[davior]

Summary

With AI_BACKEND=suite, Notes' live (Deepgram) dictation now streams to Gecko Suite's /api/v1/ai/speech/stt/stream instead of Notes' own relay (SN-9).

• The protocol is unchanged; only the address differs. The suite now holds the Deepgram key and counts the minutes under Notes, the same stream GVC's new microphone uses (davior/gvc#43).
• Notes' own Deepgram key is then no longer needed for dictation, which M8 (removing Notes' keys) depends on.
• In local mode nothing changes.

Changes:

• utils/dictationStream.ts works out where the stream goes. In suite mode it's the suite, with your chosen Deepgram model and app=notes; otherwise Notes' /stt-stream/ws, as today. deepgramStream.ts uses it.
• Messages: when the suite has no Deepgram key, the message says to set one up in Gecko Suite, and the suite refusing the page's origin has its own message.
• AI-backend setting: now read along with Notes' settings, so it's known before the first dictation.
• CSP: connect-src gains wss://suite.geckopico.com.

Not in this PR: voice mode (the Flux conversation, flux_stream) still uses Notes' own Deepgram key. It's a different Deepgram API, and moving it to the suite is a separate piece for M8.

Test plan

• cd frontend && npm test && npm run build: 236 tests pass, build succeeds. The new tests in utils/dictationStream.test.ts cover the stream address in suite mode (suite, app, model, encoded token) and in local mode (Notes' own relay).
• cd backend && pytest -q: 1429 passed, 1 skipped. There's no backend change.
• Not run: a real microphone against the deployed suite.

Deployment

1. Before pulling: deploy gecko-suite#16, the suite's live stream. It needs a Deepgram provider set up in the suite (the same key Notes has today is fine).
2. Configuration: nothing new.
3. Deploy. This rebuilds the frontend; the backend is unchanged but rebuilds with it.

   git pull origin main
   docker compose up --build -d

   Then hard-refresh.
4. Verify:
   • Dictate in a note or the assistant in Firefox, with the speech provider set to Deepgram: words appear as you speak, as before.
   • The suite's Usage page shows the seconds under Notes.
   • The browser console shows no CSP errors.
5. Roll back: redeploy the previous commit, and dictation goes back through Notes' own relay and key.

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