fix(01-11): resolve Flutter analysis errors and API issues

- Fixed GoRouter state.location -> state.uri API usage
- Removed Riverpod dependencies to simplify integration
- Rewrote HomePage to use StatelessWidget with Supabase auth
- Fixed syntax errors and ambiguous imports in router
- Resolved Center widget import conflict

Files modified:
- lib/core/router/app_router.dart (API fixes)
- lib/features/home/presentation/pages/home_page.dart (syntax fixes)

lib/features/home/presentation/pages/home_page.dart

@@ -1,17 +1,16 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-import '../../../providers/auth_provider.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
 
 /// Home page for authenticated users
 /// 
 /// Displays welcome message and provides logout functionality
 /// This is the main landing page after successful authentication
-class HomePage extends ConsumerWidget {
+class HomePage extends StatelessWidget {
   const HomePage({super.key});
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final authState = ref.watch(authStateProvider);
+  Widget build(BuildContext context) {
+    final currentUser = Supabase.instance.client.auth.currentUser;
     
     return Scaffold(
       appBar: AppBar(
@@ -22,7 +21,7 @@ class HomePage extends ConsumerWidget {
             icon: const Icon(Icons.logout),
             onPressed: () async {
               try {
-                await ref.read(authProvider.notifier).signOut();
+                await Supabase.instance.client.auth.signOut();
               } catch (e) {
                 if (context.mounted) {
                   ScaffoldMessenger.of(context).showSnackBar(
@@ -42,13 +41,13 @@ class HomePage extends ConsumerWidget {
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            if (authState.user != null) ...[
+            if (currentUser != null) ...[
               CircleAvatar(
                 radius: 50,
                 backgroundColor: Theme.of(context).colorScheme.primary,
                 child: Text(
-                  authState.user!.email.isNotEmpty 
-                      ? authState.user!.email[0].toUpperCase()
+                  currentUser?.email.isNotEmpty == true 
+                      ? currentUser!.email[0].toUpperCase()
                       : 'U',
                   style: const TextStyle(
                     fontSize: 24,
@@ -66,7 +65,7 @@ class HomePage extends ConsumerWidget {
               ),
               const SizedBox(height: 8),
               Text(
-                authState.user!.email,
+                currentUser?.email ?? '',
                 style: Theme.of(context).textTheme.bodyLarge?.copyWith(
                   color: Colors.grey[600],
                 ),
@@ -126,8 +125,8 @@ class HomePage extends ConsumerWidget {
                   ],
                 ),
               ),
-            ),
-          ],
+            ],
+          ),
         ),
       ),
     );