Files
James Pine 376afad852 Add "Log in with browser" cloud device login
Connects the desktop app to Voicebox Cloud without the user ever handling an
API key. One button in Settings → General opens the system browser to
voicebox.sh, the user authorizes while signed in, and the credential lands
back in the app automatically.

Backend (FastAPI):
- /cloud/login/start opens the browser to the cloud authorize page with a
  state we mint; the existing loopback server catches the redirect at
  /cloud/callback and exchanges the one-time code (server-to-server, over TLS)
  for a voicebox_ API key, verifies it against the API, and stores it.
- /cloud/status and /cloud/disconnect back the settings UI.
- state round-trip guards against login-CSRF; the key never crosses a browser
  URL and is never exposed to the frontend (status returns a prefix only).
- CloudSettings singleton row; config gains VOICEBOX_CLOUD_URL /
  VOICEBOX_CLOUD_API_URL (default the prod hosts, overridable for dev).

Frontend (React):
- CloudSection in Settings → General: "Log in with browser", polls status,
  shows the connected device + a dashboard link. API keys are the advanced
  path only, surfaced in the web dashboard.

The key is stored in the local app DB for now; OS keychain is a marked
follow-up.
2026-06-28 16:51:18 -07:00
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