docs: update changelog and readme with new feature details

Add recent feature entries to CHANGELOG, including inline image row centering, AI chat docking, comment hover tooltips, temporary‑note trash button, code‑block overlay controls, stress‑accent button, reading‑position restore, and slash‑menu layout fixes. Update README and Russian README to reflect these changes.
feat(editor): center inline image rows by default via CSS :has()
2026-07-02 14:53:53 +03:00 · 2026-07-02 14:51:50 +03:00
11 changed files with 113 additions and 291 deletions
@@ -14,8 +14,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

 - **Place several images side by side in a row.** A new "Inline (side by
  side)" alignment mode in the image bubble menu renders consecutive inline
-  images as a row that wraps onto the next line on narrow screens. Unlike the
-  float modes, text does not wrap around inline images. The mode round-trips
+  images as a row that wraps onto the next line on narrow screens. The row is
+  centered horizontally by default in modern browsers (CSS `:has()`), falling
+  back to start-aligned rows in browsers without support. Unlike the float
+  modes, text does not wrap around inline images. The mode round-trips
  losslessly through markdown as `data-align`, like the other alignment
  values.

@@ -84,6 +86,53 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  with the `||text||` input rule; the rendered span blurs until clicked to reveal.
  The mark is preserved losslessly through Markdown export/import (as a raw
  `<span data-spoiler="true">…</span>`) and on public shares. (#259)
+- **Dock the AI chat window into the side menu.** The floating chat window can
+  be pinned to the sidebar — drag it onto the navbar (a drop-zone highlight
+  shows where it lands) or use the new "Dock to sidebar" header button; while
+  docked it fills the sidebar area and follows its live size. "Undock" (or
+  dragging it back out) restores the floating window, a collapsed/absent
+  sidebar falls back to floating, and the docked state survives a reload.
+  (#276, #282)
+- **Hovering commented text shows the comment thread in a tooltip.** Pointing
+  at a highlighted comment mark pops a small card with the author and plain
+  text of the root comment and its replies, so a thread can be skimmed without
+  opening the side panel. The card appears after a short delay (no flicker on a
+  passing glance), skips resolved and text-less threads, and dismisses on
+  scroll or click — clicking a mark still opens the comments panel. (#268,
+  #271)
+- **"Move to trash" button in the temporary-note banner.** Besides "Make
+  permanent", the banner on an open temporary note now also offers to trash the
+  note immediately instead of waiting out its lifetime. It reuses the regular
+  soft-delete path, so the "Page moved to trash" undo toast is the safety net —
+  no confirmation dialog. (#273, #277)
+- **Code-block controls float as an overlay instead of taking a row above the
+  code.** The language selector and copy button now sit in the block's top-right
+  corner, and the selector stays invisible until the block is hovered or the
+  selector is focused, so reading code is chrome-free. In read-only views only
+  the copy button renders. (#275, #278)
+- **The AI agent is told about your page edits between turns.** The server
+  snapshots the open page's Markdown at the end of every agent turn and, on the
+  next turn, injects a unified diff of what changed in between, so the agent
+  knows its earlier copy of the page is stale and builds on the user's edits
+  instead of reverting or overwriting them. The diff is whitespace-normalized
+  (pure formatting churn injects nothing) and size-capped, with a hint to
+  re-read the full page via `getPage` when truncated. (#274, #281)
+- **Stress-accent button (U+0301) in the bubble menu.** Select a vowel and
+  toggle a combining acute accent over it — a Russian-style stress mark. The
+  accent is stored as plain text (no custom mark), so it survives Markdown/HTML
+  export, full-text search and public shares unchanged; the toggle is a single
+  undo step and re-clicking removes the accent. (#270, #280)
+- **Reading position survives a reload.** The editor remembers how far you
+  scrolled in each page (per tab, in `sessionStorage`) and restores that
+  position after an F5 or reopening the document, waiting for the collaborative
+  content to finish laying out first. A URL `#hash` anchor still wins — restore
+  is a no-op then. (#266, #267)
+- **The slash menu finds commands typed in the wrong keyboard layout.** A query
+  typed with the wrong layout active (e.g. `/сщву` for `/code`, or `/cyjcrf`
+  for the Cyrillic «сноска» → Footnote) is additionally remapped ЙЦУКЕН↔QWERTY
+  by physical key position and matched against the commands; genuine Cyrillic
+  search terms keep priority over remapped candidates, and short wrong-layout
+  prefixes match by command title. (#283, #285, #287)

 ### Changed

@@ -149,6 +198,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  emits a single-use "intentional clear" signal that lets exactly that one empty
  write through the guard, so genuinely emptying a page is persisted while
  accidental empties are blocked. (#248, #251)
+- **Ctrl+Z works again right after using a table menu.** Closing a table
+  row/column menu (grip or chevron) left focus on the menu's portaled target
+  outside the editor, so undo keystrokes went nowhere until you clicked back
+  into a cell. The editor is now refocused after the menu closes — unless you
+  deliberately moved focus to another input or editable (e.g. the page title).
+  (#269, #279)
+- **The AI reindex progress counter no longer freezes at 0.** Right after
+  "Reindex now" the client could read the stale pre-reindex snapshot of an
+  already-indexed workspace (`reindexing=false`, all pages counted) as
+  "finished" and stop polling on the very first tick, leaving the counter
+  frozen until a manual reload. Polling now keeps going until it has actually
+  observed the active run. (#262, #264)
+- **An MCP edit can no longer be silently lost to a duplicate collab document.**
+  When the agent addressed a page by its short slugId, the MCP opened a
+  collaboration document named after that slugId while the web editor always
+  uses the page's canonical UUID — two independent live documents for one page,
+  whose debounced stores clobbered each other. The MCP now resolves every page
+  id to the canonical UUID before opening the collab doc (a UUID input
+  short-circuits locally; a slugId is resolved once and cached). (#260, #265)

 ### Security

@@ -104,7 +104,7 @@ community feature, with no enterprise license. Open it from the page header; the
 - ✅ **Page templates** — flag a page as a template and embed its whole content live into other pages; edits to the template propagate to every place it is inserted (whole-page transclusion on top of the existing synced blocks).
 - ✅ **Public-share AI assistant** — anonymous visitors of a shared page can ask the AI agent, scoped strictly to that share's page tree (read-only, share-scoped search), behind a workspace toggle.
 - ✅ **Footnotes** — academic-style footnotes: a numbered superscript reference inline (read it in place via a hover popover), with the note text living as a real, editable block at the bottom of the page; auto-numbered, collaboration-safe, and round-trips through Markdown export/import and the AI agent / MCP.
- ✅ **Temporary notes** — mark a note as temporary and it auto-moves to Trash after a configurable per-workspace lifetime (default 24h) unless made permanent first; create one in a click from the Home screen, any space overview, or the space sidebar, with a "Make permanent" rescue banner on the open note.
+- ✅ **Temporary notes** — create a note as temporary and it auto-moves to Trash after a configurable per-workspace lifetime (default 24h) unless made permanent first; create one in a click from the Home screen, any space overview.

 ### In progress

@@ -187,14 +187,17 @@ start the new migrations apply on top of your existing schema (`CREATE EXTENSION
 - Spaces
 - Permissions management
 - Groups
- Comments (with resolve / re-open)
+- Comments (with resolve / re-open and hover tooltips showing the comment text)
 - Page history
 - Search
 - File attachments
 - Embeds (Airtable, Loom, Miro and more)
 - Translations (10+ languages)
 - Embedded MCP server (`/mcp`)
- AI agent chat over your wiki (read + write, RAG search, external MCP / web access)
+- AI agent chat over your wiki (read + write, RAG search, external MCP / web access); the chat window docks into the side menu, and the agent is told about your in-page edits between turns
+- Code-block buttons as an overlay, with the language selector revealed on hover
+- Stress-accent button (U+0301) in the bubble menu
+- Reading scroll position restored on reload

 ### Screenshots

@@ -105,7 +105,7 @@ real-time-коллаборации Docmost, поэтому запись нико
 - ✅ **Шаблоны страниц** — пометить страницу шаблоном и вставлять её содержимое живой ссылкой в другие страницы; правки шаблона распространяются на все места вставки (whole-page-транслюзия поверх существующих synced-блоков).
 - ✅ **AI-ассистент на публичных шарах** — анонимный зритель расшаренной страницы может спросить AI-агента, который ищет строго по дереву этой шары (read-only, share-scoped поиск), за тумблером воркспейса.
 - ✅ **Сноски** — сноски академического вида: нумерованная ссылка-надстрочник прямо в тексте (читается на месте во всплывающем окне по наведению), а текст сноски живёт реальным редактируемым блоком внизу страницы; авто-нумерация, безопасна для совместного редактирования, переживает экспорт/импорт Markdown и доступна AI-агенту / MCP.
- ✅ **Временные заметки** — пометьте заметку временной, и она автоматически уедет в корзину по истечении настраиваемого срока жизни воркспейса (по умолчанию 24 ч), если её предварительно не сделать постоянной; создать такую можно в один клик с домашнего экрана, с обзора любого пространства или из сайдбара пространства, а на открытой заметке есть баннер «Сделать постоянной».
+- ✅ **Временные заметки** — создайте временную заметку, и она автоматически уедет в корзину по истечении настраиваемого срока жизни (по умолчанию 24 ч); создать такую можно в один клик с домашнего экрана, с обзора любого пространства или из сайдбара пространства.

 ### В процессе

@@ -174,14 +174,18 @@ dump/restore, существующий каталог данных переис
 - Пространства (Spaces)
 - Управление правами доступа
 - Группы
- Комментарии (с резолвом / переоткрытием)
+- Комментарии (с резолвом / переоткрытием и всплывающими подсказками с текстом комментария при наведении)
 - История страниц
 - Поиск
 - Вложения файлов
 - Встраивания (Airtable, Loom, Miro и другие)
 - Переводы (10+ языков)
 - Встроенный MCP-сервер (`/mcp`)
- Чат с AI-агентом по вики (чтение + запись, RAG-поиск, внешние MCP / доступ в интернет)
+- Чат с AI-агентом по вики (чтение + запись, RAG-поиск, внешние MCP / доступ в интернет); окно чата закрепляется в боковом меню, а агент узнаёт о ваших правках страницы между ходами
+- Кнопки код-блока оверлеем, селектор языка появляется при наведении
+- Кнопка «Ударение» (U+0301) в bubble-меню
+- Позиция чтения (прокрутка) восстанавливается после перезагрузки
+- Slash-меню терпимо к неправильной раскладке (ЙЦУКЕН↔QWERTY)

 ### Скриншоты

@@ -71,3 +71,22 @@
  }
 }

+/* Inline image rows (#284): center the anonymous line boxes formed by
+   consecutive [data-image-align="inline"] node-view containers. A row has no
+   DOM wrapper of its own, so its horizontal placement is controlled by the
+   text-align of the nearest block ancestor (the editor root or a nested
+   block container: blockquote, callout, list item, table cell, details).
+   Centering is enabled only in containers that actually hold an inline
+   image (:has), and every other child of such a container gets its default
+   alignment back so ordinary text is unaffected. Explicit per-block
+   alignment from the toolbar is an inline style and still wins. Browsers
+   without :has() degrade to left-pinned rows. */
+.ProseMirror:has(> [data-image-align="inline"]),
+.ProseMirror :has(> [data-image-align="inline"]) {
+  text-align: center;
+}
+
+.ProseMirror:has(> [data-image-align="inline"]) > :not([data-image-align="inline"]),
+.ProseMirror :has(> [data-image-align="inline"]) > :not([data-image-align="inline"]) {
+  text-align: start;
+}
@@ -303,11 +303,6 @@ describe('buildSystemPrompt page-changed note (#274)', () => {
    expect(prompt).toContain(NOTE_MARKER);
    expect(prompt).toContain('-old line');
    expect(prompt).toContain('+new line');
-    // Strengthened note (#274): instructs a fresh re-read via getPage and steers
-    // the agent toward small, targeted edits instead of a full-page overwrite.
-    expect(prompt).toContain('getPage');
-    expect(prompt.toLowerCase()).toContain('targeted');
-    expect(prompt).toContain('editPageText');
    // Inside the safety sandwich: the trailing SAFETY block follows the note.
    expect(prompt.lastIndexOf(SAFETY_MARKER)).toBeGreaterThan(
      prompt.indexOf(NOTE_MARKER),
@@ -85,17 +85,11 @@ const INTERRUPT_NOTE =
 const PAGE_CHANGED_NOTE =
  'NOTE: The user edited the open page AFTER your last response in this ' +
  'conversation, so any copy of that page you produced or remember from earlier ' +
-  'is now STALE and must not be reused. Before you edit the page, you MUST first ' +
-  're-read its current content with the getPage tool and base your work on that ' +
-  'live version — never on your earlier copy or on the transcript. The unified ' +
-  'diff below shows exactly what the user changed since you last spoke (lines ' +
-  'starting with "-" were removed, "+" were added) and is the source of truth. ' +
-  'Preserve every one of the user\'s edits: make the smallest change that ' +
-  'satisfies the request using the targeted edit tools (editPageText, patchNode, ' +
-  'insertNode, deleteNode) rather than replacing the whole page, and do not ' +
-  'revert, drop, or overwrite anything the user changed. If a full rewrite is ' +
-  'truly unavoidable, start from the current getPage content and carry over all ' +
-  'of the user\'s edits.';
+  'is now STALE. The unified diff below shows exactly what changed since you last ' +
+  'spoke (lines starting with "-" were removed, "+" were added) and is the source ' +
+  'of truth. Preserve the user\'s edits: build on the current page, do not revert ' +
+  'or overwrite their changes. If you need the full up-to-date page, re-read it ' +
+  'with the getPage tool before editing.';

 /**
 * Sanitize a value interpolated into a prompt XML-ish attribute (e.g.
@@ -356,32 +356,6 @@ describe('flushAssistant', () => {
    expect(flushed.toolCalls).not.toBeNull();
    expect(flushed.metadata.error).toBe('boom');
  });
-
-  // #274 observability: the page-change diff the agent saw this turn is persisted
-  // to metadata.pageChanged when a non-empty diff was injected, and omitted when
-  // the diff is empty/whitespace or the arg is not supplied.
-  it('persists metadata.pageChanged when a non-empty diff was injected', () => {
-    const f = flushAssistant([], '', 'completed', {
-      pageChanged: { title: 'Doc', diff: '@@ -1 +1 @@\n-old\n+new' },
-    });
-    expect(f.metadata.pageChanged).toEqual({
-      title: 'Doc',
-      diff: '@@ -1 +1 @@\n-old\n+new',
-    });
-  });
-
-  it('omits metadata.pageChanged for an empty/whitespace diff or a missing arg', () => {
-    const whitespace = flushAssistant([], '', 'completed', {
-      pageChanged: { title: 'Doc', diff: '   \n  ' },
-    });
-    expect('pageChanged' in whitespace.metadata).toBe(false);
-
-    const nullArg = flushAssistant([], '', 'completed', { pageChanged: null });
-    expect('pageChanged' in nullArg.metadata).toBe(false);
-
-    const omitted = flushAssistant([], '', 'streaming');
-    expect('pageChanged' in omitted.metadata).toBe(false);
-  });
 });

 /**
@@ -685,7 +685,7 @@ export class AiChatService implements OnModuleInit {
    // no-op (guarded below) so the turn still streams to the user.
    let assistantId: string | undefined;
    try {
-      const seed = flushAssistant([], '', 'streaming', { pageChanged });
+      const seed = flushAssistant([], '', 'streaming');
      const seeded = await this.aiChatMessageRepo.insert({
        chatId,
        workspaceId: workspace.id,
@@ -720,7 +720,7 @@ export class AiChatService implements OnModuleInit {
        await this.aiChatMessageRepo.update(
          assistantId,
          workspace.id,
-          flushAssistant(capturedSteps, '', 'streaming', { pageChanged }),
+          flushAssistant(capturedSteps, '', 'streaming'),
          { onlyIfStreaming: true },
        );
      } catch (err) {
@@ -860,7 +860,6 @@ export class AiChatService implements OnModuleInit {
              // resolved from the admin-configured provider settings (in
              // closure scope here). Omitted/0 = no limit.
              maxContextTokens: resolved?.chatContextWindow,
-              pageChanged,
            }),
          );
          // Lifecycle: release the external MCP clients leased for this turn.
@@ -912,7 +911,6 @@ export class AiChatService implements OnModuleInit {
          await finalizeAssistant(
            flushAssistant(capturedSteps, inProgressText, 'error', {
              error: errorText,
-              pageChanged,
            }),
          );
          await closeExternalClients();
@@ -942,9 +940,7 @@ export class AiChatService implements OnModuleInit {
              `steps=${steps.length}`,
          );
          await finalizeAssistant(
-            flushAssistant(capturedSteps, inProgressText, 'aborted', {
-              pageChanged,
-            }),
+            flushAssistant(capturedSteps, inProgressText, 'aborted'),
          );
          await closeExternalClients();
          // Advance the page snapshot even on abort (#274): an agent edit that
@@ -1510,7 +1506,6 @@ export function flushAssistant(
    contextTokens?: number;
    maxContextTokens?: number;
    error?: string;
-    pageChanged?: { title: string; diff: string } | null;
  },
 ): AssistantFlush {
  const finished = capturedSteps ?? [];
@@ -1543,15 +1538,6 @@ export function flushAssistant(
  if (extra?.maxContextTokens)
    metadata.maxContextTokens = extra.maxContextTokens;
  if (extra?.error) metadata.error = extra.error;
-  // Persist the page-change diff the agent saw this turn (#274 observability),
-  // so history / the Markdown export can show what the user changed. Only when
-  // a non-empty diff was actually injected into the prompt this turn.
-  if (extra?.pageChanged && extra.pageChanged.diff?.trim().length) {
-    metadata.pageChanged = {
-      title: extra.pageChanged.title,
-      diff: extra.pageChanged.diff,
-    };
-  }

  return {
    content: stepsText + trailing,
@@ -269,168 +269,6 @@ describe('buildChatMarkdown (server) — structure', () => {
    expect(md).toContain('**⚠️ Error:** 401: Unauthorized');
  });

-  // #274 observability: an assistant row whose turn started with a user edit to
-  // the open page carries metadata.pageChanged = { title, diff }; the export
-  // renders the diff the agent saw, before the message body.
-  it('renders the persisted page-change diff block for an assistant row', () => {
-    const md = buildChatMarkdown({
-      title: 'T',
-      chatId: 'c',
-      rows: [
-        row({
-          role: 'assistant',
-          content: 'answer',
-          metadata: {
-            pageChanged: { title: 'Doc', diff: '@@ -1 +1 @@\n-old\n+new' },
-          } as never,
-        }),
-      ],
-    });
-    expect(md).toContain(
-      'The user edited this page before this turn; the diff the agent saw:',
-    );
-    expect(md).toContain('("Doc")');
-    expect(md).toContain('-old');
-    expect(md).toContain('+new');
-    // The diff sits before the message body (chronological: change, then reply).
-    expect(md.indexOf('-old')).toBeLessThan(md.indexOf('answer'));
-  });
-
-  it('does not render the page-change block when metadata.pageChanged is absent', () => {
-    const md = buildChatMarkdown({
-      title: 'T',
-      chatId: 'c',
-      rows: [row({ role: 'assistant', content: 'answer' })],
-    });
-    expect(md).not.toContain(
-      'The user edited this page before this turn; the diff the agent saw:',
-    );
-  });
-
-  // #288 F1/F2: an empty page title must render the BARE heading with no
-  // `("…")` suffix (the `pc.title ? … : …` false branch).
-  it('renders the page-change heading with no title suffix when title is empty', () => {
-    const md = buildChatMarkdown({
-      title: 'T',
-      chatId: 'c',
-      rows: [
-        row({
-          role: 'assistant',
-          content: 'answer',
-          metadata: {
-            pageChanged: { title: '', diff: '@@ -1 +1 @@\n-old\n+new' },
-          } as never,
-        }),
-      ],
-    });
-    // Bare heading, single line, no parenthesized title.
-    expect(md).toContain(
-      '> **📝 The user edited this page before this turn; the diff the agent saw:**',
-    );
-    expect(md).not.toContain('("');
-    expect(md).toContain('-old');
-  });
-
-  // #288 F1: the page title is UNTRUSTED cross-user data, so a title carrying a
-  // newline / backtick / `"` / `<`/`>` must be neutralized by escapeAttr before
-  // it is interpolated into the `> **…**` blockquote heading — otherwise it
-  // could break the blockquote onto multiple lines or inject markup/HTML into
-  // the downloaded .md. escapeAttr strips `<>"` and collapses whitespace runs to
-  // a single space, so `Ev"il\n> `x` <b>` becomes ``Evil `x` b``.
-  it('escapes an untrusted page title in the page-change heading', () => {
-    const md = buildChatMarkdown({
-      title: 'T',
-      chatId: 'c',
-      rows: [
-        row({
-          role: 'assistant',
-          content: 'answer',
-          metadata: {
-            pageChanged: {
-              title: 'Ev"il\n> `x` <b>',
-              diff: '@@ -1 +1 @@\n-old\n+new',
-            },
-          } as never,
-        }),
-      ],
-    });
-    // The heading stays a single blockquote line with the escaped title.
-    expect(md).toContain(
-      '> **📝 The user edited this page before this turn; the diff the agent saw: ("Evil `x` b")**',
-    );
-    // No raw attribute/markup breakers survived from the title.
-    expect(md).not.toContain('Ev"il');
-    expect(md).not.toContain('<b>');
-  });
-
-  // #288 review F1: escapeAttr ALONE is insufficient for this MARKDOWN sink —
-  // link/image syntax survives it. A cross-user title with `![x](url)` /
-  // `[phish](url)` must NOT become a working remote image or clickable link in
-  // the downloaded .md; markdownHeadingSafe backslash-escapes `[`/`]` so both are
-  // inert. (Non-vacuous: fails against the escapeAttr-only version, which left
-  // `](https://` intact.)
-  it('neutralizes markdown link/image syntax in an untrusted page title', () => {
-    const md = buildChatMarkdown({
-      title: 'T',
-      chatId: 'c',
-      rows: [
-        row({
-          role: 'assistant',
-          content: 'answer',
-          metadata: {
-            pageChanged: {
-              title:
-                '![x](https://attacker.example/t.png) and [click](https://phish.example)',
-              diff: '@@ -1 +1 @@\n-old\n+new',
-            },
-          } as never,
-        }),
-      ],
-    });
-    // No WORKING image/link syntax survives — the `[…]` sits escaped as `\[…\]`,
-    // so the unescaped `![x](` image and `[click](` link markers are gone. (We
-    // deliberately do NOT assert `not.toContain('](https://')`: after escaping the
-    // literal `\](https://` still contains `](https://` as a raw substring — that
-    // check would false-fail even though the link is inert.)
-    expect(md).not.toContain('![x](');
-    expect(md).not.toContain('[click](');
-    // The brackets are backslash-escaped, so `[text](url)`/`![text](url)` are inert.
-    expect(md).toContain('\\[');
-    expect(md).toContain('\\]');
-    // The heading stays a SINGLE blockquote line (no newline injected).
-    const headingLine = md
-      .split('\n')
-      .find((l) => l.includes('the diff the agent saw:'));
-    expect(headingLine).toBeDefined();
-    expect(headingLine).toContain('\\[x\\]');
-    expect(headingLine).toContain('\\[click\\]');
-  });
-
-  // #288 internal review Finding 2: a NON-empty title made up entirely of
-  // escapeAttr breakers (`<>"`) escapes to '' — the ternary must then fall to the
-  // BARE heading with NO `("…")` suffix. Locks the ternary-on-escaped-value
-  // behavior (distinct from the empty-string input test above).
-  it('renders the bare heading for a title that escapes to empty', () => {
-    const md = buildChatMarkdown({
-      title: 'T',
-      chatId: 'c',
-      rows: [
-        row({
-          role: 'assistant',
-          content: 'answer',
-          metadata: {
-            pageChanged: { title: '<>"', diff: '@@ -1 +1 @@\n-old\n+new' },
-          } as never,
-        }),
-      ],
-    });
-    expect(md).toContain(
-      '> **📝 The user edited this page before this turn; the diff the agent saw:**',
-    );
-    expect(md).not.toContain('("');
-    expect(md).toContain('-old');
-  });
-
  it('escapes embedded triple-backtick fences with a longer delimiter', () => {
    const md = buildChatMarkdown({
      title: 'T',
@@ -15,7 +15,6 @@
 */

 import type { AiChatMessage } from '@docmost/db/types/entity.types';
-import { escapeAttr } from './ai-chat.prompt';

 /** Supported export label languages. Defaults to English. */
 export type ExportLang = 'en' | 'ru';
@@ -64,7 +63,6 @@ const LABELS: Record<
    tools: Record<string, string>;
    ranTool: (name: string) => string;
    stillGenerating: string;
-    pageEditedByUser: string;
  }
 > = {
  en: {
@@ -85,8 +83,6 @@ const LABELS: Record<
    ranTool: (name) => `Ran tool ${name}`,
    stillGenerating:
      'This message is still being generated — the export captured a partial, in-progress response.',
-    pageEditedByUser:
-      'The user edited this page before this turn; the diff the agent saw:',
  },
  ru: {
    untitled: 'Без названия',
@@ -106,29 +102,9 @@ const LABELS: Record<
    ranTool: (name) => `Выполнил инструмент ${name}`,
    stillGenerating:
      'Это сообщение всё ещё генерируется — экспорт захватил частичный, незавершённый ответ.',
-    pageEditedByUser:
-      'Пользователь изменил страницу перед этим ходом; дифф, который видел агент:',
  },
 };

-/**
- * Make an untrusted title safe to interpolate into a Markdown blockquote
- * HEADING. escapeAttr() neutralizes the XML/HTML breakers (`<` `>` `"`) and
- * collapses whitespace for the PROMPT sink (`page="…"`), but this export sink is
- * MARKDOWN — link/image syntax survives escapeAttr. So additionally backslash-
- * escape `[` and `]`: that disables both `[text](url)` links and `![text](url)`
- * images, so a cross-user title like `![x](http://evil)` or `[phish](http://evil)`
- * cannot inject a remote (auto-loading) image or a clickable link into the
- * downloaded .md disguised as a trusted system annotation. A bare `(url)` with no
- * preceding `[]` is inert Markdown, so brackets are the only security-critical
- * characters here. (We leave backticks to escapeAttr's whitespace pass — a title
- * shown as inline code cannot escape the blockquote line or load a resource, so
- * it is not a security concern for this sink.)
- */
-function markdownHeadingSafe(title: string): string {
-  return escapeAttr(title).replace(/[[\]]/g, (m) => `\\${m}`);
-}
-
 /** True for AI SDK tool parts (static `tool-*` or `dynamic-tool`). */
 function isToolPart(type: string): boolean {
  return type.startsWith('tool-') || type === 'dynamic-tool';
@@ -232,23 +208,6 @@ function rowParts(row: AiChatMessage): ExportPart[] {
    : [{ type: 'text', text: row.content ?? '' }];
 }

-/** The persisted page-change diff the agent saw this turn (#274), when any. */
-function pageChangedOf(
-  row: AiChatMessage,
-): { title: string; diff: string } | undefined {
-  const meta = (row.metadata ?? {}) as {
-    pageChanged?: { title?: string; diff?: string };
-  };
-  const pc = meta.pageChanged;
-  if (pc && typeof pc.diff === 'string' && pc.diff.trim().length > 0) {
-    return {
-      title: typeof pc.title === 'string' ? pc.title : '',
-      diff: pc.diff,
-    };
-  }
-  return undefined;
-}
-
 /**
 * Serialize a chat to a Markdown string from its persisted rows. Source = DB
 * ONLY (no live client state). A row whose `status` is still 'streaming' is an
@@ -307,26 +266,6 @@ export function buildChatMarkdown(args: {
      blocks.push(`<!-- ${iso} -->`);
    }

-    // Page-change observability (#274): show the diff the agent saw at the start
-    // of this turn, before its response, so the export reflects the stale-page
-    // warning the model received.
-    const pc = pageChangedOf(row);
-    if (pc) {
-      // The page title is UNTRUSTED cross-user data (a collaborative page's title
-      // controllable by another user). escapeAttr() alone (the prompt sink) is
-      // INSUFFICIENT here: this is a MARKDOWN sink, so we neutralize link/image
-      // syntax too (backslash-escaping `[`/`]`) before interpolating it into this
-      // `> **…**` blockquote heading — otherwise `![x](url)` / `[phish](url)` would
-      // inject a remote image or clickable link into the downloaded .md. An
-      // all-`<>"` title escapes to empty and correctly falls to the bare heading.
-      // The diff body is already safe via fence(). (#288 review F1.)
-      const safeTitle = markdownHeadingSafe(pc.title);
-      const heading = safeTitle
-        ? `${L.pageEditedByUser} ("${safeTitle}")`
-        : L.pageEditedByUser;
-      blocks.push(`> **📝 ${heading}**\n\n${fence(pc.diff, 'diff')}`);
-    }
-
    blocks.push(...renderMessageParts(rowParts(row), lang));

    // A still-'streaming' row is an interrupted/in-progress turn captured by the
@@ -449,7 +449,9 @@ export function applyAlignment(container: HTMLElement, align: string) {
    // the next line when the viewport is narrow. The right/bottom padding
    // provides the gap between images in a row and between wrapped rows;
    // vertical-align: top keeps rows of different-height images aligned by
-    // their top edge.
+    // their top edge. Horizontal centering of the whole row is handled by the
+    // client stylesheet (media.css) via a :has() rule on the parent block
+    // container, since the row has no wrapper element of its own.
    container.style.display = "inline-block";
    container.style.verticalAlign = "top";
    container.style.padding = "0 10px 10px 0";