feat: 增加自定义头像上传、自动压缩与自动清理功能，统一全站头像路径读取逻辑

app/Http/Controllers/UserController.php

@@ -170,6 +170,10 @@ class UserController extends Controller
             \Illuminate\Support\Facades\Cache::forget($codeKey);
         }
 
+        if (isset($data['headface']) && $data['headface'] !== $user->headface) {
+            $user->deleteCustomAvatar();
+        }
+
         $user->update($data);
 
         return response()->json(['status' => 'success', 'message' => '资料更新成功。']);