* feat: add voice mode for chat input
Adds a voice input button to the chat composer with three transcription engines:
in-browser Web Speech API, in-browser Whisper via @huggingface/transformers, and
a server-side OpenAI Whisper fallback gated on KANDEV_VOICE_OPENAI_API_KEY.
User-configurable from a new /settings/voice-mode page:
- Master on/off toggle (defaults to on; opt-out, not opt-in)
- Engine preference (auto / Web Speech / Whisper Web / Whisper Server)
- Language hint (auto-detect or BCP-47 pinned)
- Activation mode (click-to-toggle or hold-to-talk)
- Auto-send after transcription
- Whisper Web model size (tiny / base / small)
- Editable Cmd+Shift+M keyboard shortcut
Voice settings live under user_settings.voice_mode as a nested JSON object —
no schema migration. Setting changes broadcast via the existing
user.settings.updated WS event so any open chat tab updates live.
The mic button is rendered on the right of the composer alongside the send
button (round primary fill; destructive fill with pulse ring while recording).
On browsers without a usable engine (e.g. iOS Chrome over HTTP) the button
stays visible as a muted greyed icon — tapping it surfaces a toast with the
reason (typically a missing secure context).
Whisper Web runs in a Web Worker with fp16 decoder weights (avoids the
MatMulNBits scale-missing crash that q4/q8 hit on WASM). Models are pulled
from the onnx-community/* mirror and cached by transformers.js in the Cache
Storage on first use.
* fix: address voice mode PR review feedback and E2E selector clash
Bot-review fixes from #1159:
- Map http.MaxBytesError from c.FormFile to 413 instead of bare 400.
- Strip BCP-47 region suffix before passing language hint to Whisper Web.
- Recover from worker crash: terminate + null worker + reset ready flag so
next init/transcribe creates a fresh worker instead of hanging.
- Read live store state via storeApi.getState() in voice-mode settings
savers to avoid stale-closure clobbering concurrent settings updates.
- Detach Web Speech callbacks before abort() so trailing onend/onerror
events don't mutate hook state after cancel().
- Spread caller init before method/body in voice-api fetch so a caller-
supplied init can't override the multipart POST.
- Replace t.Fatalf with t.Errorf+return inside test HTTP handler goroutine
(FailNow from non-test goroutine is unsafe).
- Add Enabled/AutoSend zeroing assertions in partial-update test so the
bool-overwrite-on-PATCH behavior is locked in explicitly.
E2E fix:
- toolbar-overflow spec used button.rounded-full which now matches both
the send and voice buttons (strict-mode violation). Switched to the
submit-message-button testid for an unambiguous locator.
* fix: scope voice settings rollback + whisper worker error to changed keys
Round 2 of PR review feedback on #1159:
- voice-mode settings rollback now restores only the keys patched by the
failing request (not the whole snapshot), preserving concurrent edits
to unrelated voiceMode fields.
- Shortcut rollback diffs previous vs next and reverts only the changed
keys (restore prior value or delete if absent), preserving other
concurrent shortcut edits.
- Whisper worker error handler captures the worker reference at attach
time and only clears refs when this.worker still matches it — a stale
error from a previously replaced worker no longer nukes the active one.
- Update stale whisper-web-models JSDoc that still pointed at Xenova
mirrors.
* fix: voice mode progress scale, hold-mode race, race-aware rollback
Round 3 of PR review feedback on #1159:
- Normalise Whisper progress to 0–1 in ensureWhisperClient (transformers.js
emits 0–100, the button's display + the `ready: 1` convention expect
0–1 — fixes the 5000% mid-download display).
- Claim driverRef synchronously at the top of finishCapture so concurrent
pointerup + pointerleave invocations early-return instead of racing and
clobbering a freshly-started recording's ref.
- Race-aware rollback: voice-mode and shortcut catch branches now skip
reverting a key when latest[key] !== next[key]. A failed earlier request
no longer overwrites a later successful save to the same key.
- Update the Worker wire-protocol comment to show onnx-community/whisper-base
instead of the stale Xenova/* example.
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Co-authored-by: Kandev Agent <agent@kandev.dev>
João Salavisa
1fdeda904b