Fix demo mode black screen no content

lib/router/router.dart

@@ -89,12 +89,24 @@ GoRouter createRouter({
         '  AppStatus: $appStatus',
       );
 
-      // --- Define Key Paths ---
       const rootPath = '/';
       const authenticationPath = Routes.authentication;
       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
       // the app is in a stable, running state. The `redirect` function's
       // only responsibility is to handle auth-based route protection.

pubspec.lock

@@ -72,7 +72,7 @@ packages:
     description:
       path: "."
       ref: HEAD
-      resolved-ref: f48dc0555b1a28ed3c51215f3a93403dbbc46ea0
+      resolved-ref: "9c25c6bff76c554e5220368536fcb9370758f48f"
       url: "https://github.com/flutter-news-app-full-source-code/auth-inmemory.git"
     source: git
     version: "0.0.0"
@@ -178,7 +178,7 @@ packages:
     description:
       path: "."
       ref: HEAD
-      resolved-ref: "7a1b54f8c0f94f6c04af3404c8110181e080b5c4"
+      resolved-ref: f648500814ec636a2930498756029d29b363194a
       url: "https://github.com/flutter-news-app-full-source-code/core.git"
     source: git
     version: "0.0.0"
@@ -426,10 +426,10 @@ packages:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: c489908a54ce2131f1d1b7cc631af9c1a06fac5ca7c449e959192089f9489431
+      sha256: "8b1f37dfaf6e958c6b872322db06f946509433bec3de753c3491a42ae9ec2b48"
       url: "https://pub.dev"
     source: hosted
-    version: "16.0.0"
+    version: "16.1.0"
   google_fonts:
     dependency: "direct main"
     description: