feat(admin-backend): add user avatar upload endpoint for admins

music-houduan/src/main/java/com/test/musichouduan/controller/UserController.java

@@ -207,6 +207,27 @@ public class UserController {
         return Result.success("更新成功", userDTO);
     }
 
+    /**
+     * 管理员上传指定用户头像
+     *
+     * @param id 用户ID
+     * @param file 头像文件
+     * @return 响应结果
+     */
+    @Operation(summary = "管理员上传用户头像", description = "管理员上传指定用户头像并更新用户信息，需要管理员权限")
+    @SaCheckRole("admin")
+    @PostMapping("/{id}/upload/avatar")
+    public Result<String> adminUploadUserAvatar(
+            @Parameter(description = "用户ID", example = "1") @PathVariable Long id,
+            @Parameter(description = "头像文件") @RequestParam("file") MultipartFile file) {
+        String avatarPhysicalPath = fileService.uploadImage(file);
+        String avatarUrl = avatarPhysicalPath.replace(System.getProperty("user.dir") + File.separator + "music-houduan", "").replace(File.separator, "/");
+
+        userService.adminUpdateUserAvatar(id, avatarUrl);
+
+        return Result.success("上传成功", avatarUrl);
+    }
+
     /**
      * 上传用户头像
      *

music-houduan/src/main/java/com/test/musichouduan/service/UserService.java

@@ -107,6 +107,15 @@ public interface UserService {
      */
     UserDTO adminUpdateUser(Long id, UserUpdateRequest request);
 
+    /**
+     * 管理员上传并更新指定用户头像
+     *
+     * @param id 用户ID
+     * @param avatar 头像地址
+     * @return 用户DTO
+     */
+    UserDTO adminUpdateUserAvatar(Long id, String avatar);
+
     /**
      * 根据ID获取用户实体
      *

music-houduan/src/main/java/com/test/musichouduan/service/impl/FileServiceImpl.java

@@ -48,9 +48,9 @@ public class FileServiceImpl implements FileService {
         // 检查文件类型
         String originalFilename = file.getOriginalFilename();
         String extension = getFileExtension(originalFilename);
-        List<String> imageTypes = Arrays.asList("jpg", "jpeg", "png", "gif");
+        List<String> imageTypes = Arrays.asList("jpg", "jpeg", "png", "gif", "webp");
         if (!imageTypes.contains(extension.toLowerCase())) {
-            throw new BusinessException("只能上传jpg、jpeg、png、gif格式的图片");
+            throw new BusinessException("只能上传jpg、jpeg、png、gif、webp格式的图片");
         }
 
         // 上传文件

music-houduan/src/main/java/com/test/musichouduan/service/impl/UserServiceImpl.java

@@ -329,6 +329,15 @@ public class UserServiceImpl implements UserService {
         return convertToDTO(savedUser);
     }
 
+    @Override
+    @Transactional
+    public UserDTO adminUpdateUserAvatar(Long id, String avatar) {
+        User user = getById(id);
+        user.setAvatar(avatar);
+        User savedUser = userRepository.save(user);
+        return convertToDTO(savedUser);
+    }
+
     @Override
     public User getById(Long id) {
         return userRepository.findById(id)