修复白屏BUG、UI 边界溢出 BUG

lib/features/home/presentation/widgets/profile_card.dart

@@ -1,12 +1,10 @@
-import 'dart:io';
-
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import 'package:arcx/app/app_theme.dart';
-import 'package:arcx/core/constants/app_defaults.dart';
 import 'package:arcx/data/local/models/models.dart';
 import 'package:arcx/features/profile/application/profile_controller.dart';
+import 'package:arcx/features/profile/presentation/avatar_image.dart';
 
 class ProfileCard extends ConsumerWidget {
   const ProfileCard({super.key, required this.onEdit});
@@ -65,17 +63,10 @@ class _Avatar extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final source = profile.avatarSource;
-    final image =
-        source == AvatarSource.localFile &&
-            profile.avatarLocalPath != null &&
-            profile.avatarLocalPath!.isNotEmpty
-        ? FileImage(File(profile.avatarLocalPath!))
-        : const AssetImage(AppDefaults.defaultAvatarAssetPath);
     return CircleAvatar(
       radius: 30,
       backgroundColor: AppTheme.surfaceMuted,
-      backgroundImage: image as ImageProvider,
+      backgroundImage: resolveAvatarImage(profile),
     );
   }
 }