Added Notification Bridge.

Added an onboarding screen.
Fixed problem wherebottom bar blocked sending message.
added a option to go to instagram's settings page in our settings page.
added a notifications icon in bottombar.
Other few Improvements and Bug fixes.

lib/main.dart

@@ -3,6 +3,7 @@ import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 import 'services/session_manager.dart';
 import 'services/settings_service.dart';
+import 'screens/onboarding_page.dart';
 import 'screens/main_webview_page.dart';
 import 'screens/breath_gate_screen.dart';
 import 'screens/app_session_picker.dart';
@@ -59,10 +60,11 @@ class FocusGramApp extends StatelessWidget {
 }
 
 /// Flow on every cold open:
-///   1. Cooldown Gate (if app-open cooldown active)
-///   2. Breath Gate (if enabled in settings)
-///   3. App Session Picker (always)
-///   4. Main WebView
+///   1. Onboarding (if first run)
+///   2. Cooldown Gate (if app-open cooldown active)
+///   3. Breath Gate (if enabled in settings)
+///   4. App Session Picker (always)
+///   5. Main WebView
 class InitialRouteHandler extends StatefulWidget {
   const InitialRouteHandler({super.key});
 
@@ -73,32 +75,40 @@ class InitialRouteHandler extends StatefulWidget {
 class _InitialRouteHandlerState extends State<InitialRouteHandler> {
   bool _breathCompleted = false;
   bool _appSessionStarted = false;
+  bool _onboardingCompleted = false;
 
   @override
   Widget build(BuildContext context) {
     final sm = context.watch<SessionManager>();
     final settings = context.watch<SettingsService>();
 
-    // Step 1: Cooldown gate — if too soon since last session
+    // Step 1: Onboarding
+    if (settings.isFirstRun && !_onboardingCompleted) {
+      return OnboardingPage(
+        onFinish: () => setState(() => _onboardingCompleted = true),
+      );
+    }
+
+    // Step 2: Cooldown gate — if too soon since last session
     if (sm.isAppOpenCooldownActive) {
       return const CooldownGateScreen();
     }
 
-    // Step 2: Breath gate
+    // Step 3: Breath gate
     if (settings.showBreathGate && !_breathCompleted) {
       return BreathGateScreen(
         onFinish: () => setState(() => _breathCompleted = true),
       );
     }
 
-    // Step 3: App session picker
+    // Step 4: App session picker
     if (!_appSessionStarted) {
       return AppSessionPickerScreen(
         onSessionStarted: () => setState(() => _appSessionStarted = true),
       );
     }
 
-    // Step 4: Main app
+    // Step 5: Main app
     return const MainWebViewPage();
   }
 }