feat: implement profile screen with user info, stats, and logout

lib/features/profile/presentation/profile_screen.dart

@@ -1,24 +1,146 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
 import '../../../app/router/route_names.dart';
-import '../../../shared/widgets/feature_placeholder.dart';
+import '../../auth/providers/auth_provider.dart';
+import '../../bookshelf/providers/bookshelf_provider.dart';
 
-class ProfileScreen extends StatelessWidget {
+class ProfileScreen extends ConsumerWidget {
   const ProfileScreen({super.key});
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final authState = ref.watch(authProvider);
+    final bookshelfAsync = ref.watch(bookshelfProvider);
+
     return Scaffold(
-      appBar: AppBar(title: const Text('Tai khoan')),
-      body: FeaturePlaceholder(
-        title: 'User Profile',
-        description:
-            'Khung profile user, thong tin session, thong ke bookmark/de cu va cac cai dat doc dong bo.',
-        actions: [
-          FilledButton(
-            onPressed: () => context.push(RouteNames.settings),
-            child: const Text('Mo cai dat doc'),
+      appBar: AppBar(title: const Text('Tài khoản')),
+      body: authState.maybeWhen(
+        authenticated: (user) => SingleChildScrollView(
+          padding: const EdgeInsets.all(16),
+          child: Column(
+            children: [
+              // User Avatar & Basic Info
+              Container(
+                padding: const EdgeInsets.all(20),
+                decoration: BoxDecoration(
+                  color: Theme.of(context).colorScheme.primaryContainer,
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                child: Column(
+                  children: [
+                    CircleAvatar(
+                      radius: 40,
+                      backgroundImage: user.image != null
+                          ? NetworkImage(user.image!)
+                          : null,
+                      child: user.image == null
+                          ? Text(
+                              user.name.isNotEmpty
+                                  ? user.name[0].toUpperCase()
+                                  : '?',
+                              style: Theme.of(context).textTheme.headlineMedium,
+                            )
+                          : null,
+                    ),
+                    const SizedBox(height: 12),
+                    Text(
+                      user.name,
+                      style: Theme.of(context).textTheme.titleLarge,
+                      textAlign: TextAlign.center,
+                    ),
+                    const SizedBox(height: 4),
+                    Text(
+                      user.email,
+                      style: Theme.of(context).textTheme.bodyMedium,
+                      textAlign: TextAlign.center,
+                    ),
+                  ],
+                ),
+              ),
+              const SizedBox(height: 24),
+
+              // Stats Cards
+              Row(
+                children: [
+                  Expanded(
+                    child: _buildStatCard(
+                      context: context,
+                      label: 'Sách Đánh Dấu',
+                      count: bookshelfAsync.whenData((b) => b.length).value ?? 0,
+                    ),
+                  ),
+                  const SizedBox(width: 12),
+                  Expanded(
+                    child: _buildStatCard(
+                      context: context,
+                      label: 'Đang Đọc',
+                      count: bookshelfAsync
+                              .whenData((b) => b.where((x) => true).length)
+                              .value ??
+                          0,
+                    ),
+                  ),
+                ],
+              ),
+              const SizedBox(height: 24),
+
+              // Settings Button
+              SizedBox(
+                width: double.infinity,
+                child: FilledButton.icon(
+                  onPressed: () => context.push(RouteNames.settings),
+                  icon: const Icon(Icons.tune),
+                  label: const Text('Cài Đặt Đọc'),
+                ),
+              ),
+              const SizedBox(height: 12),
+
+              // Logout Button
+              SizedBox(
+                width: double.infinity,
+                child: OutlinedButton.icon(
+                  onPressed: () async {
+                    await ref.read(authProvider.notifier).signOut();
+                    if (context.mounted) context.go(RouteNames.login);
+                  },
+                  icon: const Icon(Icons.logout),
+                  label: const Text('Đăng Xuất'),
+                ),
+              ),
+            ],
+          ),
+        ),
+        orElse: () => const Center(child: CircularProgressIndicator()),
+      ),
+    );
+  }
+
+  Widget _buildStatCard({
+    required BuildContext context,
+    required String label,
+    required int count,
+  }) {
+    return Container(
+      padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 12),
+      decoration: BoxDecoration(
+        color: Theme.of(context).colorScheme.surfaceContainer,
+        borderRadius: BorderRadius.circular(8),
+      ),
+      child: Column(
+        children: [
+          Text(
+            count.toString(),
+            style: Theme.of(context).textTheme.headlineMedium?.copyWith(
+                  color: Theme.of(context).colorScheme.primary,
+                ),
+          ),
+          const SizedBox(height: 4),
+          Text(
+            label,
+            style: Theme.of(context).textTheme.bodySmall,
+            textAlign: TextAlign.center,
           ),
         ],
       ),