SCROLLABLE_OVERFLOW.has(overflowX) && el.scrollWidth > el.clientWidth;
+    if (scrollsY || scrollsX) targets.push(el);
+    el = el.parentElement;
+  }
+  const docEl = document.scrollingElement as HTMLElement | null;
+  if (docEl && !targets.includes(docEl)) targets.push(docEl);
+  return targets;
+}
+
+/**
+ * Re-flow the editor's scroll containers after a paste so the browser refreshes
+ * its click hit-testing geometry (#146). Pasting markdown/code inserts React
+ * NodeViews that mount ASYNCHRONOUSLY; until the next reflow, ProseMirror's
+ * posAtCoords/caretRangeFromPoint can map a click to a stale (offset) line —
+ * which users observed clears itself on any scroll. We reproduce that scroll's
+ * side effect with a ZERO-delta nudge (re-assign scrollTop/Left to their current
+ * value), invalidating the hit-test layer WITHOUT moving the viewport. The
+ * container lookup AND the nudge run across two animation frames so they happen
+ * AFTER the pasted content + NodeViews commit (only then is the real scroll
+ * container measurable).
+ *
+ * This is the SECOND of two #146 mitigations; the FIRST is the content-first DOM
+ * order in the NodeViews (code-block-view.tsx, footnotes-list-view.tsx,
+ * footnote-definition-view.tsx). Editing one, check the other.
+ */
+export function reflowAfterPaste(editor: Editor) {
+  const dom = editor.view.dom as HTMLElement;
+  requestAnimationFrame(() => {
+    requestAnimationFrame(() => {
+      for (const el of collectScrollAncestors(dom)) {
+        // Zero-delta nudge: re-set the scroll position to its current value to
+        // invalidate the browser's hit-test layer WITHOUT moving the viewport.
+        // `scrollTo(x, y)` is the repo idiom and avoids a lint-flagged
+        // self-assignment.
+        el.scrollTo(el.scrollLeft, el.scrollTop);
+      }
+    });
+  });
+}
+
 export const handlePaste = (
   editor: Editor,
   event: ClipboardEvent,
   pageId: string,
   creatorId?: string,
 ) => {
+  // Schedule a post-paste reflow on EVERY paste path — intentionally. handlePaste
+  // returns BEFORE the markdown/code-insertion plugin runs, so it cannot know here
+  // whether async NodeViews will be inserted; the nudge is a cheap layout read on
+  // the next frames and a no-op for the viewport, so scheduling it unconditionally
+  // is simpler and harmless. Pairs with the content-first DOM order in the
+  // NodeViews — both address #146 from different angles.
+  reflowAfterPaste(editor);
+
   const clipboardData = event.clipboardData.getData("text/plain");
 
   if (INTERNAL_LINK_REGEX.test(clipboardData)) {

apps/client/src/features/editor/components/common/node-resize.module.css

@@ -73,3 +73,18 @@
     display: none !important;
   }
 }
+
+/* Float image (#145): on narrow screens a floated image would crowd the text to
+   an unreadable column, so collapse it to full width and drop the float.
+   `!important` is required because applyAlignment sets `float`/`padding` inline,
+   which a normal rule cannot override. Keys off the `data-image-align` attribute
+   the image node view mirrors onto its container. This module is the one actually
+   imported by the resize node views (node-resize-handles.ts), so the rule loads. */
+@media (max-width: 600px) {
+  .container:global([data-image-align="floatLeft"]),
+  .container:global([data-image-align="floatRight"]) {
+    float: none !important;
+    width: 100% !important;
+    padding: 0 !important;
+  }
+}

apps/client/src/features/editor/components/fixed-toolbar/groups/dictation-group.tsx

@@ -1,5 +1,7 @@
 import { FC, useRef } from "react";
 import type { Editor } from "@tiptap/react";
+import { useAtomValue } from "jotai";
+import { workspaceAtom } from "@/features/user/atoms/current-user-atom.ts";
 import { MicButton } from "@/features/dictation/components/mic-button";
 
 interface Props {
@@ -9,6 +11,11 @@ interface Props {
 }
 
 export const DictationGroup: FC<Props> = ({ editor, color, iconSize }) => {
+  // Streaming (silence-cut) dictation is opt-in per workspace; absent/false
+  // keeps the stable batch path.
+  const workspace = useAtomValue(workspaceAtom);
+  const streamingDictation =
+    workspace?.settings?.ai?.dictationStreaming === true;
   // Caret snapshot taken when dictation starts (where the first segment lands).
   const rangeRef = useRef<{ from: number; to: number } | null>(null);
   // Running insertion point: after each inserted segment we remember the caret
@@ -70,7 +77,7 @@ export const DictationGroup: FC<Props> = ({ editor, color, iconSize }) => {
   return (
     <MicButton
       size="md"
-      streaming
+      streaming={streamingDictation}
       onStart={handleStart}
       onText={handleText}
       disabled={!editor.isEditable}

apps/client/src/features/editor/components/footnote/footnote-definition-view.tsx

@@ -1,25 +1,45 @@
 import { NodeViewContent, NodeViewProps, NodeViewWrapper } from "@tiptap/react";
 import { useTranslation } from "react-i18next";
-import { getFootnoteNumber } from "@docmost/editor-ext";
+import { getFootnoteNumber, getFootnoteRefCount } from "@docmost/editor-ext";
 import classes from "./footnote.module.css";
 
+/**
+ * A 0-based backlink index -> its lowercase letter label (0 -> "a", 25 -> "z",
+ * 26 -> "aa", ...), matching the Pandoc/Wikipedia "↩ a b c" convention.
+ */
+export function backlinkLabel(index: number): string {
+  let out = "";
+  let x = index;
+  while (x >= 0) {
+    out = String.fromCharCode(97 + (x % 26)) + out;
+    x = Math.floor(x / 26) - 1;
+  }
+  return out;
+}
+
 /**
  * NodeView for a single footnote definition: a decorative number marker, the
  * editable content (NodeViewContent), and a "↩" back-link to its reference.
  * The number is derived from the document (not stored).
+ *
+ * After #166 a footnote can be referenced more than once (one number, one
+ * definition, N forward links). When it is, the back-link becomes a row of
+ * per-occurrence links — ↩ a b c … — each scrolling to its own reference (#168);
+ * a single-reference footnote keeps the plain ↩.
  */
 export default function FootnoteDefinitionView(props: NodeViewProps) {
   const { node, editor } = props;
   const { t } = useTranslation();
   const id = node.attrs.id as string;
 
-  // Read the cached number from the numbering plugin (computed once per doc
-  // change) rather than recomputing the whole map on every render.
+  // Read the cached number/ref-count from the numbering plugin (computed once
+  // per doc change) rather than recomputing the whole map on every render.
   const number = getFootnoteNumber(editor.state, id) ?? "?";
+  const refCount = getFootnoteRefCount(editor.state, id);
 
-  const handleBack = (e: React.MouseEvent) => {
+  const jumpTo = (e: React.MouseEvent, index: number) => {
     e.preventDefault();
-    editor.commands.scrollToReference(id);
+    editor.commands.scrollToReference(id, index);
   };
 
   return (
@@ -29,20 +49,60 @@ export default function FootnoteDefinitionView(props: NodeViewProps) {
       className={classes.definition}
       style={{ ["--footnote-number" as any]: `"${number}"` }}
     >
-      <span className={classes.definitionMarker} contentEditable={false}>
-        {number}.
-      </span>
+      {/* #146: contentDOM MUST be the first child — a non-editable marker before
+          it makes click hit-testing snap the caret above. Content first; the
+          marker + back-link follow in DOM and are placed left/right via CSS
+          flex `order`. The second #146 mitigation lives in
+          editor-paste-handler.tsx (reflowAfterPaste). */}
       <NodeViewContent className={classes.definitionContent} />
       <span
-        className={classes.backLink}
+        className={classes.definitionMarker}
         contentEditable={false}
-        onClick={handleBack}
-        role="button"
-        aria-label={t("Back to reference")}
-        title={t("Back to reference")}
+        aria-hidden="true"
       >
-        ↩
+        {number}.
       </span>
+      {refCount > 1 ? (
+        // Multiple references -> ↩ followed by one lettered link per occurrence.
+        <span
+          className={classes.backLinks}
+          contentEditable={false}
+          role="group"
+          aria-label={t("Back to references")}
+        >
+          <span className={classes.backLinkArrow} aria-hidden="true">
+            ↩
+          </span>
+          {Array.from({ length: refCount }, (_, i) => (
+            <span
+              key={i}
+              className={classes.backLink}
+              onClick={(e) => jumpTo(e, i)}
+              role="button"
+              aria-label={t("Back to reference {{label}}", {
+                label: backlinkLabel(i),
+              })}
+              title={t("Back to reference {{label}}", {
+                label: backlinkLabel(i),
+              })}
+            >
+              {backlinkLabel(i)}
+            </span>
+          ))}
+        </span>
+      ) : (
+        // Single reference -> the plain ↩ (unchanged behavior).
+        <span
+          className={classes.backLink}
+          contentEditable={false}
+          onClick={(e) => jumpTo(e, 0)}
+          role="button"
+          aria-label={t("Back to reference")}
+          title={t("Back to reference")}
+        >
+          ↩
+        </span>
+      )}
     </NodeViewWrapper>
   );
 }

apps/client/src/features/editor/components/footnote/footnote-views.structure.test.tsx

@@ -0,0 +1,231 @@
+import { describe, it, expect, vi, afterEach } from "vitest";
+import { render, fireEvent } from "@testing-library/react";
+
+/**
+ * Structural regression guard for #146 (PR #147).
+ *
+ * Guards ALL THREE editable NodeViews touched by the fix: the two footnote views
+ * (FootnotesListView, FootnoteDefinitionView) AND the code block (CodeBlockView).
+ *
+ * The caret/click-offset fix rests entirely on ONE invariant: in every editable
+ * NodeView the editable `NodeViewContent` (contentDOM) must come FIRST in the
+ * wrapper, with no non-editable (`contenteditable="false"`) element before it.
+ * If a future edit reinserts chrome (separator, heading, marker, back-link,
+ * language menu) ahead of the content, the macOS hit-testing bug returns
+ * silently — and the symptom needs a real browser to see. This test pins the
+ * DOM ORDER (the proxy that IS the fix) in the existing jsdom harness.
+ *
+ * We stub `@tiptap/react` so the views render as plain DOM and we can inspect
+ * the child order our JSX produces — that order is exactly what regresses, and
+ * it does not depend on a live editor. The stubbed `NodeViewContent` carries the
+ * real `data-node-view-content` marker tiptap uses, so the assertion mirrors
+ * production. This test passes on the fixed order and FAILS on the pre-fix order
+ * (chrome-before-content).
+ */
+vi.mock("@tiptap/react", () => ({
+  NodeViewWrapper: ({ children, ...props }: any) => (
+    <div data-testid="nvw" {...props}>
+      {children}
+    </div>
+  ),
+  // Mirror the real contentDOM marker so the guard matches production output.
+  NodeViewContent: (props: any) => <div data-node-view-content="" {...props} />,
+}));
+
+vi.mock("react-i18next", () => ({
+  useTranslation: () => ({ t: (key: string) => key }),
+}));
+
+// footnote-definition-view reads a cached number + reference count from the
+// numbering plugin; stub them so we don't need a live ProseMirror state. The
+// ref-count is a hoisted mutable so a test can drive the single-vs-multi
+// backlink branch (#168). Default 1 = single reference (the #146 cases).
+const { mockRefCount } = vi.hoisted(() => ({ mockRefCount: { value: 1 } }));
+vi.mock("@docmost/editor-ext", () => ({
+  getFootnoteNumber: () => 1,
+  getFootnoteRefCount: () => mockRefCount.value,
+}));
+
+// Mocks so CodeBlockView renders cheaply (no MantineProvider, no matchMedia).
+// The Group mock MUST forward contentEditable: React serializes
+// contentEditable={false} to the DOM attribute contenteditable="false", which
+// the structural guard selects on to identify non-editable chrome.
+vi.mock("@mantine/core", () => ({
+  Group: ({ children, className, contentEditable }: any) => (
+    <div className={className} contentEditable={contentEditable}>
+      {children}
+    </div>
+  ),
+  Select: () => null,
+  Tooltip: ({ children }: any) => <>{children}</>,
+  ActionIcon: ({ children, onClick }: any) => (
+    <button onClick={onClick}>{children}</button>
+  ),
+}));
+vi.mock("@/components/common/copy-button", () => ({
+  CopyButton: ({ children }: any) =>
+    children({ copied: false, copy: () => {} }),
+}));
+vi.mock("@tabler/icons-react", () => ({
+  IconCheck: () => null,
+  IconCopy: () => null,
+}));
+vi.mock("@/features/editor/components/code-block/mermaid-view.tsx", () => ({
+  default: () => null,
+}));
+
+import FootnotesListView from "./footnotes-list-view";
+import FootnoteDefinitionView, {
+  backlinkLabel,
+} from "./footnote-definition-view";
+import CodeBlockView from "../code-block/code-block-view";
+
+// Minimal NodeViewProps stub: definition view only touches node.attrs.id and
+// editor.state (the latter unused once getFootnoteNumber is mocked).
+const props = {
+  node: { attrs: { id: "fn-1" }, textContent: "" },
+  editor: { state: {}, isEditable: true, commands: {} },
+  getPos: () => 0,
+  updateAttributes: () => {},
+  deleteNode: () => {},
+} as any;
+
+// CodeBlockView needs more than the footnote stub: a language attr (non-mermaid
+// so MermaidView never renders), an editor with selection/on/off, and an
+// extension exposing lowlight.listLanguages.
+const codeBlockProps = {
+  node: { attrs: { language: "javascript" }, textContent: "", nodeSize: 1 },
+  editor: {
+    state: { selection: { from: 0, to: 0 } },
+    isEditable: true,
+    commands: {},
+    on: vi.fn(),
+    off: vi.fn(),
+  },
+  extension: {
+    options: { lowlight: { listLanguages: () => ["javascript", "python"] } },
+  },
+  getPos: () => 0,
+  updateAttributes: () => {},
+  deleteNode: () => {},
+} as any;
+
+const cases: Array<{ name: string; ui: React.ReactElement }> = [
+  { name: "FootnotesListView", ui: <FootnotesListView {...props} /> },
+  { name: "FootnoteDefinitionView", ui: <FootnoteDefinitionView {...props} /> },
+  { name: "CodeBlockView", ui: <CodeBlockView {...codeBlockProps} /> },
+];
+
+describe("#146 editable NodeView contentDOM-first invariant", () => {
+  it.each(cases)(
+    "$name renders the editable contentDOM ahead of all non-editable chrome",
+    ({ ui }) => {
+      const { getByTestId } = render(ui);
+      const wrapper = getByTestId("nvw");
+
+      const content = wrapper.querySelector("[data-node-view-content]");
+      expect(content).not.toBeNull();
+
+      // The contentDOM sits at the FRONT of the wrapper: it is either the
+      // wrapper's first child (footnote views) or nested in the first child
+      // (code-block wraps it in <pre>). Either way the first element child
+      // must contain it. (compareDocumentPosition below is NOT redundant here:
+      // for code-block the content is not the literal first child, so we keep
+      // the document-order check to prove no chrome precedes the content.)
+      const firstEl = wrapper.firstElementChild!;
+      expect(firstEl === content || firstEl.contains(content!)).toBe(true);
+
+      // Chrome exists (separator/heading/marker/back-link/menu)...
+      const nonEditable = wrapper.querySelectorAll('[contenteditable="false"]');
+      expect(nonEditable.length).toBeGreaterThan(0);
+
+      // ...and every non-editable element comes AFTER the contentDOM, so the
+      // browser's click hit-testing reaches the editable content first (#146).
+      for (const el of Array.from(nonEditable)) {
+        const pos = content!.compareDocumentPosition(el);
+        expect(pos & Node.DOCUMENT_POSITION_FOLLOWING).toBeTruthy();
+      }
+    },
+  );
+});
+
+// #168: a footnote referenced more than once shows one lettered backlink per
+// occurrence (↩ a b c), each scrolling to its own reference; a single-reference
+// footnote keeps the plain ↩.
+describe("#168 footnote definition multi-backlinks", () => {
+  afterEach(() => {
+    // Reset the shared ref-count mock so other tests see a single reference.
+    mockRefCount.value = 1;
+  });
+
+  const makeProps = () =>
+    ({
+      node: { attrs: { id: "fn-1" }, textContent: "" },
+      editor: {
+        state: {},
+        isEditable: true,
+        commands: { scrollToReference: vi.fn() },
+      },
+      getPos: () => 0,
+      updateAttributes: () => {},
+      deleteNode: () => {},
+    }) as any;
+
+  it("renders one lettered backlink per reference (a, b, c) plus the ↩ arrow", () => {
+    mockRefCount.value = 3;
+    const { getByTestId } = render(<FootnoteDefinitionView {...makeProps()} />);
+    const wrapper = getByTestId("nvw");
+
+    const links = wrapper.querySelectorAll('[role="button"]');
+    expect(Array.from(links).map((l) => l.textContent)).toEqual([
+      "a",
+      "b",
+      "c",
+    ]);
+    // The ↩ arrow is present (as decorative chrome, not a button).
+    expect(wrapper.textContent).toContain("↩");
+  });
+
+  it("clicking the n-th backlink scrolls to the n-th occurrence (0-based)", () => {
+    mockRefCount.value = 3;
+    const props = makeProps();
+    const { getByTestId } = render(<FootnoteDefinitionView {...props} />);
+    const links = getByTestId("nvw").querySelectorAll('[role="button"]');
+
+    fireEvent.click(links[1]); // "b"
+    expect(props.editor.commands.scrollToReference).toHaveBeenCalledWith(
+      "fn-1",
+      1,
+    );
+  });
+
+  it("a single-reference footnote renders just one ↩ (no letters)", () => {
+    mockRefCount.value = 1;
+    const props = makeProps();
+    const { getByTestId } = render(<FootnoteDefinitionView {...props} />);
+    const wrapper = getByTestId("nvw");
+
+    const links = wrapper.querySelectorAll('[role="button"]');
+    expect(links.length).toBe(1);
+    expect(links[0].textContent).toBe("↩");
+
+    fireEvent.click(links[0]);
+    expect(props.editor.commands.scrollToReference).toHaveBeenCalledWith(
+      "fn-1",
+      0,
+    );
+  });
+});
+
+// #185 re-review pt 7: backlinkLabel is base-26 (a..z, then aa…). The component
+// tests only cover a,b,c (index 0-2); pin the >= 26 carry boundary.
+describe("backlinkLabel base-26 boundary (#168)", () => {
+  it("maps 0->a, 25->z, 26->aa, 27->ab, 51->az, 52->ba", () => {
+    expect(backlinkLabel(0)).toBe("a");
+    expect(backlinkLabel(25)).toBe("z");
+    expect(backlinkLabel(26)).toBe("aa");
+    expect(backlinkLabel(27)).toBe("ab");
+    expect(backlinkLabel(51)).toBe("az");
+    expect(backlinkLabel(52)).toBe("ba");
+  });
+});

apps/client/src/features/editor/components/footnote/footnote.module.css

@@ -57,14 +57,19 @@
   word-break: break-word;
 }
 
-/* Bottom footnotes container. */
+/* Bottom footnotes container. Flex column so the heading (rendered AFTER the
+   editable NodeViewContent in the DOM for #146) is lifted back above the list
+   visually via `order`, instead of sitting in-flow before the contentDOM. */
 .list {
+  display: flex;
+  flex-direction: column;
   margin-top: var(--mantine-spacing-lg);
   padding-top: var(--mantine-spacing-md);
   border-top: 1px solid var(--mantine-color-default-border);
 }
 
 .listHeading {
+  order: -1; /* visually above the list, though it follows it in the DOM (#146) */
   font-weight: 600;
   font-size: var(--mantine-font-size-sm);
   color: var(--mantine-color-dimmed);
@@ -83,6 +88,7 @@
 }
 
 .definitionMarker {
+  order: -1; /* keep the "N." marker on the LEFT though it follows content in DOM (#146) */
   flex: 0 0 auto;
   min-width: 1.5em;
   /* Right-align within the narrow column so the period sits next to the text
@@ -109,3 +115,18 @@
 .backLink:hover {
   text-decoration: underline;
 }
+
+/* Multi-backlink row (#168): ↩ a b c — one lettered link per reference
+   occurrence. Sits on the right, after the content, like the single ↩. */
+.backLinks {
+  flex: 0 0 auto;
+  display: inline-flex;
+  align-items: baseline;
+  gap: 0.3em;
+  user-select: none;
+}
+
+.backLinkArrow {
+  color: var(--mantine-color-dimmed);
+  font-size: 0.9em;
+}

apps/client/src/features/editor/components/footnote/footnotes-list-view.tsx

@@ -3,18 +3,39 @@ import { useTranslation } from "react-i18next";
 import classes from "./footnote.module.css";
 
 /**
- * NodeView for the bottom footnotes container. Renders a visual separator and a
- * localized heading, then the editable list of definitions via NodeViewContent.
+ * NodeView for the bottom footnotes container: the editable list of definitions
+ * (NodeViewContent) plus a visual separator + localized heading.
+ *
+ * #146: the editable NodeViewContent MUST be the FIRST child in the DOM. A
+ * non-editable block rendered before it (the old separator + heading) makes the
+ * browser's click hit-testing (posAtCoords → caretRangeFromPoint) miss the
+ * contentDOM and snap the caret to the previous node (several lines above, into
+ * the body). So content goes first; the heading is rendered AFTER it and lifted
+ * back above visually with CSS flex `order` (the separator border lives on the
+ * flex container itself).
+ *
+ * The second #146 mitigation lives in editor-paste-handler.tsx (reflowAfterPaste).
  */
 export default function FootnotesListView(_props: NodeViewProps) {
   const { t } = useTranslation();
 
   return (
-    <NodeViewWrapper>
-      <div className={classes.list} contentEditable={false}>
-        <div className={classes.listHeading}>{t("Footnotes")}</div>
-      </div>
+    // role/aria-label preserve the section label for AT: the visible heading
+    // below is now aria-hidden, so without these the "Footnotes" label would be
+    // lost to a screen reader (WCAG 1.3.2 — DOM order has heading after content).
+    <NodeViewWrapper
+      className={classes.list}
+      role="group"
+      aria-label={t("Footnotes")}
+    >
       <NodeViewContent />
+      <div
+        className={classes.listHeading}
+        contentEditable={false}
+        aria-hidden="true"
+      >
+        {t("Footnotes")}
+      </div>
     </NodeViewWrapper>
   );
 }

apps/client/src/features/editor/components/image/image-menu.tsx

@@ -13,6 +13,8 @@ import {
   IconLayoutAlignCenter,
   IconLayoutAlignLeft,
   IconLayoutAlignRight,
+  IconFloatLeft,
+  IconFloatRight,
   IconDownload,
   IconRefresh,
   IconTrash,
@@ -41,6 +43,8 @@ export function ImageMenu({ editor }: EditorMenuProps) {
         isAlignLeft: ctx.editor.isActive("image", { align: "left" }),
         isAlignCenter: ctx.editor.isActive("image", { align: "center" }),
         isAlignRight: ctx.editor.isActive("image", { align: "right" }),
+        isFloatLeft: ctx.editor.isActive("image", { align: "floatLeft" }),
+        isFloatRight: ctx.editor.isActive("image", { align: "floatRight" }),
         src: imageAttrs?.src || null,
         alt: imageAttrs?.alt || "",
       };
@@ -104,6 +108,22 @@ export function ImageMenu({ editor }: EditorMenuProps) {
       .run();
   }, [editor]);
 
+  const alignImageFloatLeft = useCallback(() => {
+    editor
+      .chain()
+      .focus(undefined, { scrollIntoView: false })
+      .setImageAlign("floatLeft")
+      .run();
+  }, [editor]);
+
+  const alignImageFloatRight = useCallback(() => {
+    editor
+      .chain()
+      .focus(undefined, { scrollIntoView: false })
+      .setImageAlign("floatRight")
+      .run();
+  }, [editor]);
+
   const handleDownload = useCallback(() => {
     if (!editorState?.src) return;
     const url = getFileUrl(editorState.src);
@@ -201,6 +221,30 @@ export function ImageMenu({ editor }: EditorMenuProps) {
           </ActionIcon>
         </Tooltip>
 
+        <Tooltip position="top" label={t("Float left (wrap text)")} withinPortal={false}>
+          <ActionIcon
+            onClick={alignImageFloatLeft}
+            size="lg"
+            aria-label={t("Float left (wrap text)")}
+            variant="subtle"
+            className={clsx({ [classes.active]: editorState?.isFloatLeft })}
+          >
+            <IconFloatLeft size={18} />
+          </ActionIcon>
+        </Tooltip>
+
+        <Tooltip position="top" label={t("Float right (wrap text)")} withinPortal={false}>
+          <ActionIcon
+            onClick={alignImageFloatRight}
+            size="lg"
+            aria-label={t("Float right (wrap text)")}
+            variant="subtle"
+            className={clsx({ [classes.active]: editorState?.isFloatRight })}
+          >
+            <IconFloatRight size={18} />
+          </ActionIcon>
+        </Tooltip>
+
         <div className={classes.divider} />
 
         {altTextButton}

apps/client/src/features/editor/components/slash-menu/menu-items.close-on-empty.test.ts

@@ -0,0 +1,61 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { getSuggestionItems } from "./menu-items";
+
+// The slash-command `allow` callback (slash-command.ts) keeps the popup active
+// only while at least one item matches the current query:
+//   const groups = getSuggestionItems({ query });
+//   const hasMatches = Object.values(groups).some((items) => items.length > 0);
+//   return hasMatches;
+// With `allowSpaces: true`, a non-empty query that matches nothing must collapse
+// to an empty result so `allow` returns false and the menu closes (instead of
+// leaving literal "/todo abc" text behind). These tests pin that contract at the
+// `getSuggestionItems` boundary, which is the unit-testable half of `allow`.
+
+const KEY = "currentUser";
+
+function hasMatches(query: string): boolean {
+  // Mirror the exact predicate used by slash-command.ts `allow`.
+  const groups = getSuggestionItems({ query });
+  return Object.values(groups).some((items) => items.length > 0);
+}
+
+beforeEach(() => {
+  // Default workspace state: HTML-embed feature OFF (matches production default).
+  localStorage.setItem(KEY, JSON.stringify({ workspace: { settings: {} } }));
+});
+
+afterEach(() => {
+  localStorage.clear();
+});
+
+describe("getSuggestionItems — empty-query close behavior (slash `allow`)", () => {
+  it("keeps the menu allowed for a query that matches items", () => {
+    expect(hasMatches("h1")).toBe(true);
+  });
+
+  it("keeps the menu allowed for a multi-word matching query", () => {
+    // "Heading 1" is a multi-word title kept alive by allowSpaces.
+    expect(hasMatches("Heading 1")).toBe(true);
+  });
+
+  it("closes the menu (no matches) for a non-empty query that matches nothing", () => {
+    expect(hasMatches("zzzznomatch")).toBe(false);
+  });
+
+  it("closes the menu for a space-bearing non-matching query", () => {
+    // The exact case the allowSpaces fix targets: "/todo abc" matches nothing.
+    expect(hasMatches("todo abc")).toBe(false);
+  });
+
+  it("returns an empty result object for a no-match query", () => {
+    expect(getSuggestionItems({ query: "zzzznomatch" })).toEqual({});
+  });
+
+  it("returns a non-empty result for the 'Heading 1' query", () => {
+    const groups = getSuggestionItems({ query: "Heading 1" });
+    const titles = Object.values(groups)
+      .flat()
+      .map((item) => item.title);
+    expect(titles).toContain("Heading 1");
+  });
+});

apps/client/src/features/editor/components/slash-menu/menu-items.ts

@@ -524,6 +524,29 @@ const CommandGroups: SlashMenuGroupedItemsType = {
         editor.chain().focus().deleteRange(range).insertSubpages().run();
       },
     },
+    {
+      title: "Page tree (child pages, recursive)",
+      description: "Render the full nested tree of all descendant pages",
+      searchTerms: [
+        "subpages",
+        "child",
+        "children",
+        "nested",
+        "hierarchy",
+        "tree",
+        "recursive",
+        "toc",
+      ],
+      icon: IconSitemap,
+      command: ({ editor, range }: CommandProps) => {
+        editor
+          .chain()
+          .focus()
+          .deleteRange(range)
+          .insertSubpages({ recursive: true })
+          .run();
+      },
+    },
     {
       title: "Synced block",
       description: "Create a block that stays in sync across pages.",

apps/client/src/features/editor/components/subpages/subpages-menu.tsx

@@ -1,9 +1,9 @@
 import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
-import { posToDOMRect, findParentNode } from "@tiptap/react";
+import { posToDOMRect, findParentNode, useEditorState } from "@tiptap/react";
 import { Node as PMNode } from "@tiptap/pm/model";
 import React, { useCallback } from "react";
-import { ActionIcon, Tooltip } from "@mantine/core";
-import { IconTrash } from "@tabler/icons-react";
+import { ActionIcon, Group, Tooltip } from "@mantine/core";
+import { IconTrash, IconList, IconSitemap } from "@tabler/icons-react";
 import { useTranslation } from "react-i18next";
 import { Editor } from "@tiptap/core";
 import { isEditorReady } from "@docmost/editor-ext";
@@ -47,6 +47,13 @@ export const SubpagesMenu = React.memo(
       return posToDOMRect(editor.view, selection.from, selection.to);
     }, [editor]);
 
+    const toggleRecursive = useCallback(() => {
+      const current = editor.getAttributes("subpages")?.recursive ?? false;
+      editor.commands.updateAttributes("subpages", {
+        recursive: !current,
+      });
+    }, [editor]);
+
     const deleteNode = useCallback(() => {
       const { selection } = editor.state;
       editor
@@ -57,6 +64,15 @@ export const SubpagesMenu = React.memo(
         .run();
     }, [editor]);
 
+    // Subscribe to the live `recursive` attribute the standard way (as the
+    // sibling bubble menus do): useEditorState re-renders only when the selected
+    // value actually changes, so the mode icon/tooltip stay current after a
+    // toggle without re-rendering on every keystroke.
+    const isRecursive = useEditorState({
+      editor,
+      selector: (ctx) => ctx.editor?.getAttributes("subpages")?.recursive ?? false,
+    });
+
     return (
       <BaseBubbleMenu
         editor={editor}
@@ -64,17 +80,41 @@ export const SubpagesMenu = React.memo(
         updateDelay={0}
         shouldShow={shouldShow}
       >
-        <Tooltip position="top" label={t("Delete")}>
-          <ActionIcon
-            onClick={deleteNode}
-            variant="default"
-            size="lg"
-            color="red"
-            aria-label={t("Delete")}
+        <Group gap={4} wrap="nowrap">
+          <Tooltip
+            position="top"
+            label={
+              isRecursive
+                ? t("Switch to flat list")
+                : t("Switch to tree")
+            }
           >
-            <IconTrash size={18} />
-          </ActionIcon>
-        </Tooltip>
+            <ActionIcon
+              onClick={toggleRecursive}
+              variant="default"
+              size="lg"
+              aria-label={t("Toggle subpages display mode")}
+            >
+              {isRecursive ? (
+                <IconList size={18} />
+              ) : (
+                <IconSitemap size={18} />
+              )}
+            </ActionIcon>
+          </Tooltip>
+
+          <Tooltip position="top" label={t("Delete")}>
+            <ActionIcon
+              onClick={deleteNode}
+              variant="default"
+              size="lg"
+              color="red"
+              aria-label={t("Delete")}
+            >
+              <IconTrash size={18} />
+            </ActionIcon>
+          </Tooltip>
+        </Group>
       </BaseBubbleMenu>
     );
   }

apps/client/src/features/editor/components/subpages/subpages-view.tsx

@@ -1,7 +1,10 @@
 import { NodeViewProps, NodeViewWrapper } from "@tiptap/react";
 import { Stack, Text, Anchor, ActionIcon } from "@mantine/core";
 import { IconFileDescription } from "@tabler/icons-react";
-import { useGetSidebarPagesQuery } from "@/features/page/queries/page-query";
+import {
+  useGetSidebarPagesQuery,
+  useGetPageTreeQuery,
+} from "@/features/page/queries/page-query";
 import { useMemo } from "react";
 import { Link, useParams } from "react-router-dom";
 import classes from "./subpages.module.css";
@@ -12,16 +15,130 @@ import {
 } from "@/features/page/page.utils.ts";
 import { useTranslation } from "react-i18next";
 import { sortPositionKeys } from "@/features/page/tree/utils/utils";
-import { useSharedPageSubpages } from "@/features/share/hooks/use-shared-page-subpages";
+import {
+  useSharedPageSubpages,
+  useSharedPageSubtree,
+} from "@/features/share/hooks/use-shared-page-subpages";
+import {
+  SubpageNode,
+  buildSubtree,
+  mapSharedNodes,
+  countNodes,
+} from "./subpages-view.utils";
+
+// Threshold above which the recursive tree shows a small count note. We never
+// cap the data — this is only an informational hint for very large trees.
+const LARGE_TREE_THRESHOLD = 300;
+
+interface TreeNodeProps {
+  node: SubpageNode;
+  depth: number;
+  shareId?: string;
+  spaceSlug?: string;
+  // Threaded down from the variant component so a large tree does not create one
+  // i18n subscription (useTranslation) per rendered node.
+  t: (key: string) => string;
+}
+
+// Recursive renderer for a single node and its descendants. Indents each level
+// by depth * 16px and reuses the same link/icon markup as the flat list.
+function TreeNode({ node, depth, shareId, spaceSlug, t }: TreeNodeProps) {
+  return (
+    <>
+      <Anchor
+        component={Link}
+        fw={500}
+        to={
+          shareId
+            ? buildSharedPageUrl({
+                shareId,
+                pageSlugId: node.slugId,
+                pageTitle: node.title,
+              })
+            : buildPageUrl(spaceSlug, node.slugId, node.title)
+        }
+        underline="never"
+        className={styles.pageMentionLink}
+        draggable={false}
+        style={{ paddingLeft: depth * 16 }}
+      >
+        {node?.icon ? (
+          <span style={{ marginRight: "4px" }}>{node.icon}</span>
+        ) : (
+          <ActionIcon
+            variant="transparent"
+            color="gray"
+            component="span"
+            size={18}
+            style={{ verticalAlign: "text-bottom" }}
+          >
+            <IconFileDescription size={18} />
+          </ActionIcon>
+        )}
+
+        <span className={styles.pageMentionText}>
+          {node?.title || t("untitled")}
+        </span>
+      </Anchor>
+
+      {node.children.map((child) => (
+        <TreeNode
+          key={child.id}
+          node={child}
+          depth={depth + 1}
+          shareId={shareId}
+          spaceSlug={spaceSlug}
+          t={t}
+        />
+      ))}
+    </>
+  );
+}
 
 export default function SubpagesView(props: NodeViewProps) {
   const { editor } = props;
   const { spaceSlug, shareId } = useParams();
   const { t } = useTranslation();
 
+  const recursive: boolean = props.node.attrs.recursive ?? false;
+
   //@ts-ignore
   const currentPageId = editor.storage.pageId;
 
+  if (recursive) {
+    return (
+      <RecursiveSubpages
+        currentPageId={currentPageId}
+        shareId={shareId}
+        spaceSlug={spaceSlug}
+        t={t}
+      />
+    );
+  }
+
+  return (
+    <FlatSubpages
+      currentPageId={currentPageId}
+      shareId={shareId}
+      spaceSlug={spaceSlug}
+      t={t}
+    />
+  );
+}
+
+interface SubpagesVariantProps {
+  currentPageId: string;
+  shareId?: string;
+  spaceSlug?: string;
+  t: (key: string, options?: Record<string, unknown>) => string;
+}
+
+function FlatSubpages({
+  currentPageId,
+  shareId,
+  spaceSlug,
+  t,
+}: SubpagesVariantProps) {
   // Get subpages from shared tree if we're in a shared context
   const sharedSubpages = useSharedPageSubpages(currentPageId);
 
@@ -119,3 +236,78 @@ export default function SubpagesView(props: NodeViewProps) {
     </NodeViewWrapper>
   );
 }
+
+function RecursiveSubpages({
+  currentPageId,
+  shareId,
+  spaceSlug,
+  t,
+}: SubpagesVariantProps) {
+  // In a shared/public context reuse the already-loaded nested shared tree
+  // instead of issuing a /pages/tree request.
+  const sharedSubtree = useSharedPageSubtree(currentPageId);
+
+  const { data, isLoading, error } = useGetPageTreeQuery(
+    shareId ? "" : currentPageId,
+  );
+
+  const tree = useMemo<SubpageNode[]>(() => {
+    if (shareId) {
+      return mapSharedNodes(sharedSubtree);
+    }
+    if (!data) return [];
+    return buildSubtree(data, currentPageId);
+  }, [data, shareId, sharedSubtree, currentPageId]);
+
+  const total = useMemo(() => countNodes(tree), [tree]);
+
+  if (isLoading && !shareId) {
+    return null;
+  }
+
+  if (error && !shareId) {
+    return (
+      <NodeViewWrapper data-drag-handle>
+        <Text c="dimmed" size="md" py="md">
+          {t("Failed to load subpages")}
+        </Text>
+      </NodeViewWrapper>
+    );
+  }
+
+  if (tree.length === 0) {
+    return (
+      <NodeViewWrapper data-drag-handle>
+        <div className={classes.container}>
+          <Text c="dimmed" size="md" py="md">
+            {t("No subpages")}
+          </Text>
+        </div>
+      </NodeViewWrapper>
+    );
+  }
+
+  return (
+    <NodeViewWrapper data-drag-handle>
+      <div className={classes.container}>
+        <Stack gap={5}>
+          {tree.map((node) => (
+            <TreeNode
+              key={node.id}
+              node={node}
+              depth={0}
+              shareId={shareId}
+              spaceSlug={spaceSlug}
+              t={t}
+            />
+          ))}
+        </Stack>
+        {total > LARGE_TREE_THRESHOLD && (
+          <Text c="dimmed" size="xs" pt="xs">
+            {t("Showing {{count}} subpages", { count: total })}
+          </Text>
+        )}
+      </div>
+    </NodeViewWrapper>
+  );
+}

apps/client/src/features/editor/components/subpages/subpages-view.utils.test.ts

@@ -0,0 +1,114 @@
+import { describe, it, expect } from "vitest";
+import {
+  buildSubtree,
+  countNodes,
+  mapSharedNodes,
+  SubpageNode,
+} from "./subpages-view.utils";
+import { IPage } from "@/features/page/types/page.types";
+
+// Minimal IPage fixture — buildSubtree only reads id/slugId/title/icon/position/
+// parentPageId. `position` keys are fractional-indexing strings (lexicographic).
+const page = (p: Partial<IPage> & { id: string }): IPage =>
+  ({
+    slugId: `slug-${p.id}`,
+    title: `Title ${p.id}`,
+    icon: undefined,
+    position: "a0",
+    parentPageId: null,
+    ...p,
+  }) as IPage;
+
+const ids = (nodes: SubpageNode[]): string[] => nodes.map((n) => n.id);
+
+describe("buildSubtree", () => {
+  it("nests children under the root and excludes the root itself", () => {
+    const pages = [
+      page({ id: "root" }),
+      page({ id: "a", parentPageId: "root", position: "a0" }),
+      page({ id: "b", parentPageId: "root", position: "a1" }),
+      page({ id: "a1", parentPageId: "a", position: "a0" }),
+    ];
+    const tree = buildSubtree(pages, "root");
+    // Root is not rendered; only its descendants.
+    expect(ids(tree)).toEqual(["a", "b"]);
+    expect(ids(tree[0].children)).toEqual(["a1"]);
+    expect(tree[1].children).toEqual([]);
+  });
+
+  it("sorts each level by position", () => {
+    const pages = [
+      page({ id: "root" }),
+      page({ id: "z", parentPageId: "root", position: "a2" }),
+      page({ id: "x", parentPageId: "root", position: "a0" }),
+      page({ id: "y", parentPageId: "root", position: "a1" }),
+    ];
+    expect(ids(buildSubtree(pages, "root"))).toEqual(["x", "y", "z"]);
+  });
+
+  it("returns [] when the root is absent from the page set", () => {
+    const pages = [page({ id: "a", parentPageId: "missing-root" })];
+    expect(buildSubtree(pages, "missing-root")).toEqual([]);
+  });
+
+  it("silently drops a node whose parent is absent (unreachable parent)", () => {
+    const pages = [
+      page({ id: "root" }),
+      page({ id: "ok", parentPageId: "root" }),
+      page({ id: "orphan", parentPageId: "ghost" }), // parent not in the set
+    ];
+    expect(ids(buildSubtree(pages, "root"))).toEqual(["ok"]);
+  });
+
+  it("guards against self-parenting / attaching the root", () => {
+    const pages = [
+      // A (defensive) self-parented root must not attach to itself.
+      page({ id: "root", parentPageId: "root" }),
+      page({ id: "a", parentPageId: "root" }),
+    ];
+    const tree = buildSubtree(pages, "root");
+    expect(ids(tree)).toEqual(["a"]);
+  });
+
+  it("returns [] for empty input", () => {
+    expect(buildSubtree([], "root")).toEqual([]);
+  });
+});
+
+describe("countNodes", () => {
+  it("counts every descendant across all levels", () => {
+    const tree: SubpageNode[] = [
+      {
+        id: "a",
+        slugId: "s",
+        title: "A",
+        children: [
+          { id: "a1", slugId: "s", title: "A1", children: [] },
+          { id: "a2", slugId: "s", title: "A2", children: [] },
+        ],
+      },
+      { id: "b", slugId: "s", title: "B", children: [] },
+    ];
+    expect(countNodes(tree)).toBe(4);
+    expect(countNodes([])).toBe(0);
+  });
+});
+
+describe("mapSharedNodes", () => {
+  it("remaps value->id / name->title and keeps nested children", () => {
+    const shared = [
+      {
+        value: "p1",
+        slugId: "s1",
+        name: "Parent",
+        icon: "📁",
+        children: [
+          { value: "c1", slugId: "sc1", name: "Child", children: [] },
+        ],
+      },
+    ] as any;
+    const mapped = mapSharedNodes(shared);
+    expect(mapped[0]).toMatchObject({ id: "p1", slugId: "s1", title: "Parent", icon: "📁" });
+    expect(mapped[0].children[0]).toMatchObject({ id: "c1", title: "Child" });
+  });
+});

apps/client/src/features/editor/components/subpages/subpages-view.utils.ts

@@ -0,0 +1,83 @@
+import { sortPositionKeys } from "@/features/page/tree/utils/utils";
+import { IPage } from "@/features/page/types/page.types";
+import { SharedPageTreeNode } from "@/features/share/utils";
+
+// Normalized node shared by the flat and recursive subpages renderers so the
+// same link/icon markup works for both API pages and shared-tree nodes.
+export interface SubpageNode {
+  id: string;
+  slugId: string;
+  title: string;
+  icon?: string;
+  children: SubpageNode[];
+}
+
+// Subpage node carrying `position` so each level can be sorted in place.
+export type SubpageNodeWithPos = SubpageNode & {
+  position: string;
+  children: SubpageNodeWithPos[];
+};
+
+/**
+ * Build a nested subtree (the current page's descendants) from the flat `IPage[]`
+ * the `/pages/tree` endpoint returns. Attaches each node to its parent by
+ * `parentPageId`, drops the root itself, and sorts every level by `position`.
+ *
+ * Guards only against SELF-PARENTING and attaching the root (`p.id !== rootId`) —
+ * NOT against multi-node `parentPageId` cycles. Those cannot occur here: the
+ * server rejects cyclic moves, and the recursive `getPageAndDescendants` CTE that
+ * produces this list would itself loop before reaching the client, so the flat
+ * input is acyclic by construction. A node whose `parentPageId` points outside
+ * the result set (an unreachable parent) is silently dropped — it is, by
+ * definition, not a descendant of the root being rendered.
+ */
+export function buildSubtree(pages: IPage[], rootId: string): SubpageNode[] {
+  const byId = new Map<string, SubpageNodeWithPos>(
+    pages.map((p) => [
+      p.id,
+      {
+        id: p.id,
+        slugId: p.slugId,
+        title: p.title,
+        icon: p.icon,
+        position: p.position,
+        children: [],
+      },
+    ]),
+  );
+
+  for (const p of pages) {
+    const node = byId.get(p.id);
+    const parent = p.parentPageId ? byId.get(p.parentPageId) : undefined;
+    if (node && parent && p.id !== rootId) {
+      parent.children.push(node);
+    }
+  }
+
+  const sortRecursive = (
+    nodes: SubpageNodeWithPos[],
+  ): SubpageNodeWithPos[] => {
+    const sorted = sortPositionKeys(nodes) as SubpageNodeWithPos[];
+    sorted.forEach((n) => sortRecursive(n.children));
+    return sorted;
+  };
+
+  const root = byId.get(rootId);
+  return root ? sortRecursive(root.children) : [];
+}
+
+// Map shared-tree nodes (already nested) onto the normalized SubpageNode shape.
+export function mapSharedNodes(nodes: SharedPageTreeNode[]): SubpageNode[] {
+  return nodes.map((node) => ({
+    id: node.value,
+    slugId: node.slugId,
+    title: node.name,
+    icon: node.icon,
+    children: node.children ? mapSharedNodes(node.children) : [],
+  }));
+}
+
+// Count every descendant in a normalized subtree.
+export function countNodes(nodes: SubpageNode[]): number {
+  return nodes.reduce((acc, n) => acc + 1 + countNodes(n.children), 0);
+}

apps/client/src/features/editor/extensions/slash-command.ts

@@ -14,6 +14,10 @@ const Command = Extension.create({
     return {
       suggestion: {
         char: '/',
+        // Keep the query alive through spaces so multi-word item labels
+        // (e.g. "Heading 1", "Math block") match instead of terminating the
+        // query and leaving literal "/Heading 1" text in the document.
+        allowSpaces: true,
         command: ({ editor, range, props }) => {
           props.command({ editor, range, props });
         },
@@ -23,7 +27,22 @@ const Command = Extension.create({
           if ($from.parent.type.name === 'codeBlock') {
             return false;
           }
-          return true;
+          // With `allowSpaces: true` a query that contains a space no longer
+          // terminates the suggestion on its own, so a space-bearing query that
+          // matches nothing (e.g. "/todo abc") would otherwise keep an empty
+          // popup logically active and leave the literal "/todo abc" text in the
+          // document, only dismissable via Escape. Deactivate the suggestion when
+          // no item matches the current query: returning false here removes the
+          // decoration, fires the popup's `onExit`, and lets subsequent keystrokes
+          // pass through normally — restoring the pre-`allowSpaces` behavior for
+          // non-matching queries while keeping multi-word matches (e.g.
+          // "/Heading 1") working.
+          const query = state.doc.textBetween(range.from + 1, range.to);
+          const groups = getSuggestionItems({ query });
+          const hasMatches = Object.values(groups).some(
+            (items) => items.length > 0,
+          );
+          return hasMatches;
         },
       } as Partial<SuggestionOptions>,
     };

apps/client/src/features/editor/gitmost/gitmost-global-bridge.tsx

@@ -0,0 +1,316 @@
+import { useEffect, useRef } from "react";
+import { useNavigate } from "react-router-dom";
+import { getDefaultStore } from "jotai";
+import { WebSocketStatus } from "@hocuspocus/provider";
+import { Editor } from "@tiptap/core";
+import {
+  pageEditorAtom,
+  yjsConnectionStatusAtom,
+} from "@/features/editor/atoms/editor-atoms.ts";
+import {
+  getSpaceById,
+  getSpaces,
+} from "@/features/space/services/space-service.ts";
+import {
+  createPage,
+  getSidebarPages,
+} from "@/features/page/services/page-service.ts";
+import { buildPageUrl } from "@/features/page/page.utils.ts";
+import {
+  GitmostBridge,
+  GitmostCreatePagePayload,
+  GitmostCreatePageResult,
+  GitmostListPagesPayload,
+  GitmostListPagesResult,
+  GitmostListSpacesResult,
+  gitmostDecodePayloadToFile,
+  gitmostUploadFileToEditor,
+} from "@/features/editor/gitmost/gitmost-recording.ts";
+
+// How long to wait for a freshly-navigated page's editor to mount, become
+// editable, and connect its Yjs provider before giving up.
+const GITMOST_EDITOR_READY_TIMEOUT_MS = 20000;
+const GITMOST_EDITOR_POLL_INTERVAL_MS = 120;
+
+// Poll the (default) jotai store until the editor for `pageId` is mounted,
+// editable and its Yjs provider is connected. Resolves the live editor, or null
+// on timeout. Reuses pageEditorAtom + yjsConnectionStatusAtom — the same signals
+// PageEditor maintains. The storage.pageId check guards against matching a stale
+// editor left over from the previously-open page.
+function gitmostWaitForEditor(
+  pageId: string,
+  timeoutMs: number,
+): Promise<Editor | null> {
+  const store = getDefaultStore();
+  const deadline = Date.now() + timeoutMs;
+  return new Promise((resolve) => {
+    const check = () => {
+      const editor = store.get(pageEditorAtom) as Editor | null;
+      const yjsStatus = store.get(yjsConnectionStatusAtom);
+      // `storage.pageId` is a custom field PageEditor.onCreate sets; it is not
+      // part of Tiptap's Storage type, so read it through an indexed cast.
+      const editorPageId = (
+        editor?.storage as unknown as Record<string, unknown> | undefined
+      )?.pageId;
+      const ready =
+        !!editor &&
+        !editor.isDestroyed &&
+        editor.isEditable &&
+        editorPageId === pageId &&
+        yjsStatus === WebSocketStatus.Connected;
+      if (ready) {
+        resolve(editor);
+        return;
+      }
+      if (Date.now() >= deadline) {
+        resolve(null);
+        return;
+      }
+      setTimeout(check, GITMOST_EDITOR_POLL_INTERVAL_MS);
+    };
+    check();
+  });
+}
+
+// Registers the global gitmost bridge methods that work WITHOUT an open page
+// (listSpaces / listPages / createPageWithRecording). Mounted once at the
+// app-shell level so the react-router navigate fn and the api-client are
+// available even when no page editor is mounted. insertRecording stays in
+// PageEditor (tied to the live editable editor). Renders nothing.
+export default function GitmostGlobalBridge() {
+  const navigate = useNavigate();
+  // The effect registers the bridge once; reading the latest navigate via a ref
+  // avoids a stale closure if react-router hands back a new function identity.
+  const navigateRef = useRef(navigate);
+  useEffect(() => {
+    navigateRef.current = navigate;
+  }, [navigate]);
+
+  useEffect(() => {
+    const w = window as unknown as { gitmost?: Partial<GitmostBridge> };
+    w.gitmost = w.gitmost || {};
+    // Advertise the bridge version even before any page editor mounts; do not
+    // clobber a value already set by an active PageEditor.
+    if (typeof w.gitmost.version !== "number") w.gitmost.version = 1;
+
+    const listSpaces = async (): Promise<GitmostListSpacesResult> => {
+      try {
+        const res = await getSpaces({ limit: 100 });
+        const spaces = (res?.items ?? []).map((s) => ({
+          id: s.id,
+          name: s.name,
+        }));
+        // v1 returns only the first page; flag truncation so the host knows
+        // more spaces exist.
+        const truncated = Boolean(res?.meta?.hasNextPage);
+        return { ok: true, spaces, truncated };
+      } catch (err: any) {
+        console.error("[gitmost] listSpaces failed", err);
+        return {
+          ok: false,
+          error: "list-failed",
+          message:
+            err?.response?.data?.message ??
+            err?.message ??
+            "Failed to list spaces",
+        };
+      }
+    };
+
+    const listPages = async (
+      payload: GitmostListPagesPayload,
+    ): Promise<GitmostListPagesResult> => {
+      try {
+        const spaceId = payload?.spaceId;
+        if (!spaceId) {
+          return {
+            ok: false,
+            error: "bad-args",
+            message: "spaceId is required",
+          };
+        }
+        const res = await getSidebarPages({
+          spaceId,
+          pageId: payload?.parentPageId,
+          limit: 100,
+        });
+        const pages = (res?.items ?? []).map((p) => ({
+          id: p.id,
+          title: p.title,
+          hasChildren: Boolean(p.hasChildren),
+        }));
+        // v1 returns only the first page of children; flag truncation so the
+        // host knows more exist.
+        const truncated = Boolean(res?.meta?.hasNextPage);
+        return { ok: true, pages, truncated };
+      } catch (err: any) {
+        console.error("[gitmost] listPages failed", err);
+        return {
+          ok: false,
+          error: "list-failed",
+          message:
+            err?.response?.data?.message ??
+            err?.message ??
+            "Failed to list pages",
+        };
+      }
+    };
+
+    const createPageWithRecording = async (
+      payload: GitmostCreatePagePayload,
+    ): Promise<GitmostCreatePageResult> => {
+      try {
+        const { spaceId, parentPageId, title, base64, filename, mimeType } =
+          payload || ({} as GitmostCreatePagePayload);
+
+        if (!spaceId) {
+          return {
+            ok: false,
+            error: "no-space",
+            message: "spaceId is required",
+          };
+        }
+
+        // Validate/decode the recording BEFORE creating the page so a bad
+        // payload never leaves an empty junk page behind. Per the createPage
+        // error contract, any decode failure collapses to "insert-failed" (the
+        // real reason is kept in `message`).
+        const decoded = gitmostDecodePayloadToFile({
+          base64,
+          filename,
+          mimeType,
+        });
+        if ("error" in decoded) {
+          return {
+            ok: false,
+            error: "insert-failed",
+            message: decoded.error.message ?? "Invalid recording payload",
+          };
+        }
+
+        // Resolve the space slug (needed for router navigation); also a
+        // permission/existence probe -> no-space on failure.
+        let spaceSlug: string | undefined;
+        try {
+          const space = await getSpaceById(spaceId);
+          spaceSlug = space?.slug;
+        } catch (err: any) {
+          console.error("[gitmost] resolve space failed", err);
+          return {
+            ok: false,
+            error: "no-space",
+            message:
+              err?.response?.data?.message ??
+              err?.message ??
+              "Space not found or no access",
+          };
+        }
+        if (!spaceSlug) {
+          return {
+            ok: false,
+            error: "no-space",
+            message: "Space not found or no access",
+          };
+        }
+
+        // Create the page (REST). Default title when none is provided.
+        const defaultTitle = `Recording ${new Date().toLocaleString()}`;
+        let page;
+        try {
+          // `spaceId` is accepted by the create-page endpoint but is not part of
+          // the shared IPage type; cast to satisfy the createPage signature.
+          page = await createPage({
+            spaceId,
+            parentPageId: parentPageId ?? undefined,
+            title: title ?? defaultTitle,
+          } as any);
+        } catch (err: any) {
+          console.error("[gitmost] createPage failed", err);
+          return {
+            ok: false,
+            error: "create-failed",
+            message:
+              err?.response?.data?.message ??
+              err?.message ??
+              "Failed to create page",
+          };
+        }
+        if (!page?.id || !page?.slugId) {
+          return {
+            ok: false,
+            error: "create-failed",
+            message: "Failed to create page",
+          };
+        }
+
+        // Reset the shared Yjs status before navigating. The atom is global and
+        // is NOT reset when a PageEditor unmounts, so it can still hold
+        // "connected" from a previously-open page; clearing it ensures the
+        // readiness gate below waits for the NEW page's provider to connect.
+        getDefaultStore().set(yjsConnectionStatusAtom, "");
+
+        // Navigate via the router (no full reload).
+        navigateRef.current(buildPageUrl(spaceSlug, page.slugId, page.title));
+
+        // Wait for the new page's editor: mounted, editable, Yjs connected.
+        const editor = await gitmostWaitForEditor(
+          page.id,
+          GITMOST_EDITOR_READY_TIMEOUT_MS,
+        );
+        if (!editor) {
+          return {
+            ok: false,
+            error: "editor-timeout",
+            message: "Editor was not ready in time",
+            // Return pageId so the host can still surface the created page.
+            pageId: page.id,
+          };
+        }
+
+        // Same insert path as insertRecording.
+        const result = await gitmostUploadFileToEditor(
+          editor,
+          page.id,
+          decoded.file,
+        );
+        if (!result.ok) {
+          return {
+            ok: false,
+            error: "insert-failed",
+            message: result.message ?? "Failed to insert recording",
+            pageId: page.id,
+          };
+        }
+        return { ok: true, pageId: page.id };
+      } catch (err: any) {
+        console.error("[gitmost] createPageWithRecording failed", err);
+        return {
+          ok: false,
+          error: "insert-failed",
+          message:
+            err?.response?.data?.message ??
+            err?.message ??
+            "Failed to create page with recording",
+        };
+      }
+    };
+
+    w.gitmost.listSpaces = listSpaces;
+    w.gitmost.listPages = listPages;
+    w.gitmost.createPageWithRecording = createPageWithRecording;
+
+    return () => {
+      // Only remove our own registrations (defensive against a future second
+      // mount having replaced them).
+      if (w.gitmost) {
+        if (w.gitmost.listSpaces === listSpaces) delete w.gitmost.listSpaces;
+        if (w.gitmost.listPages === listPages) delete w.gitmost.listPages;
+        if (w.gitmost.createPageWithRecording === createPageWithRecording) {
+          delete w.gitmost.createPageWithRecording;
+        }
+      }
+    };
+  }, []);
+
+  return null;
+}

apps/client/src/features/editor/gitmost/gitmost-recording.ts

@@ -0,0 +1,263 @@
+import { Editor } from "@tiptap/core";
+import { getFileUploadSizeLimit } from "@/lib/config.ts";
+import { formatBytes } from "@/lib";
+import { uploadAudioAction } from "@/features/editor/components/audio/upload-audio-action.tsx";
+
+// --- gitmost native bridge: shared types & helpers ------------------------
+// Stable JS-API on `window.gitmost` for the native host (gitmost.app /
+// WKWebView). This module holds the parts shared between the open-page bridge
+// (insertRecording, in page-editor.tsx) and the global bridge (gitmost-global-
+// bridge.tsx): payload decoding/validation and the audio-insert pipeline, so
+// both apply identical rules without depending on editor internals.
+
+export interface GitmostInsertRecordingPayload {
+  base64: string; // raw file bytes, base64 (no data: prefix)
+  filename: string;
+  mimeType: string; // must be an audio/* type
+}
+
+export interface GitmostInsertRecordingResult {
+  ok: boolean;
+  attachmentId?: string;
+  // Machine-readable code: "no-editor" | "bad-type" | "too-large" | "insert-failed"
+  error?: string;
+  message?: string; // human-readable, may be surfaced by the host
+}
+
+export interface GitmostSpaceSummary {
+  id: string;
+  name: string;
+}
+
+export interface GitmostListSpacesResult {
+  ok: boolean;
+  spaces?: GitmostSpaceSummary[];
+  // v1 lists only the first page of spaces; true when more exist server-side.
+  truncated?: boolean;
+  error?: string;
+  message?: string;
+}
+
+export interface GitmostListPagesPayload {
+  spaceId: string;
+  parentPageId?: string;
+}
+
+export interface GitmostPageSummary {
+  id: string;
+  title: string;
+  hasChildren: boolean;
+}
+
+export interface GitmostListPagesResult {
+  ok: boolean;
+  pages?: GitmostPageSummary[];
+  // v1 lists only the first page of children; true when more exist server-side.
+  truncated?: boolean;
+  error?: string;
+  message?: string;
+}
+
+export interface GitmostCreatePagePayload {
+  spaceId: string;
+  parentPageId?: string; // omit/null = space root
+  title?: string; // default "Recording <timestamp>"
+  base64: string;
+  filename: string;
+  mimeType: string;
+}
+
+export interface GitmostCreatePageResult {
+  ok: boolean;
+  pageId?: string;
+  // Machine-readable code: "no-space" | "create-failed" | "editor-timeout" | "insert-failed"
+  error?: string;
+  message?: string;
+}
+
+// Full bridge surface exposed on `window.gitmost`. Writers attach a subset
+// (Partial), so readonly/share pages and no-page states are valid.
+export interface GitmostBridge {
+  ready: boolean;
+  version: number;
+  insertRecording: (
+    payload: GitmostInsertRecordingPayload,
+  ) => Promise<GitmostInsertRecordingResult>;
+  listSpaces: () => Promise<GitmostListSpacesResult>;
+  listPages: (payload: GitmostListPagesPayload) => Promise<GitmostListPagesResult>;
+  createPageWithRecording: (
+    payload: GitmostCreatePagePayload,
+  ) => Promise<GitmostCreatePageResult>;
+}
+
+// Estimate decoded byte length from a base64 string WITHOUT decoding it, so an
+// oversized payload can be rejected before the buffer is allocated.
+export function gitmostEstimateBase64Bytes(base64: string): number {
+  const len = base64.length;
+  if (len === 0) return 0;
+  const padding = base64.endsWith("==") ? 2 : base64.endsWith("=") ? 1 : 0;
+  return Math.floor((len * 3) / 4) - padding;
+}
+
+// Decode a base64 string into bytes in fixed-size chunks. Call recordings can
+// be tens of MB; slicing on 4-char boundaries (each slice decodes to whole
+// bytes, no carry) keeps each atob() call bounded. Assumes unwrapped base64
+// with no embedded whitespace (per the native-host contract). Throws
+// InvalidCharacterError on malformed input.
+export function gitmostBase64ToBytes(base64: string): Uint8Array<ArrayBuffer> {
+  const CHUNK = 0x8000 * 4; // multiple of 4 base64 chars
+  const parts: Uint8Array[] = [];
+  let total = 0;
+  for (let i = 0; i < base64.length; i += CHUNK) {
+    const binary = atob(base64.slice(i, i + CHUNK));
+    const bytes = new Uint8Array(binary.length);
+    for (let j = 0; j < binary.length; j++) {
+      bytes[j] = binary.charCodeAt(j);
+    }
+    parts.push(bytes);
+    total += bytes.length;
+  }
+  // Back the result with an explicit ArrayBuffer so the view is typed
+  // Uint8Array<ArrayBuffer> (not ArrayBufferLike), which `new File([...])`
+  // accepts as a BlobPart under the lib.dom typings.
+  const out = new Uint8Array(new ArrayBuffer(total));
+  let offset = 0;
+  for (const part of parts) {
+    out.set(part, offset);
+    offset += part.length;
+  }
+  return out;
+}
+
+// Decode + validate a recording payload into a File, or return an error result.
+// Shared so insertRecording (open page) and createPageWithRecording (no page
+// open) apply identical validation. Error codes: "bad-type" | "too-large" |
+// "insert-failed".
+export function gitmostDecodePayloadToFile(
+  payload: GitmostInsertRecordingPayload,
+): { file: File } | { error: GitmostInsertRecordingResult } {
+  const { filename, mimeType } =
+    payload || ({} as GitmostInsertRecordingPayload);
+  let base64 = payload?.base64;
+
+  if (typeof mimeType !== "string" || !mimeType.startsWith("audio/")) {
+    return {
+      error: { ok: false, error: "bad-type", message: "Not an audio file" },
+    };
+  }
+  if (typeof base64 !== "string" || base64.length === 0) {
+    return {
+      error: { ok: false, error: "insert-failed", message: "Empty payload" },
+    };
+  }
+
+  // Defensively strip an accidental data:*;base64, prefix.
+  const marker = base64.indexOf("base64,");
+  if (base64.startsWith("data:") && marker !== -1) {
+    base64 = base64.slice(marker + "base64,".length);
+  }
+
+  const sizeLimit = getFileUploadSizeLimit();
+  // Reject oversized payloads before allocating the decode buffer.
+  if (gitmostEstimateBase64Bytes(base64) > sizeLimit) {
+    return {
+      error: {
+        ok: false,
+        error: "too-large",
+        message: `File exceeds the ${formatBytes(sizeLimit)} attachment limit`,
+      },
+    };
+  }
+
+  let bytes: Uint8Array<ArrayBuffer>;
+  try {
+    bytes = gitmostBase64ToBytes(base64);
+  } catch (decodeErr: any) {
+    return {
+      error: {
+        ok: false,
+        error: "insert-failed",
+        message: decodeErr?.message ?? "Invalid base64 payload",
+      },
+    };
+  }
+
+  const file = new File([bytes], filename || "recording", { type: mimeType });
+
+  // Exact size check (the pre-decode estimate is approximate).
+  if (file.size > sizeLimit) {
+    return {
+      error: {
+        ok: false,
+        error: "too-large",
+        message: `File exceeds the ${formatBytes(sizeLimit)} attachment limit`,
+      },
+    };
+  }
+
+  return { file };
+}
+
+// Insert an already-decoded recording File into a live editor via the existing
+// audio pipeline (placeholder -> POST /api/files/upload -> `audio` node,
+// Yjs-synced). Returns the attachment id on success.
+export async function gitmostUploadFileToEditor(
+  editor: Editor,
+  pageId: string,
+  file: File,
+): Promise<GitmostInsertRecordingResult> {
+  try {
+    // Insert at the cursor, falling back to the end of the document.
+    const pos = editor.state.selection?.to ?? editor.state.doc.content.size;
+
+    // uploadAudioAction returns the attachment on success and undefined when
+    // the upload failed (the pipeline swallows the upload error and shows its
+    // own notification).
+    const attachment = (await (uploadAudioAction(
+      file,
+      editor,
+      pos,
+      pageId,
+    ) as unknown as Promise<{ id?: string } | undefined>));
+
+    if (attachment?.id) {
+      return { ok: true, attachmentId: attachment.id };
+    }
+    return { ok: false, error: "insert-failed", message: "Upload failed" };
+  } catch (err: any) {
+    // Never swallow: log the raw error and surface the real reason.
+    console.error("[gitmost] audio upload into editor failed", err);
+    return {
+      ok: false,
+      error: "insert-failed",
+      message: err?.response?.data?.message ?? err?.message ?? "Insert failed",
+    };
+  }
+}
+
+// Full insert path used by the open-page bridge (insertRecording): guard the
+// editor, validate/decode the payload, then upload. Never throws — resolves to
+// a result code.
+export async function gitmostInsertRecordingIntoEditor(
+  editor: Editor | null,
+  pageId: string,
+  payload: GitmostInsertRecordingPayload,
+): Promise<GitmostInsertRecordingResult> {
+  try {
+    // Only a live, editable editor may receive a recording.
+    if (!editor || editor.isDestroyed || !editor.isEditable) {
+      return { ok: false, error: "no-editor", message: "No editable page open" };
+    }
+    const decoded = gitmostDecodePayloadToFile(payload);
+    if ("error" in decoded) return decoded.error;
+    return await gitmostUploadFileToEditor(editor, pageId, decoded.file);
+  } catch (err: any) {
+    // The bridge must never throw — surface any unexpected failure as a code.
+    console.error("[gitmost] insertRecording failed", err);
+    return {
+      ok: false,
+      error: "insert-failed",
+      message: err?.response?.data?.message ?? err?.message ?? "Insert failed",
+    };
+  }
+}

apps/client/src/features/editor/page-editor.tsx

@@ -49,6 +49,7 @@ import { TableHandlesLayer } from "@/features/editor/components/table/handle/tab
 import ImageMenu from "@/features/editor/components/image/image-menu.tsx";
 import CalloutMenu from "@/features/editor/components/callout/callout-menu.tsx";
 import VideoMenu from "@/features/editor/components/video/video-menu.tsx";
+import AudioMenu from "@/features/editor/components/audio/audio-menu.tsx";
 import PdfMenu from "@/features/editor/components/pdf/pdf-menu.tsx";
 import SubpagesMenu from "@/features/editor/components/subpages/subpages-menu.tsx";
 import {
@@ -65,6 +66,12 @@ import { queryClient } from "@/main.tsx";
 import { IPage } from "@/features/page/types/page.types.ts";
 import { useParams } from "react-router-dom";
 import { extractPageSlugId, platformModifierKey } from "@/lib";
+import {
+  GitmostBridge,
+  GitmostInsertRecordingPayload,
+  GitmostInsertRecordingResult,
+  gitmostInsertRecordingIntoEditor,
+} from "@/features/editor/gitmost/gitmost-recording.ts";
 import { FIVE_MINUTES } from "@/lib/constants.ts";
 import { PageEditMode } from "@/features/user/types/user.types.ts";
 import { jwtDecode } from "jwt-decode";
@@ -113,6 +120,13 @@ export default function PageEditor({
   );
   const menuContainerRef = useRef(null);
   const { data: collabQuery, refetch: refetchCollabToken } = useCollabToken();
+  // Always holds the latest collab token. The provider effect below runs once
+  // per pageId, so a handler created inside it would otherwise close over a
+  // stale `collabQuery`. Reading the ref gives the current token instead.
+  const collabTokenRef = useRef<string | undefined>(undefined);
+  useEffect(() => {
+    collabTokenRef.current = collabQuery?.token;
+  }, [collabQuery?.token]);
   const { isIdle, resetIdle } = useIdle(FIVE_MINUTES, { initialState: false });
   const documentState = useDocumentVisibility();
   const { pageSlug } = useParams();
@@ -167,20 +181,33 @@ export default function PageEditor({
         }
       };
       const onAuthenticationFailedHandler = () => {
-        const payload = jwtDecode(collabQuery?.token);
-        const now = Date.now().valueOf() / 1000;
-        const isTokenExpired = now >= payload.exp;
-        if (isTokenExpired) {
-          refetchCollabToken().then((result) => {
-            if (result.data?.token) {
-              socket.disconnect();
-              setTimeout(() => {
-                remote.configuration.token = result.data.token;
-                socket.connect();
-              }, 100);
-            }
-          });
+        // Read the latest token via the ref (the closure-captured `collabQuery`
+        // may be stale). Guard the decode: a missing or unparseable token must
+        // not throw "Invalid token specified" and should trigger a refresh so
+        // the editor reconnects even when the initial token fetch failed.
+        const token = collabTokenRef.current;
+        let needsRefresh = true; // no/unparseable token -> fetch a fresh one and reconnect
+        if (token) {
+          try {
+            // A token that decodes but lacks a numeric `exp` must be treated as
+            // expired (`Date.now()/1000 >= undefined` is `false`, which would
+            // otherwise skip the reconnect), so refresh on any missing/non-number exp.
+            const exp = jwtDecode<{ exp?: number }>(token).exp;
+            needsRefresh = typeof exp !== "number" || Date.now() / 1000 >= exp;
+          } catch {
+            needsRefresh = true;
+          }
         }
+        if (!needsRefresh) return;
+        refetchCollabToken().then((result) => {
+          if (result.data?.token) {
+            socket.disconnect();
+            setTimeout(() => {
+              remote.configuration.token = result.data.token;
+              socket.connect();
+            }, 100);
+          }
+        });
       };
       const remote = new HocuspocusProvider({
         websocketProvider: socket,
@@ -333,6 +360,39 @@ export default function PageEditor({
     },
   });
 
+  // Expose the gitmost native bridge only while an editable page editor is
+  // mounted. Registering/tearing down here ties `ready` + `insertRecording`
+  // to the lifetime of the current editable editor: readonly/share pages and
+  // page switches re-run this effect (deps: live editable flag + pageId),
+  // recreating the closure over the active editor/pageId so a recording always
+  // targets whatever page is active at call time.
+  useEffect(() => {
+    if (!editor || !editor.isEditable) return;
+
+    const w = window as unknown as { gitmost?: Partial<GitmostBridge> };
+    w.gitmost = w.gitmost || {};
+    w.gitmost.version = 1;
+    w.gitmost.ready = true;
+
+    const insertRecording = (
+      payload: GitmostInsertRecordingPayload,
+    ): Promise<GitmostInsertRecordingResult> =>
+      gitmostInsertRecordingIntoEditor(editor, pageId, payload);
+
+    w.gitmost.insertRecording = insertRecording;
+
+    return () => {
+      // Only tear down if our registration is still the active one. With
+      // React's mount-before-unmount ordering, a newer PageEditor instance may
+      // have already replaced the bridge; clearing it here would disable the
+      // live editor's bridge.
+      if (w.gitmost && w.gitmost.insertRecording === insertRecording) {
+        w.gitmost.ready = false;
+        delete w.gitmost.insertRecording;
+      }
+    };
+  }, [editor, pageId, editorIsEditable]);
+
   const debouncedUpdateContent = useDebouncedCallback((newContent: any) => {
     const pageData = queryClient.getQueryData<IPage>(["pages", slugId]);
 
@@ -441,6 +501,7 @@ export default function PageEditor({
                 <TableHandlesLayer editor={editor} />
                 <ImageMenu editor={editor} />
                 <VideoMenu editor={editor} />
+                <AudioMenu editor={editor} />
                 <PdfMenu editor={editor} />
                 <CalloutMenu editor={editor} />
                 <SubpagesMenu editor={editor} />

apps/client/src/features/editor/styles/code.css

@@ -1,5 +1,9 @@
 .ProseMirror {
   .codeBlock {
+    /* #146: flex column so the menu (rendered AFTER <pre> in the DOM, so the
+       editable contentDOM is first) is lifted back above the code via `order`. */
+    display: flex;
+    flex-direction: column;
     padding: 4px;
     border-radius: var(--mantine-radius-default);
     background-color: light-dark(var(--mantine-color-gray-0),  var(--mantine-color-dark-8));

apps/client/src/features/favorite/queries/favorite-query.ts

@@ -13,6 +13,8 @@ import {
   ToggleFavoriteParams,
 } from "../services/favorite-service";
 import { FavoriteType } from "../types/favorite.types";
+import { notifications } from "@mantine/notifications";
+import { useTranslation } from "react-i18next";
 
 export function useFavoritesQuery(type?: FavoriteType, spaceId?: string) {
   return useInfiniteQuery({
@@ -46,6 +48,7 @@ function getEntityId(variables: ToggleFavoriteParams): string | undefined {
 
 export function useAddFavoriteMutation() {
   const queryClient = useQueryClient();
+  const { t } = useTranslation();
 
   return useMutation<void, Error, ToggleFavoriteParams>({
     mutationFn: (data) => addFavorite(data),
@@ -64,12 +67,15 @@ export function useAddFavoriteMutation() {
       queryClient.invalidateQueries({
         queryKey: ["favorites", variables.type],
       });
+      // Notify on success so the action gives visible feedback (issue #128)
+      notifications.show({ message: t("Added to favorites") });
     },
   });
 }
 
 export function useRemoveFavoriteMutation() {
   const queryClient = useQueryClient();
+  const { t } = useTranslation();
 
   return useMutation<void, Error, ToggleFavoriteParams>({
     mutationFn: (data) => removeFavorite(data),
@@ -87,6 +93,8 @@ export function useRemoveFavoriteMutation() {
       queryClient.invalidateQueries({
         queryKey: ["favorites", variables.type],
       });
+      // Notify on success so the action gives visible feedback (issue #128)
+      notifications.show({ message: t("Removed from favorites") });
     },
   });
 }

apps/client/src/features/group/components/create-group-form.tsx

@@ -8,12 +8,10 @@ import { MultiUserSelect } from "@/features/group/components/multi-user-select.t
 import { useTranslation } from "react-i18next";
 import { zod4Resolver } from 'mantine-form-zod-resolver';
 
-const formSchema = z.object({
-  name: z.string().trim().min(2).max(100),
-  description: z.string().max(500),
-});
-
-type FormValues = z.infer<typeof formSchema>;
+type FormValues = {
+  name: string;
+  description: string;
+};
 
 export function CreateGroupForm() {
   const { t } = useTranslation();
@@ -21,6 +19,18 @@ export function CreateGroupForm() {
   const [userIds, setUserIds] = useState<string[]>([]);
   const navigate = useNavigate();
 
+  // Build the schema with friendly, translated validation messages (issue #130)
+  const formSchema = z.object({
+    name: z
+      .string()
+      .trim()
+      .min(2, t("Group name must be at least 2 characters"))
+      .max(100, t("Group name must be 100 characters or fewer")),
+    description: z
+      .string()
+      .max(500, t("Description must be 500 characters or fewer")),
+  });
+
   const form = useForm<FormValues>({
     validate: zod4Resolver(formSchema),
     initialValues: {

apps/client/src/features/group/components/group-members.tsx

@@ -41,7 +41,7 @@ export default function GroupMembersList() {
         </Text>
       ),
       centered: true,
-      labels: { confirm: t("Delete"), cancel: t("Cancel") },
+      labels: { confirm: t("Remove"), cancel: t("Cancel") },
       confirmProps: { color: "red" },
       onConfirm: () => onRemove(userId),
     });

apps/client/src/features/home/components/can-create-page.test.ts

@@ -0,0 +1,42 @@
+import { describe, it, expect } from "vitest";
+import { canCreatePage } from "./can-create-page.ts";
+import { ISpace } from "@/features/space/types/space.types.ts";
+import { SpaceRole } from "@/lib/types.ts";
+
+// Unit tests for `canCreatePage` (new-note-button.tsx). The home screen has no
+// active space, so the "New note" button resolves its target from the user's
+// writable spaces. This predicate mirrors the server space-ability mapping
+// (ADMIN/WRITER can manage pages, READER is read-only). The /spaces list endpoint
+// only returns membership.role (not CASL permissions), so a regression here would
+// either hide the button for legitimate writers or offer it to read-only members.
+
+function spaceWithRole(role?: SpaceRole): ISpace {
+  // Only `membership.role` is consulted by the predicate; the rest is filler.
+  return {
+    membership: role ? ({ role } as any) : undefined,
+  } as ISpace;
+}
+
+describe("canCreatePage", () => {
+  it("is true for ADMIN and WRITER roles", () => {
+    expect(canCreatePage(spaceWithRole(SpaceRole.ADMIN))).toBe(true);
+    expect(canCreatePage(spaceWithRole(SpaceRole.WRITER))).toBe(true);
+  });
+
+  it("is false for the READER role", () => {
+    expect(canCreatePage(spaceWithRole(SpaceRole.READER))).toBe(false);
+  });
+
+  it("is false when membership / role is missing", () => {
+    expect(canCreatePage(spaceWithRole(undefined))).toBe(false);
+    expect(canCreatePage({} as ISpace)).toBe(false);
+  });
+
+  it("filters an empty space list down to nothing writable", () => {
+    const spaces: ISpace[] = [
+      spaceWithRole(SpaceRole.READER),
+      spaceWithRole(undefined),
+    ];
+    expect(spaces.filter(canCreatePage)).toHaveLength(0);
+  });
+});

apps/client/src/features/home/components/can-create-page.ts

@@ -0,0 +1,15 @@
+import { ISpace } from "@/features/space/types/space.types.ts";
+import { SpaceRole } from "@/lib/types.ts";
+
+// The /spaces list endpoint returns membership.role but NOT membership.permissions
+// (only /spaces/info includes CASL rules). Mirror the server space-ability mapping:
+// ADMIN and WRITER can manage pages, READER is read-only. So a space is writable
+// for the current user when their role is ADMIN or WRITER.
+//
+// Extracted from new-note-button.tsx into this pure sibling module so it can be
+// unit-tested without importing the component (whose dependency chain pulls in
+// main.tsx and renders the whole app at import time).
+export function canCreatePage(space: ISpace): boolean {
+  const role = space.membership?.role;
+  return role === SpaceRole.ADMIN || role === SpaceRole.WRITER;
+}

apps/client/src/features/home/components/created-by-me.tsx

@@ -82,6 +82,7 @@ export default function CreatedByMe({ spaceId }: Props) {
                     <Badge
                       color={getInitialsColor(page?.space.name)}
                       variant="light"
+                      tt="none"
                       component={Link}
                       to={getSpaceUrl(page?.space.slug)}
                       style={{ cursor: "pointer" }}

apps/client/src/features/home/components/favorites-pages.tsx

@@ -84,6 +84,7 @@ export default function FavoritesPages({ spaceId }: Props) {
                         <Badge
                           color={getInitialsColor(fav.space.name)}
                           variant="light"
+                          tt="none"
                           component={Link}
                           to={getSpaceUrl(fav.space.slug)}
                           style={{ cursor: "pointer" }}

apps/client/src/features/home/components/new-note-button.tsx

@@ -6,18 +6,9 @@ import { useGetSpacesQuery } from "@/features/space/queries/space-query.ts";
 import { useCreatePageMutation } from "@/features/page/queries/page-query.ts";
 import { buildPageUrl } from "@/features/page/page.utils.ts";
 import { ISpace } from "@/features/space/types/space.types.ts";
-import { SpaceRole } from "@/lib/types.ts";
 import { CustomAvatar } from "@/components/ui/custom-avatar.tsx";
 import { AvatarIconType } from "@/features/attachments/types/attachment.types.ts";
-
-// The /spaces list endpoint returns membership.role but NOT membership.permissions
-// (only /spaces/info includes CASL rules). Mirror the server space-ability mapping:
-// ADMIN and WRITER can manage pages, READER is read-only. So a space is writable
-// for the current user when their role is ADMIN or WRITER.
-function canCreatePage(space: ISpace): boolean {
-  const role = space.membership?.role;
-  return role === SpaceRole.ADMIN || role === SpaceRole.WRITER;
-}
+import { canCreatePage } from "./can-create-page.ts";
 
 // Prominent home-screen action to create a new note (page). Because the home
 // screen has no active space, the target space is resolved from the user's

apps/client/src/features/label/queries/label-query.ts

@@ -78,6 +78,8 @@ export function useAddLabelsMutation(pageId: string | undefined) {
 
       queryClient.invalidateQueries({ queryKey: ["label-pages"] });
       queryClient.invalidateQueries({ queryKey: ["label-info"] });
+      // Notify on success so the action gives visible feedback (issue #128)
+      notifications.show({ message: t("Label added") });
     },
     onError: (error: any) => {
       notifications.show({
@@ -110,6 +112,8 @@ export function useRemoveLabelMutation(pageId: string | undefined) {
       queryClient.invalidateQueries({ queryKey: ["workspace-labels"] });
       queryClient.invalidateQueries({ queryKey: ["label-pages"] });
       queryClient.invalidateQueries({ queryKey: ["label-info"] });
+      // Notify on success so the action gives visible feedback (issue #128)
+      notifications.show({ message: t("Label removed") });
     },
     onError: () => {
       notifications.show({

apps/client/src/features/page-history/components/history-diff.test.ts

@@ -0,0 +1,127 @@
+import { describe, it, expect } from "vitest";
+import { Schema } from "@tiptap/pm/model";
+import { computeHistoryDiff } from "./history-diff.ts";
+
+// Unit tests for `computeHistoryDiff` (history-diff.ts) — the pure core extracted
+// from history-editor.tsx. Given the editor schema plus old/new ProseMirror
+// document JSON it produces {decorationSet, added, deleted, total}: inline
+// decorations for text edits, whole-node decorations for added block nodes
+// (image/table), widget "ghosts" for deleted block nodes (callout), and an empty
+// diff for the first version or malformed JSON.
+//
+// We drive it with a hand-built ProseMirror schema rather than the real
+// `mainExtensions` because importing the editor extensions pulls in the whole app
+// (main.tsx) at module load. The schema below mirrors the relevant shape: a doc of
+// block content, an `image` block atom and a `table` block treated as whole-node
+// diffs, and a `callout` block treated as a deletable whole node.
+const schema = new Schema({
+  nodes: {
+    doc: { content: "block+" },
+    paragraph: {
+      group: "block",
+      content: "inline*",
+      toDOM: () => ["p", 0],
+    },
+    callout: {
+      group: "block",
+      content: "inline*",
+      toDOM: () => ["div", { class: "callout" }, 0],
+    },
+    image: {
+      group: "block",
+      atom: true,
+      attrs: { src: { default: "" } },
+      toDOM: (node) => ["img", { src: node.attrs.src }],
+    },
+    table: {
+      group: "block",
+      content: "paragraph+",
+      toDOM: () => ["table", ["tbody", 0]],
+    },
+    text: { group: "inline" },
+  },
+});
+
+const para = (text: string) => ({
+  type: "paragraph",
+  content: text ? [{ type: "text", text }] : [],
+});
+const docOf = (...blocks: any[]) => ({ type: "doc", content: blocks });
+
+describe("computeHistoryDiff", () => {
+  it("returns an empty diff (counts 0) when there is no previous version", () => {
+    const diff = computeHistoryDiff(schema, docOf(para("hello")), undefined);
+    expect(diff.added).toBe(0);
+    expect(diff.deleted).toBe(0);
+    expect(diff.total).toBe(0);
+    expect(diff.decorationSet.find()).toHaveLength(0);
+  });
+
+  it("returns an empty diff when content is missing", () => {
+    const diff = computeHistoryDiff(schema, undefined, docOf(para("x")));
+    expect(diff.total).toBe(0);
+  });
+
+  it("emits inline decorations and counts for a text edit", () => {
+    const prev = docOf(para("hello world"));
+    const next = docOf(para("hello brave world"));
+    const diff = computeHistoryDiff(schema, next, prev);
+
+    expect(diff.added).toBeGreaterThan(0);
+    const decos = diff.decorationSet.find();
+    expect(decos.length).toBeGreaterThan(0);
+    // An inline text addition is rendered with the inline-added class.
+    const classes = decos.map((d) => (d.spec as any)?.class ?? (d as any).type?.attrs?.class);
+    const hasInline = JSON.stringify(decos).includes("history-diff-added") ||
+      classes.some((c) => c === "history-diff-added");
+    expect(hasInline).toBe(true);
+  });
+
+  it("treats an added image as a whole-node addition", () => {
+    const prev = docOf(para("text"));
+    const next = docOf(para("text"), { type: "image", attrs: { src: "a.png" } });
+    const diff = computeHistoryDiff(schema, next, prev);
+    expect(diff.added).toBeGreaterThan(0);
+    expect(JSON.stringify(diff.decorationSet.find())).toContain(
+      "history-diff-node-added",
+    );
+  });
+
+  it("treats an added table as a whole-node addition", () => {
+    const prev = docOf(para("text"));
+    const next = docOf(para("text"), {
+      type: "table",
+      content: [para("cell")],
+    });
+    const diff = computeHistoryDiff(schema, next, prev);
+    expect(diff.added).toBeGreaterThan(0);
+    expect(JSON.stringify(diff.decorationSet.find())).toContain(
+      "history-diff-node-added",
+    );
+  });
+
+  it("renders a widget ghost for a deleted callout", () => {
+    const prev = docOf(para("text"), {
+      type: "callout",
+      content: [{ type: "text", text: "warning" }],
+    });
+    const next = docOf(para("text"));
+    const diff = computeHistoryDiff(schema, next, prev);
+    expect(diff.deleted).toBeGreaterThan(0);
+    // The deleted whole node produces a widget decoration (toDOM callback).
+    const decos = diff.decorationSet.find();
+    expect(decos.some((d) => (d as any).type?.toDOM || (d as any).type?.widget)).toBe(
+      true,
+    );
+  });
+
+  it("falls back to an empty diff (no throw) on malformed version JSON", () => {
+    const malformed = { type: "doc", content: [{ type: "nonexistent-node" }] };
+    expect(() =>
+      computeHistoryDiff(schema, malformed, docOf(para("x"))),
+    ).not.toThrow();
+    const diff = computeHistoryDiff(schema, malformed, docOf(para("x")));
+    expect(diff.total).toBe(0);
+    expect(diff.decorationSet.find()).toHaveLength(0);
+  });
+});

apps/client/src/features/page-history/components/history-diff.ts

@@ -0,0 +1,168 @@
+import { Decoration, DecorationSet } from "@tiptap/pm/view";
+import { DOMSerializer, Node, Schema } from "@tiptap/pm/model";
+import { ChangeSet, simplifyChanges } from "@tiptap/pm/changeset";
+import { recreateTransform } from "@docmost/editor-ext";
+
+export interface HistoryDiff {
+  decorationSet: DecorationSet;
+  added: number;
+  deleted: number;
+  total: number;
+}
+
+// Block-level nodes that are diffed as a whole ("this image/table/callout was
+// added/removed") instead of by inline character ranges.
+const SPECIAL_NODE_TYPES = new Set([
+  "image",
+  "attachment",
+  "video",
+  "excalidraw",
+  "drawio",
+  "mermaid",
+  "mathBlock",
+  "mathInline",
+  "table",
+  "details",
+  "callout",
+]);
+
+// Pure core of the history diff (extracted from history-editor.tsx, behaviour
+// preserving): given the editor schema and two ProseMirror document JSONs, return
+// the decoration set plus added/deleted/total counts. The widget decorations carry
+// lazy DOM-building callbacks (only run by ProseMirror at render time), so this
+// function itself does no DOM work and needs no live editor instance.
+//
+// `previousContent` undefined -> first version, so there is nothing to diff
+// (empty decorations, all counts 0). Malformed JSON that throws while building
+// nodes falls back to the same empty diff so the caller can still render plain
+// content without crashing.
+export function computeHistoryDiff(
+  schema: Schema,
+  content: any,
+  previousContent?: any,
+): HistoryDiff {
+  const empty: HistoryDiff = {
+    decorationSet: DecorationSet.empty,
+    added: 0,
+    deleted: 0,
+    total: 0,
+  };
+
+  if (!content || !previousContent) {
+    return empty;
+  }
+
+  try {
+    const oldContent = Node.fromJSON(schema, previousContent);
+    const newContent = Node.fromJSON(schema, content);
+
+    const tr = recreateTransform(oldContent, newContent, {
+      complexSteps: false,
+      wordDiffs: true,
+      simplifyDiff: true,
+    });
+
+    const changeSet = ChangeSet.create(oldContent).addSteps(
+      tr.doc,
+      tr.mapping.maps,
+      [],
+    );
+    const changes = simplifyChanges(changeSet.changes, newContent);
+
+    const decorations: Decoration[] = [];
+    let addedCount = 0;
+    let deletedCount = 0;
+    let changeIndex = 0;
+
+    for (const change of changes) {
+      if (change.toB > change.fromB) {
+        changeIndex++;
+        const currentIndex = changeIndex;
+        let foundSpecialNode: { node: Node; pos: number } | null = null;
+        newContent.nodesBetween(change.fromB, change.toB, (node, pos) => {
+          if (SPECIAL_NODE_TYPES.has(node.type.name)) {
+            const nodeEnd = pos + node.nodeSize;
+            if (change.fromB <= pos && change.toB >= nodeEnd) {
+              foundSpecialNode = { node, pos };
+              return false;
+            }
+          }
+        });
+
+        if (foundSpecialNode) {
+          const special = foundSpecialNode as { node: Node; pos: number };
+          const nodeEnd = special.pos + special.node.nodeSize;
+          decorations.push(
+            Decoration.node(special.pos, nodeEnd, {
+              class: "history-diff-node-added",
+              "data-diff-index": String(currentIndex),
+            }),
+          );
+        } else {
+          decorations.push(
+            Decoration.inline(change.fromB, change.toB, {
+              class: "history-diff-added",
+              "data-diff-index": String(currentIndex),
+            }),
+          );
+        }
+        addedCount += 1;
+      }
+      if (change.toA > change.fromA) {
+        changeIndex++;
+        const currentIndex = changeIndex;
+        let foundDeletedNode: { node: Node; pos: number } | null = null;
+        oldContent.nodesBetween(change.fromA, change.toA, (node, pos) => {
+          if (SPECIAL_NODE_TYPES.has(node.type.name)) {
+            const nodeEnd = pos + node.nodeSize;
+            if (change.fromA <= pos && change.toA >= nodeEnd) {
+              foundDeletedNode = { node, pos };
+              return false;
+            }
+          }
+        });
+
+        if (foundDeletedNode) {
+          const deletedNode = foundDeletedNode as { node: Node; pos: number };
+          decorations.push(
+            Decoration.widget(change.fromB, () => {
+              const wrapper = document.createElement("div");
+              wrapper.className = "history-diff-node-deleted";
+              wrapper.setAttribute("data-diff-index", String(currentIndex));
+              const serializer = DOMSerializer.fromSchema(schema);
+              const dom = serializer.serializeNode(deletedNode.node);
+              wrapper.appendChild(dom);
+              return wrapper;
+            }),
+          );
+        } else {
+          const deletedText = oldContent.textBetween(
+            change.fromA,
+            change.toA,
+            "",
+          );
+          if (deletedText) {
+            decorations.push(
+              Decoration.widget(change.fromB, () => {
+                const span = document.createElement("span");
+                span.className = "history-diff-deleted";
+                span.setAttribute("data-diff-index", String(currentIndex));
+                span.textContent = deletedText;
+                return span;
+              }),
+            );
+          }
+        }
+        deletedCount += 1;
+      }
+    }
+
+    const decorationSet = DecorationSet.create(newContent, decorations);
+    const total = addedCount + deletedCount;
+    return { decorationSet, added: addedCount, deleted: deletedCount, total };
+  } catch (e) {
+    // Malformed version JSON: fall back to a plain (no-diff) render.
+    console.error("History diff failed:", e);
+    return empty;
+  }
+}

apps/client/src/features/page-history/components/history-editor.tsx

@@ -3,11 +3,9 @@ import { useEffect } from "react";
 import { EditorContent, useEditor } from "@tiptap/react";
 import { mainExtensions } from "@/features/editor/extensions/extensions";
 import { Title } from "@mantine/core";
-import { Decoration, DecorationSet } from "@tiptap/pm/view";
+import { DecorationSet } from "@tiptap/pm/view";
 import historyClasses from "./css/history.module.css";
-import { recreateTransform } from "@docmost/editor-ext";
-import { DOMSerializer, Node } from "@tiptap/pm/model";
-import { ChangeSet, simplifyChanges } from "@tiptap/pm/changeset";
+import { computeHistoryDiff } from "./history-diff.ts";
 import { useAtom } from "jotai";
 import {
   diffCountsAtom,
@@ -36,142 +34,18 @@ export function HistoryEditor({
   useEffect(() => {
     if (!editor || !content) return;
 
-    let decorationSet = DecorationSet.empty;
-    let addedCount = 0;
-    let deletedCount = 0;
+    // Pure diff computation lives in history-diff.ts; the component keeps the
+    // editor side-effects (rendering the new content + wiring decorations).
+    const { decorationSet, added, deleted, total } = computeHistoryDiff(
+      editor.schema,
+      content,
+      previousContent,
+    );
 
-    if (previousContent) {
-      try {
-        const schema = editor.schema;
-        const oldContent = Node.fromJSON(schema, previousContent);
-        const newContent = Node.fromJSON(schema, content);
+    editor.commands.setContent(content);
 
-        const tr = recreateTransform(oldContent, newContent, {
-          complexSteps: false,
-          wordDiffs: true,
-          simplifyDiff: true,
-        });
-
-        const changeSet = ChangeSet.create(oldContent).addSteps(
-          tr.doc,
-          tr.mapping.maps,
-          [],
-        );
-        const changes = simplifyChanges(changeSet.changes, newContent);
-
-        editor.commands.setContent(content);
-
-        const specialNodeTypes = new Set([
-          "image",
-          "attachment",
-          "video",
-          "excalidraw",
-          "drawio",
-          "mermaid",
-          "mathBlock",
-          "mathInline",
-          "table",
-          "details",
-          "callout",
-        ]);
-
-        const decorations: Decoration[] = [];
-        let changeIndex = 0;
-
-        for (const change of changes) {
-          if (change.toB > change.fromB) {
-            changeIndex++;
-            const currentIndex = changeIndex;
-            let foundSpecialNode: { node: Node; pos: number } | null = null;
-            newContent.nodesBetween(change.fromB, change.toB, (node, pos) => {
-              if (specialNodeTypes.has(node.type.name)) {
-                const nodeEnd = pos + node.nodeSize;
-                if (change.fromB <= pos && change.toB >= nodeEnd) {
-                  foundSpecialNode = { node, pos };
-                  return false;
-                }
-              }
-            });
-
-            if (foundSpecialNode) {
-              const nodeEnd =
-                foundSpecialNode.pos + foundSpecialNode.node.nodeSize;
-              decorations.push(
-                Decoration.node(foundSpecialNode.pos, nodeEnd, {
-                  class: "history-diff-node-added",
-                  "data-diff-index": String(currentIndex),
-                }),
-              );
-            } else {
-              decorations.push(
-                Decoration.inline(change.fromB, change.toB, {
-                  class: "history-diff-added",
-                  "data-diff-index": String(currentIndex),
-                }),
-              );
-            }
-            addedCount += 1;
-          }
-          if (change.toA > change.fromA) {
-            changeIndex++;
-            const currentIndex = changeIndex;
-            let foundDeletedNode: { node: Node; pos: number } | null = null;
-            oldContent.nodesBetween(change.fromA, change.toA, (node, pos) => {
-              if (specialNodeTypes.has(node.type.name)) {
-                const nodeEnd = pos + node.nodeSize;
-                if (change.fromA <= pos && change.toA >= nodeEnd) {
-                  foundDeletedNode = { node, pos };
-                  return false;
-                }
-              }
-            });
-
-            if (foundDeletedNode) {
-              decorations.push(
-                Decoration.widget(change.fromB, () => {
-                  const wrapper = document.createElement("div");
-                  wrapper.className = "history-diff-node-deleted";
-                  wrapper.setAttribute("data-diff-index", String(currentIndex));
-                  const serializer = DOMSerializer.fromSchema(schema);
-                  const dom = serializer.serializeNode(foundDeletedNode!.node);
-                  wrapper.appendChild(dom);
-                  return wrapper;
-                }),
-              );
-            } else {
-              const deletedText = oldContent.textBetween(
-                change.fromA,
-                change.toA,
-                "",
-              );
-              if (deletedText) {
-                decorations.push(
-                  Decoration.widget(change.fromB, () => {
-                    const span = document.createElement("span");
-                    span.className = "history-diff-deleted";
-                    span.setAttribute("data-diff-index", String(currentIndex));
-                    span.textContent = deletedText;
-                    return span;
-                  }),
-                );
-              }
-            }
-            deletedCount += 1;
-          }
-        }
-
-        decorationSet = DecorationSet.create(newContent, decorations);
-      } catch (e) {
-        console.error("History diff failed:", e);
-        editor.commands.setContent(content);
-      }
-    } else {
-      editor.commands.setContent(content);
-    }
-
-    const total = addedCount + deletedCount;
     // @ts-ignore
-    setDiffCounts({ added: addedCount, deleted: deletedCount, total });
+    setDiffCounts({ added, deleted, total });
 
     editor.setOptions({
       editorProps: {

apps/client/src/features/page-history/components/history-item.tsx

@@ -1,18 +1,12 @@
-import { Text, Group, UnstyledButton, Avatar, Tooltip, Badge } from "@mantine/core";
-import { IconSparkles } from "@tabler/icons-react";
+import { Text, Group, UnstyledButton, Avatar, Tooltip } from "@mantine/core";
 import { CustomAvatar } from "@/components/ui/custom-avatar.tsx";
+import { AiAgentBadge } from "@/components/ui/ai-agent-badge.tsx";
 import { formattedDate } from "@/lib/time";
 import classes from "./css/history.module.css";
 import clsx from "clsx";
 import { IPageHistory } from "@/features/page-history/types/page.types";
 import { memo, useCallback } from "react";
-import { useTranslation } from "react-i18next";
 import { useSetAtom } from "jotai";
-import {
-  activeAiChatIdAtom,
-  aiChatWindowOpenAtom,
-  aiChatDraftAtom,
-} from "@/features/ai-chat/atoms/ai-chat-atom.ts";
 import { historyAtoms } from "@/features/page-history/atoms/history-atoms.ts";
 
 const MAX_VISIBLE_AVATARS = 5;
@@ -26,87 +20,6 @@ interface HistoryItemProps {
   isActive: boolean;
 }
 
-/**
- * Badge marking a version written by the AI agent (provenance C3 / §7.4). It is
- * ADDITIVE — shown next to the human author, never replacing them. When the
- * version carries an `aiChatId`, clicking the badge deep-links into that chat:
- * it sets the active-chat atom, opens the floating AI-chat window, and closes
- * the history modal. The click is contained (stopPropagation) so it does not
- * also trigger the row's version-select.
- */
-function AiAgentBadge({
-  authorName,
-  aiChatId,
-}: {
-  authorName?: string;
-  aiChatId?: string | null;
-}) {
-  const { t } = useTranslation();
-  const setAiChatWindowOpen = useSetAtom(aiChatWindowOpenAtom);
-  const setActiveChatId = useSetAtom(activeAiChatIdAtom);
-  const setDraft = useSetAtom(aiChatDraftAtom);
-  const setHistoryModalOpen = useSetAtom(historyAtoms);
-
-  const tooltip = t("Edited by AI agent on behalf of {{name}}", {
-    name: authorName ?? "",
-  });
-
-  const openChat = useCallback(
-    (event: React.SyntheticEvent) => {
-      event.stopPropagation();
-      if (!aiChatId) return;
-      setActiveChatId(aiChatId);
-      // Switching to another chat must start with a clean composer — clear any
-      // unsent draft so it does not leak from the previously open chat.
-      setDraft("");
-      setAiChatWindowOpen(true);
-      setHistoryModalOpen(false);
-    },
-    [
-      aiChatId,
-      setActiveChatId,
-      setDraft,
-      setAiChatWindowOpen,
-      setHistoryModalOpen,
-    ],
-  );
-
-  const badge = (
-    <Badge
-      size="sm"
-      variant="light"
-      color="violet"
-      radius="sm"
-      leftSection={<IconSparkles size={12} stroke={2} />}
-      style={aiChatId ? { cursor: "pointer" } : undefined}
-      {...(aiChatId
-        ? {
-            // Keep the default Badge root element (not a <button>) to avoid an
-            // invalid <button>-in-<button> nesting inside the history row's
-            // UnstyledButton; expose it as an accessible button via role/keyboard.
-            role: "button",
-            tabIndex: 0,
-            onClick: openChat,
-            onKeyDown: (event: React.KeyboardEvent) => {
-              if (event.key === "Enter" || event.key === " ") {
-                event.preventDefault();
-                openChat(event);
-              }
-            },
-          }
-        : {})}
-    >
-      {t("AI-agent")}
-    </Badge>
-  );
-
-  return (
-    <Tooltip label={tooltip} withArrow>
-      {badge}
-    </Tooltip>
-  );
-}
-
 const HistoryItem = memo(function HistoryItem({
   historyItem,
   index,
@@ -115,6 +28,8 @@ const HistoryItem = memo(function HistoryItem({
   onHoverEnd,
   isActive,
 }: HistoryItemProps) {
+  const setHistoryModalOpen = useSetAtom(historyAtoms);
+
   const handleClick = useCallback(() => {
     onSelect(historyItem.id, index);
   }, [onSelect, historyItem.id, index]);
@@ -188,6 +103,9 @@ const HistoryItem = memo(function HistoryItem({
           <AiAgentBadge
             authorName={historyItem.lastUpdatedBy?.name}
             aiChatId={historyItem.lastUpdatedAiChatId}
+            // The history row owns the modal: close it when the badge deep-links
+            // into the chat (the badge no longer reaches into page-history).
+            onActivate={() => setHistoryModalOpen(false)}
           />
         )}
       </Group>

apps/client/src/features/page/components/header/page-header-menu.tsx

@@ -1,4 +1,4 @@
-import { ActionIcon, Group, Menu, Text, ThemeIcon, Tooltip } from "@mantine/core";
+import { ActionIcon, Button, Group, Menu, Text, ThemeIcon, Tooltip } from "@mantine/core";
 import {
   IconArrowRight,
   IconArrowsHorizontal,
@@ -10,7 +10,6 @@ import {
   IconLink,
   IconList,
   IconMarkdown,
-  IconMessage,
   IconPrinter,
   IconStar,
   IconStarFilled,
@@ -102,18 +101,21 @@ export default function PageHeaderMenu({ readOnly }: PageHeaderMenuProps) {
 
       {!readOnly && <PageEditModeToggle size="xs" />}
 
-      {!workspaceSharingDisabled && <ShareModal readOnly={readOnly ?? false} />}
+      {/* Hide the Share entry point for readers; the toggle inside is inert
+          without edit permission, so gate it like other edit-only actions
+          (issue #133) */}
+      {!readOnly && !workspaceSharingDisabled && (
+        <ShareModal readOnly={false} />
+      )}
 
-      <Tooltip label={t("Comments")} openDelay={250} withArrow>
-        <ActionIcon
-          variant="subtle"
-          color="dark"
-          aria-label={t("Comments")}
-          {...commentsTriggerProps}
-        >
-          <IconMessage size={20} stroke={2} />
-        </ActionIcon>
-      </Tooltip>
+      <Button
+        variant="subtle"
+        color="dark"
+        size="compact-sm"
+        {...commentsTriggerProps}
+      >
+        {t("Comments")}
+      </Button>
 
       <Tooltip label={t("Table of contents")} openDelay={250} withArrow>
         <ActionIcon
@@ -286,7 +288,7 @@ function PageActionMenu({ readOnly }: PageActionMenuProps) {
               leftSection={<IconArrowRight size={16} />}
               onClick={openMovePageModal}
             >
-              {t("Move")}
+              {t("Move to space")}
             </Menu.Item>
           )}
 

apps/client/src/features/page/queries/page-query.ts

@@ -21,6 +21,7 @@ import {
   getAllSidebarPages,
   getDeletedPages,
   restorePage,
+  getSpaceTree,
 } from "@/features/page/services/page-service";
 import {
   IMovePage,
@@ -273,7 +274,10 @@ export function useRestorePageMutation() {
       queryClient.setQueryData<IPage>(["pages", restoredPage.slugId], merge);
     },
     onError: (error) => {
-      notifications.show({ message: t("Failed to restore page"), color: "red" });
+      notifications.show({
+        message: t("Failed to restore page"),
+        color: "red",
+      });
     },
   });
 }
@@ -284,10 +288,10 @@ export function useGetSidebarPagesQuery(
   return useInfiniteQuery({
     queryKey: ["sidebar-pages", data],
     enabled: !!data?.pageId || !!data?.spaceId,
-    queryFn: ({ pageParam }) => getSidebarPages({ ...data, cursor: pageParam, limit: 100 }),
+    queryFn: ({ pageParam }) =>
+      getSidebarPages({ ...data, cursor: pageParam, limit: 100 }),
     initialPageParam: undefined,
-    getNextPageParam: (lastPage) =>
-      lastPage.meta?.nextCursor ?? undefined,
+    getNextPageParam: (lastPage) => lastPage.meta?.nextCursor ?? undefined,
   });
 }
 
@@ -295,11 +299,23 @@ export function useGetRootSidebarPagesQuery(data: SidebarPagesParams) {
   return useInfiniteQuery({
     queryKey: ["root-sidebar-pages", data.spaceId],
     queryFn: async ({ pageParam }) => {
-      return getSidebarPages({ spaceId: data.spaceId, cursor: pageParam, limit: 100 });
+      return getSidebarPages({
+        spaceId: data.spaceId,
+        cursor: pageParam,
+        limit: 100,
+      });
     },
     initialPageParam: undefined,
-    getNextPageParam: (lastPage) =>
-      lastPage.meta?.nextCursor ?? undefined,
+    getNextPageParam: (lastPage) => lastPage.meta?.nextCursor ?? undefined,
+  });
+}
+
+export function useGetPageTreeQuery(pageId: string) {
+  return useQuery({
+    queryKey: ["page-tree", pageId],
+    queryFn: () => getSpaceTree({ pageId }),
+    enabled: !!pageId,
+    staleTime: 30 * 1000,
   });
 }
 
@@ -313,12 +329,17 @@ export function usePageBreadcrumbsQuery(
   });
 }
 
-export async function fetchAllAncestorChildren(params: SidebarPagesParams) {
+export async function fetchAllAncestorChildren(
+  params: SidebarPagesParams,
+  // `fresh: true` forces a server refetch (staleTime 0) — used by the reconnect
+  // refresh (#159 #8), which must NOT receive the 30-min-cached children.
+  opts?: { fresh?: boolean },
+) {
   // not using a hook here, so we can call it inside a useEffect hook
   const response = await queryClient.fetchQuery({
     queryKey: ["sidebar-pages", params],
     queryFn: () => getAllSidebarPages(params),
-    staleTime: 30 * 60 * 1000,
+    staleTime: opts?.fresh ? 0 : 30 * 60 * 1000,
   });
 
   const allItems = response.pages.flatMap((page) => page.items);
@@ -337,11 +358,15 @@ export function useRecentChangesQuery(spaceId?: string) {
   });
 }
 
-export function useCreatedByQuery(params?: { userId?: string; spaceId?: string }) {
+export function useCreatedByQuery(params?: {
+  userId?: string;
+  spaceId?: string;
+}) {
   const { userId, spaceId } = params ?? {};
   return useInfiniteQuery({
     queryKey: ["pages-created-by-user", { userId, spaceId }],
-    queryFn: ({ pageParam }) => getCreatedByPages({ userId, spaceId, cursor: pageParam, limit: 15 }),
+    queryFn: ({ pageParam }) =>
+      getCreatedByPages({ userId, spaceId, cursor: pageParam, limit: 15 }),
     initialPageParam: undefined as string | undefined,
     getNextPageParam: (lastPage) =>
       lastPage.meta.hasNextPage ? lastPage.meta.nextCursor : undefined,
@@ -363,7 +388,18 @@ export function useDeletedPagesQuery(
   });
 }
 
+/**
+ * Invalidate every cached page-subtree (the recursive `subpages` node, issue
+ * #150). Called from each tree-structure cache helper below so a create / move /
+ * rename / delete (local OR websocket-echoed) refreshes any open recursive tree.
+ * Keyed loosely (`["page-tree"]` prefix) so all subtrees are caught.
+ */
+function invalidatePageTree() {
+  queryClient.invalidateQueries({ queryKey: ["page-tree"] });
+}
+
 export function invalidateOnCreatePage(data: Partial<IPage>) {
+  invalidatePageTree();
   const newPage: Partial<IPage> = {
     creatorId: data.creatorId,
     hasChildren: data.hasChildren,
@@ -478,6 +514,7 @@ export function invalidateOnUpdatePage(
   title: string,
   icon: string,
 ) {
+  invalidatePageTree();
   let queryKey: QueryKey = null;
   if (parentPageId === null) {
     queryKey = ["root-sidebar-pages", spaceId];
@@ -516,6 +553,7 @@ export function updateCacheOnMovePage(
   newParentId: string | null,
   pageData: Partial<IPage>,
 ) {
+  invalidatePageTree();
   // Remove page from old parent's cache
   const oldQueryKey =
     oldParentId === null
@@ -633,6 +671,7 @@ export function updateCacheOnMovePage(
 }
 
 export function invalidateOnDeletePage(pageId: string) {
+  invalidatePageTree();
   //update all sidebar pages
   const allSideBarMatches = queryClient.getQueriesData({
     predicate: (query) =>

apps/client/src/features/page/services/page-service.ts

@@ -93,7 +93,7 @@ export async function getAllSidebarPages(
 }
 
 export async function getSpaceTree(params: {
-  spaceId: string;
+  spaceId?: string;
   pageId?: string;
 }): Promise<IPage[]> {
   const req = await api.post<{ items: IPage[] }>("/pages/tree", params);

apps/client/src/features/page/tree/components/space-tree-node-menu.tsx

@@ -148,7 +148,7 @@ export function NodeMenu({ node, canEdit }: NodeMenuProps) {
             variant="subtle"
             color="gray"
             className={classes.actionIcon}
-            aria-label={t("Page menu for {{name}}", { name: node.name || t("untitled") })}
+            aria-label={t("Page menu for {{name}}", { name: node.name || t("Untitled") })}
             tabIndex={-1}
             onClick={(e) => {
               e.preventDefault();
@@ -199,7 +199,7 @@ export function NodeMenu({ node, canEdit }: NodeMenuProps) {
               openExportModal();
             }}
           >
-            {t("Export page")}
+            {t("Export")}
           </Menu.Item>
 
           {canEdit && (
@@ -223,7 +223,7 @@ export function NodeMenu({ node, canEdit }: NodeMenuProps) {
                   openMovePageModal();
                 }}
               >
-                {t("Move")}
+                {t("Move to space")}
               </Menu.Item>
 
               <Menu.Item

apps/client/src/features/page/tree/components/space-tree-row.tsx

@@ -170,7 +170,7 @@ export function SpaceTreeRow({
         />
       </div>
 
-      <span className={classes.text}>{node.name || t("untitled")}</span>
+      <span className={classes.text}>{node.name || t("Untitled")}</span>
 
       {node.isTemplate === true && (
         <Tooltip label={t("Template")} withArrow>
@@ -297,7 +297,7 @@ function CreateNode({
       variant="subtle"
       color="gray"
       className={classes.actionIcon}
-      aria-label={t("Create subpage of {{name}}", { name: node.name || t("untitled") })}
+      aria-label={t("Create subpage of {{name}}", { name: node.name || t("Untitled") })}
       tabIndex={-1}
       onClick={(e) => {
         e.preventDefault();

apps/client/src/features/page/tree/components/space-tree.tsx

@@ -29,9 +29,11 @@ import {
   collectBranchIds,
   openBranches,
   closeIds,
+  loadedOpenBranchIds,
 } from "@/features/page/tree/utils/utils.ts";
 import { SpaceTreeNode } from "@/features/page/tree/types.ts";
 import { treeModel } from "@/features/page/tree/model/tree-model";
+import { socketAtom } from "@/features/websocket/atoms/socket-atom.ts";
 import {
   getPageBreadcrumbs,
   getSpaceTree,
@@ -39,11 +41,7 @@ import {
 import { IPage } from "@/features/page/types/page.types.ts";
 import { extractPageSlugId } from "@/lib";
 import { isCompactPageTreeEnabled } from "@/lib/config.ts";
-import {
-  DocTree,
-  ROW_HEIGHT_COMPACT,
-  ROW_HEIGHT_STANDARD,
-} from "./doc-tree";
+import { DocTree, ROW_HEIGHT_COMPACT, ROW_HEIGHT_STANDARD } from "./doc-tree";
 import { SpaceTreeRow } from "./space-tree-row";
 
 interface SpaceTreeProps {
@@ -193,6 +191,54 @@ const SpaceTree = forwardRef<SpaceTreeApi, SpaceTreeProps>(function SpaceTree(
     [openTreeNodes],
   );
 
+  // Latest tree + open-state for the reconnect handler (its closure would
+  // otherwise read stale snapshots).
+  const [socket] = useAtom(socketAtom);
+  const dataRef = useRef(data);
+  dataRef.current = data;
+  const openIdsRef = useRef(openIds);
+  openIdsRef.current = openIds;
+
+  // Reconnect refresh (#159 #8): on a socket reconnect, re-fetch and reconcile
+  // the children of every currently-open, already-loaded branch of THIS space,
+  // so a move/rename/delete that happened INSIDE a loaded branch while events
+  // were missed (laptop sleep / wifi gap) is reflected instead of left stale.
+  // The ROOT level is reconciled separately by the root-query refetch +
+  // mergeRootTrees; an UNLOADED branch is skipped (lazy-load fetches it fresh on
+  // expand). No first-connect guard is needed: space-tree usually mounts AFTER
+  // the initial connect, so every `connect` it sees is a reconnect; the rare
+  // initial-connect case has an empty tree, so the refresh is a harmless no-op.
+  useEffect(() => {
+    if (!socket) return;
+    const onConnect = async () => {
+      const effectSpaceId = spaceIdRef.current;
+      const branchIds = loadedOpenBranchIds(
+        dataRef.current.filter((n) => n?.spaceId === effectSpaceId),
+        openIdsRef.current,
+      );
+      if (branchIds.length === 0) return;
+      for (const id of branchIds) {
+        try {
+          // `fresh: true` bypasses the 30-min sidebar-pages cache so the
+          // reconcile sees the server's CURRENT children (handler-order
+          // independent — no reliance on the global reconnect invalidation).
+          const fresh = await fetchAllAncestorChildren(
+            { pageId: id, spaceId: effectSpaceId },
+            { fresh: true },
+          );
+          if (spaceIdRef.current !== effectSpaceId) return; // space switched
+          setData((prev) => treeModel.reconcileChildren(prev, id, fresh));
+        } catch (err) {
+          console.error("[tree] reconnect branch refresh failed", err);
+        }
+      }
+    };
+    socket.on("connect", onConnect);
+    return () => {
+      socket.off("connect", onConnect);
+    };
+  }, [socket, setData]);
+
   const handleToggle = useCallback(
     async (id: string, isOpen: boolean) => {
       setOpenTreeNodes((prev) => ({ ...prev, [id]: isOpen }));
@@ -245,8 +291,7 @@ const SpaceTree = forwardRef<SpaceTreeApi, SpaceTreeProps>(function SpaceTree(
       notifications.show({
         color: "red",
         message: t("Couldn't expand the tree: {{reason}}", {
-          reason:
-            err?.response?.data?.message ?? err?.message ?? String(err),
+          reason: err?.response?.data?.message ?? err?.message ?? String(err),
         }),
       });
     } finally {
@@ -262,11 +307,11 @@ const SpaceTree = forwardRef<SpaceTreeApi, SpaceTreeProps>(function SpaceTree(
     setOpenTreeNodes((prev) => closeIds(prev, ids));
   }, [filteredData, setOpenTreeNodes]);
 
-  useImperativeHandle(
-    ref,
-    () => ({ expandAll, collapseAll, isExpanding }),
-    [expandAll, collapseAll, isExpanding],
-  );
+  useImperativeHandle(ref, () => ({ expandAll, collapseAll, isExpanding }), [
+    expandAll,
+    collapseAll,
+    isExpanding,
+  ]);
 
   // Stable callbacks for DocTree. Without these, every parent render recreates
   // the props and tears down every row's draggable/dropTarget subscription,
@@ -282,7 +327,7 @@ const SpaceTree = forwardRef<SpaceTreeApi, SpaceTreeProps>(function SpaceTree(
     [],
   );
   const getDragLabel = useCallback(
-    (n: SpaceTreeNode) => n.name || t("untitled"),
+    (n: SpaceTreeNode) => n.name || t("Untitled"),
     [t],
   );
 

apps/client/src/features/page/tree/model/tree-model.ts

@@ -1,4 +1,4 @@
-import type { TreeNode, SiblingsInfo } from './tree-model.types';
+import type { TreeNode, SiblingsInfo } from "./tree-model.types";
 
 function findInternal<T extends object>(
   nodes: TreeNode<T>[],
@@ -19,7 +19,10 @@ export const treeModel = {
     return findInternal(tree, id)?.node ?? null;
   },
 
-  path<T extends object>(tree: TreeNode<T>[], id: string): TreeNode<T>[] | null {
+  path<T extends object>(
+    tree: TreeNode<T>[],
+    id: string,
+  ): TreeNode<T>[] | null {
     const found = findInternal(tree, id);
     if (!found) return null;
     return [...found.parents, found.node];
@@ -123,6 +126,23 @@ export const treeModel = {
       return treeModel.insert(tree, null, node, index(tree));
     }
     const parent = treeModel.find(tree, parentId);
+    // The parent is in the tree but its children have NOT been lazy-loaded yet
+    // (`children === undefined`, distinct from a loaded-but-empty `[]`). Inserting
+    // here would MATERIALIZE a misleading partial child list (`[node]`) that
+    // defeats the lazy-load gate — which fetches only when children are
+    // absent/empty — so the parent's OTHER real children would never load and the
+    // moved/added node would be the only one shown (a silent data loss, #159 #1).
+    // Instead, leave the children unloaded and just flag `hasChildren` so the
+    // chevron appears; expanding fetches the FULL set (including this node).
+    if (parent && parent.children === undefined) {
+      return treeModel.update(
+        tree,
+        parentId,
+        // hasChildren is not part of the generic T constraint; tree nodes carry
+        // it. Cast narrowly so this stays a single, well-understood exception.
+        { hasChildren: true } as unknown as Omit<Partial<T>, "id" | "children">,
+      );
+    }
     const kids = (parent?.children as TreeNode<T>[] | undefined) ?? [];
     return treeModel.insert(tree, parentId, node, index(kids));
   },
@@ -203,6 +223,48 @@ export const treeModel = {
     return touched ? out : tree;
   },
 
+  // Replace a parent's DIRECT children with the authoritative `fresh` set while
+  // PRESERVING each surviving child's already-loaded grandchildren (deeper
+  // expansion). Unlike `appendChildren` (add-only), this DROPS children that are
+  // no longer present and reorders to `fresh` — so a move/delete/rename that
+  // happened inside a loaded branch while events were missed (a socket reconnect
+  // gap) is reflected, not left stale (#159 #8). Only used to reconcile an
+  // already-loaded branch against a fresh fetch; a parent with no loaded children
+  // (`children === undefined`) is left untouched (lazy-load handles it).
+  reconcileChildren<T extends object>(
+    tree: TreeNode<T>[],
+    parentId: string,
+    fresh: TreeNode<T>[],
+  ): TreeNode<T>[] {
+    let touched = false;
+    const walk = (nodes: TreeNode<T>[]): TreeNode<T>[] =>
+      nodes.map((n) => {
+        if (n.id === parentId) {
+          // Only reconcile a branch whose children were actually loaded; an
+          // unloaded parent stays unloaded (lazy-load fetches it fresh later).
+          if (n.children === undefined) return n;
+          const prevById = new Map(n.children.map((c) => [c.id, c]));
+          const merged = fresh.map((f) => {
+            const prev = prevById.get(f.id);
+            // Preserve the surviving child's previously loaded grandchildren so
+            // deeper expansion is not collapsed by the reconcile.
+            return prev?.children !== undefined
+              ? { ...f, children: prev.children }
+              : f;
+          });
+          touched = true;
+          return { ...n, children: merged };
+        }
+        if (n.children) {
+          const next = walk(n.children);
+          if (next !== n.children) return { ...n, children: next };
+        }
+        return n;
+      });
+    const out = walk(tree);
+    return touched ? out : tree;
+  },
+
   place<T extends object>(
     tree: TreeNode<T>[],
     sourceId: string,
@@ -242,9 +304,10 @@ export const treeModel = {
   move<T extends object>(
     tree: TreeNode<T>[],
     sourceId: string,
-    op: import('./tree-model.types').DropOp,
-  ): { tree: TreeNode<T>[]; result: import('./tree-model.types').DropResult } {
-    if (sourceId === op.targetId) return { tree, result: { parentId: null, index: 0 } };
+    op: import("./tree-model.types").DropOp,
+  ): { tree: TreeNode<T>[]; result: import("./tree-model.types").DropResult } {
+    if (sourceId === op.targetId)
+      return { tree, result: { parentId: null, index: 0 } };
     if (!treeModel.find(tree, sourceId) || !treeModel.find(tree, op.targetId)) {
       return { tree, result: { parentId: null, index: 0 } };
     }
@@ -255,7 +318,7 @@ export const treeModel = {
     let parentId: string | null;
     let index: number;
 
-    if (op.kind === 'make-child') {
+    if (op.kind === "make-child") {
       parentId = op.targetId;
       const target = treeModel.find(tree, op.targetId)!;
       index = target.children?.length ?? 0;
@@ -264,9 +327,8 @@ export const treeModel = {
       parentId = info.parentId;
       const sourceInfo = treeModel.siblingsOf(tree, sourceId)!;
       const sameParent = sourceInfo.parentId === parentId;
-      const adjust =
-        sameParent && sourceInfo.index < info.index ? -1 : 0;
-      index = info.index + adjust + (op.kind === 'reorder-after' ? 1 : 0);
+      const adjust = sameParent && sourceInfo.index < info.index ? -1 : 0;
+      index = info.index + adjust + (op.kind === "reorder-after" ? 1 : 0);
     }
 
     const next = treeModel.place(tree, sourceId, { parentId, index });