Root cause: LoginViewModel.logout() was async (viewModelScope.launch),
so _uiState.isConnected remained true after navigating to login.
LoginScreen's LaunchedEffect immediately navigated back to dashboard,
where APIs failed with 401 again → infinite loop.
Fixes:
- SessionManager: add _invalidating flag to prevent concurrent 401 handling
- AuthInterceptor: check isSessionValid before invalidating
- LoginViewModel: update _uiState synchronously in logout(), clear token
before launching coroutine for prefs.clear()
- LoginViewModel: call SessionManager.restoreSession() after successful login
- MainActivity: remove restoreSession() from logout handler (was incorrectly
re-validating session right after invalidation)
Bump to v1.7.1 (versionCode 10)
