feat: add back navigation to agent network screen and update route transition animation

lib/core/widgets/app_shell.dart

@@ -21,14 +21,57 @@ class _AppShellState extends State<AppShell> {
     super.initState();
     // Wire push notification taps to GoRouter navigation
     PushNotificationService().onNotificationTap = (actionUrl) {
-      if (mounted && actionUrl != null && actionUrl.isNotEmpty) {
-        context.go(actionUrl);
-      } else if (mounted) {
+      if (!mounted) return;
+      if (actionUrl == null || actionUrl.isEmpty) {
         context.go('/notifications');
+        return;
       }
+      // Translate web routes to mobile routes
+      final mobileRoute = _translateRoute(actionUrl);
+      context.go(mobileRoute);
     };
   }
 
+  /// Translate web-style actionUrl to mobile route.
+  String _translateRoute(String url) {
+    final uri = Uri.parse(url);
+    final path = uri.path;
+
+    // Message notification: /user/message?conversationId=xxx or /agent/message?conversationId=xxx
+    if (path.contains('/message')) {
+      final convId = uri.queryParameters['conversationId'];
+      if (convId != null && convId.isNotEmpty) {
+        return '/messages/chat/$convId';
+      }
+      return '/messages';
+    }
+
+    // Connection request/network
+    if (path.contains('/network')) {
+      // Agent sees network, user sees agent search
+      if (path.startsWith('/agent')) {
+        return '/agent/network';
+      }
+      return '/agents/search';
+    }
+
+    // Profile routes
+    if (path.contains('/profiles') || path.contains('/profile')) {
+      return '/home';
+    }
+
+    // If it's already a valid mobile route, use as-is
+    if (path.startsWith('/messages') ||
+        path.startsWith('/home') ||
+        path.startsWith('/notifications') ||
+        path.startsWith('/agents')) {
+      return path;
+    }
+
+    // Fallback
+    return '/notifications';
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(