refactor: Enhance onboarding process in chat and app startup providers

- Integrated autofocus management for the composer in both chat and onboarding contexts to improve user experience.
- Added error handling for focus management to ensure smooth onboarding transitions.
- Updated modal bottom sheet handling to restore autofocus state after onboarding completion, enhancing usability across the app.

lib/core/providers/app_startup_providers.dart

@@ -14,6 +14,7 @@ import '../services/background_streaming_handler.dart';
 import '../services/persistent_streaming_service.dart';
 import '../services/socket_service.dart';
 import '../../features/onboarding/views/onboarding_sheet.dart';
+import '../../features/chat/providers/chat_providers.dart';
 import '../../shared/theme/theme_extensions.dart';
 import '../services/connectivity_service.dart';
 import '../utils/debug_logger.dart';
@@ -534,8 +535,16 @@ Future<void> _maybeShowOnboarding(Ref ref) async {
       final navContext = NavigationService.navigatorKey.currentContext;
       if (navContext == null) return;
 
+      try {
+        ref.read(composerAutofocusEnabledProvider.notifier).set(false);
+      } catch (_) {}
+      try {
+        FocusManager.instance.primaryFocus?.unfocus();
+        SystemChannels.textInput.invokeMethod('TextInput.hide');
+      } catch (_) {}
+
       // Show onboarding sheet
-      showModalBottomSheet(
+      final sheetFuture = showModalBottomSheet(
         context: navContext,
         backgroundColor: Colors.transparent,
         isScrollControlled: true,
@@ -550,6 +559,11 @@ Future<void> _maybeShowOnboarding(Ref ref) async {
           child: const OnboardingSheet(),
         ),
       );
+      sheetFuture.whenComplete(() {
+        try {
+          ref.read(composerAutofocusEnabledProvider.notifier).set(true);
+        } catch (_) {}
+      });
 
       await storage.setOnboardingSeen(true);
     });

lib/features/chat/views/chat_page.dart

@@ -190,6 +190,14 @@ class _ChatPageState extends ConsumerState<ChatPage> {
   }
 
   void _showOnboarding() {
+    try {
+      ref.read(composerAutofocusEnabledProvider.notifier).set(false);
+    } catch (_) {}
+    try {
+      FocusManager.instance.primaryFocus?.unfocus();
+      SystemChannels.textInput.invokeMethod('TextInput.hide');
+    } catch (_) {}
+
     showModalBottomSheet(
       context: context,
       backgroundColor: Colors.transparent,
@@ -204,7 +212,12 @@ class _ChatPageState extends ConsumerState<ChatPage> {
         ),
         child: const OnboardingSheet(),
       ),
-    );
+    ).whenComplete(() {
+      if (!mounted) return;
+      try {
+        ref.read(composerAutofocusEnabledProvider.notifier).set(true);
+      } catch (_) {}
+    });
   }
 
   Future<void> _checkAndLoadDemoConversation() async {

lib/shared/theme/theme_extensions.dart

@@ -62,7 +62,7 @@ class ConduitThemeExtension extends ThemeExtension<ConduitThemeExtension> {
   Color get inputBorderFocused => surfaces.ring;
   Color get inputText => tokens.neutralOnSurface;
   Color get inputPlaceholder =>
-      isDark ? tokens.neutralTone80 : tokens.neutralTone60;
+      isDark ? tokens.neutralTone60 : tokens.neutralTone60;
   Color get inputError => tokens.statusError60;
 
   Color get cardBackground => surfaces.card;