The editor lagged while typing (worse with doc size, and under collaboration the
same cost is paid for every REMOTE keystroke). ProseMirror itself was fine — the
overhead was the surrounding work done on every transaction. Behavior is 1:1;
only WHEN work runs changed.
- getJSON() off the keystroke path: `onUpdate` no longer serializes the whole doc
synchronously — the serialization now runs inside a 3s debounce (new hook
use-page-content-cache.ts), flushed on unmount so the last snapshot isn't lost.
- footnote numbering: merged 3 per-docChanged O(n) doc walks into one, and
short-circuit the whole-doc renumber when the doc has no footnotes and the
transaction didn't insert one (step-slice scan — covers typing/paste/collab).
- toolbar: replaced per-keystroke `editor.can().undo()/.redo()` dry-runs with
cheap history-depth reads (Yjs undoManager stack length / pm-history depth).
- render side-effect bug: `remote.attach()` moved out of the render body into a
useEffect.
- debounced the TOC all-headings rescan and memoized the slash-command suggestion
build (was rebuilt twice per keystroke).
- node menus (image/video/audio/pdf/callout/subpages): the per-transaction
selectors early-return a cheap isActive check instead of running getAttributes +
multiple alignment probes while their node type is inactive (shouldShow still
controls display — appears exactly when it did).
- code blocks: the global selectionUpdate listener is now added only for mermaid
blocks (the only consumer of the selected state), eliminating N listeners +
N setStates per caret move for normal code blocks.
Deferred (documented, collab hot-path risk): full conditional menu MOUNTING
(menu-less-frame risk on same-tx context switch) and code-block re-tokenization
debounce / language-persist (self-dispatching meta tx + node-attr writes interact
with collab/undo). The route split from #342 already keeps lowlight off startup.
Gate: editor-ext build + 252/252 tests, client editor tests pass, tsc --noEmit 0,
client build ok. New tests: footnote no-footnote-doc → 0 traversals + numbering
unchanged; page-content-cache onUpdate-no-sync-getJSON + flush-on-unmount.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add a gated "Transcribe" action to the audio block's bubble menu so an
already-embedded audio file can be transcribed (previously only live
microphone dictation was supported). The button fetches the embedded
file, normalizes its MIME type to the STT whitelist, reuses the existing
POST /ai-chat/transcribe endpoint, and inserts the result as a paragraph
right below the audio block.
- Mount the previously-unwired AudioMenu in page-editor (edit mode only),
which also surfaces the existing Download/Delete actions for audio.
- Gate the Transcribe button on settings.ai.dictation; show a spinner and
block double-submits while transcribing; map errors like the mic hook.
- Disambiguate duplicate-src blocks by re-scanning the doc and inserting
after the audio node closest to the originally selected one.
- Add i18n keys (en-US, ru-RU): Transcribe, Transcribing…, No speech
detected, plus ru-RU translations for the transcription error messages.
agent_coder
claude_code
Philip Okugbe