fix: Bug - Add logout in mobile version of settings, allow clearing data on android

Expose settings logout on mobile where the title bar is hidden, and enable
Capacitor data settings with storage visibility and local erase/sign-out.

Co-authored-by: Cursor <cursoragent@cursor.com>

agents-docs/features/authentication.md

@@ -12,6 +12,12 @@ Session-token authentication for the signaling server and product client.
 | Electron Local API | Separate in-memory bearer tokens | Proxies login to allowed signaling servers only |
 | Product client local DB | OS user account | SQLite and attachments are plaintext at rest |
 
+## Client logout
+
+- Desktop: title-bar menu **Logout** (`UserLogoutService`).
+- Mobile / all platforms: settings modal footer **Logout** (`data-testid="settings-logout-button"`) — required because the title bar is hidden on mobile breakpoints.
+- Logout disconnects realtime sessions, clears the persisted current-user id, resets NgRx room/user/message state, and navigates to `/login`.
+
 ## Login / register response
 
 ```json

agents-docs/features/mobile-capacitor.md

@@ -256,6 +256,7 @@ Network security configs:
 - `MobileCallSessionService` — CallKit + foreground service + in-call notifications.
 - `App` bootstrap — initializes mobile persistence, lifecycle, app-update polling, call-session, and push registration wiring.
 - `MobileAppUpdateService` — periodic Play Store / App Store checks (30 min) and settings UI actions; mirrors Electron `DesktopAppUpdateService` polling but uses native store APIs instead of release manifests.
+- Settings → **Data** on Capacitor shells shows the private app-data root and **Erase user data** (`LocalUserDataService` clears SQLite, Capacitor attachment files, auth tokens, and `metoyou_*` localStorage keys, then logs out).
 
 ## Phase 3 completion notes