Added a `SessionState` sealed class to track the connection status and integrated it into the `DashboardScreen`. The dashboard now triggers a session validation on launch, showing a loading indicator during the check.
The `MainViewModel` has been updated with a `validateSession` function that:
- Pings the server using the stored access token.
- Attempts to refresh the token if a 401 Unauthorized response is received.
- Updates the `TokenStorage` with new tokens upon successful refresh.
- Redirects to logout if both tokens are invalid.
Additionally, the `APIService` was expanded with `ping` and `refresh` endpoints, and the `AppDatabase` version was incremented.
Maurice L.
ca1ad57f7e
