refactor(router): remove demo environment workaround

- Remove special redirect logic for demo environment
- Update comment about app startup architecture

Author: fulleni

lib/router/router.dart

@@ -107,20 +107,7 @@ GoRouter createRouter({
       const feedPath = Routes.feed;
       final isGoingToAuth = currentLocation.startsWith(authenticationPath);
 
-      // --- Workaround for Demo Environment ---
-      // In the demo environment, the initial auth state from the in-memory
-      // client might not be emitted before the first redirect check. If the app
-      // is still in the `initial` state, we explicitly redirect to the
-      // authentication page to begin the demo flow, avoiding the black screen.
-      if (appStatus == AppStatus.initial &&
-          environment == local_config.AppEnvironment.demo) {
-        print(
-          '  Redirect (Workaround): In demo mode with initial status. Forcing to authentication.',
-        );
-        return authenticationPath;
-      }
-
-      // With the new App startup architecture, the router is only active when
+      // With the current App startup architecture, the router is only active when
       // the app is in a stable, running state. The `redirect` function's
       // only responsibility is to handle auth-based route protection.
       // States like `configFetching`, `underMaintenance`, etc., are now