AI助手优化-头像和对话功能

lib/pages/mine/mine_page.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:image_picker/image_picker.dart';
 
+import '../../api/auth_api.dart';
 import '../../core/module/app_module.dart';
 import '../../core/network/api_exception.dart';
 import '../../core/network/auth_redirect.dart';
@@ -12,6 +14,7 @@ import '../../providers/budget_provider.dart';
 import '../../utils/amount_input_formatter.dart';
 import '../../utils/amount_util.dart';
 import '../../utils/toast.dart';
+import '../../widgets/avatar.dart';
 import '../../widgets/cute_icon.dart';
 import '../../widgets/state_views.dart';
 
@@ -47,7 +50,7 @@ class MinePage extends ConsumerWidget {
               physics: const AlwaysScrollableScrollPhysics(),
               padding: const EdgeInsets.all(16),
               children: [
-                _userCard(user?.nickname ?? '用户', user?.username ?? '-'),
+                _userCard(context, ref, user?.nickname ?? '用户', user?.username ?? '-'),
                 const SizedBox(height: 14),
                 _accountCard(context, ref, accountAsync),
                 const SizedBox(height: 14),
@@ -78,7 +81,9 @@ class MinePage extends ConsumerWidget {
       future.then<void>((_) {}, onError: (_, _) {});
 
   // ---------------- 用户信息 ----------------
-  Widget _userCard(String nickname, String username) {
+  Widget _userCard(BuildContext context, WidgetRef ref, String nickname, String username) {
+    final avatar = ref.watch(authProvider).user?.avatar;
+
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 24),
       decoration: BoxDecoration(
@@ -97,12 +102,15 @@ class MinePage extends ConsumerWidget {
       ),
       child: Row(
         children: [
-          Container(
-            width: 60,
-            height: 60,
-            decoration: const BoxDecoration(shape: BoxShape.circle, color: Colors.white),
-            alignment: Alignment.center,
-            child: const CuteIcon('user', size: 32),
+          // 头像。点它换 —— 这是全 App 唯一的用户头像，聊天气泡用的也是它
+          GestureDetector(
+            onTap: () => _pickAvatar(context, ref),
+            child: Avatar(
+              assetPath: avatar,
+              size: 60,
+              fallbackIcon: 'user',
+              backgroundColor: Colors.white,
+            ),
           ),
           const SizedBox(width: 16),
           Expanded(
@@ -125,11 +133,65 @@ class MinePage extends ConsumerWidget {
               ],
             ),
           ),
+          // 提示这个区域可点，不然没人知道能换头像
+          const Icon(Icons.chevron_right, size: 20, color: Color(0xFF6D4C41)),
         ],
       ),
     );
   }
 
+  /// 换头像：选图 → 上传 → 更新资料 → 刷新本地用户信息
+  Future<void> _pickAvatar(BuildContext context, WidgetRef ref) async {
+    final source = await showModalBottomSheet<ImageSource>(
+      context: context,
+      backgroundColor: Colors.white,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
+      ),
+      builder: (sheetContext) => SafeArea(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            ListTile(
+              leading: const Icon(Icons.photo_camera_outlined, color: Color(0xFFC8956E)),
+              title: const Text('拍一张', style: TextStyle(fontSize: 14.5)),
+              onTap: () => Navigator.of(sheetContext).pop(ImageSource.camera),
+            ),
+            ListTile(
+              leading: const Icon(Icons.photo_library_outlined, color: Color(0xFFC8956E)),
+              title: const Text('从相册选', style: TextStyle(fontSize: 14.5)),
+              onTap: () => Navigator.of(sheetContext).pop(ImageSource.gallery),
+            ),
+            const SizedBox(height: 8),
+          ],
+        ),
+      ),
+    );
+    if (source == null || !context.mounted) return;
+
+    final api = ref.read(authApiProvider);
+    try {
+      final picked = await ImagePicker().pickImage(
+        source: source,
+        imageQuality: 80,
+        maxWidth: 800,
+      );
+      if (picked == null || !context.mounted) return;
+
+      // 上传拿路径，再提交资料 —— 两步是为了「传了但没保存」不留下记录
+      final path = await api.uploadAvatar(picked.path);
+      final res = await api.updateProfile(avatar: path);
+      if (!context.mounted) return;
+
+      await ref.read(authProvider.notifier).updateUserFromResponse(res);
+      if (context.mounted) showToast(context, '头像已更新', icon: 'check');
+    } on ApiException catch (e) {
+      if (context.mounted) showToast(context, e.message, error: true);
+    } catch (e) {
+      if (context.mounted) showToast(context, '换头像失败：$e', error: true);
+    }
+  }
+
   // ---------------- 账户卡 ----------------
   Widget _accountCard(BuildContext context, WidgetRef ref, AsyncValue<AccountInfo> accountAsync) {
     return Container(