fix: 修复头像审核旧图裂开问题 + CSP 配置修复

- 头像提交审核不再删除旧文件，审核通过后才删除旧头像文件
- 头像审核被拒时删除已上传的新头像文件，保留旧头像
- CSP style-src 移除 nonce 以启用 unsafe-inline（JS 动态样式需要）
- CSP script-src 移除 nonce 改用 unsafe-inline + unsafe-eval（Vditor 编辑器和动态样式需要）

internal/middleware/security.go

@@ -32,8 +32,8 @@ func SecurityHeaders() gin.HandlerFunc {
 		// img-src: 本站 + data: URI（头像裁切）+ blob:（粘贴图片）
 		c.Header("Content-Security-Policy",
 			"default-src 'self'; "+
-				"script-src 'self' 'nonce-"+nonce+"'; "+
+				"script-src 'self' 'unsafe-inline' 'unsafe-eval'; "+
-				"style-src 'self' 'nonce-"+nonce+"'; "+
+				"style-src 'self' 'unsafe-inline'; "+
 				"img-src 'self' data: blob:; "+
 				"connect-src 'self'")
 

internal/router/deps_extra.go

@@ -38,6 +38,7 @@ func buildDeps(db *gorm.DB, cfg *config.Config, siteSettings *config.SiteSetting
 
 	auditService := service.NewAuditService(auditRepo, userRepo, siteSettings, cfg.Audit, notificationService, levelSvc)
 	auditService.WithEnergyRefundService(energyService)
+	auditService.WithAvatarFileCleaner(avatarSvc)
 	auditController := adminCtrl.NewAuditController(auditService, userRepo)
 
 	messageController := controller.NewMessageController(notificationService)

internal/service/audit_review.go

@@ -67,6 +67,11 @@ func (s *AuditService) review(reviewerID uint, submissionID uint, approved bool,
 			}
 			s.notifier.NotifyAuditRejected(submission.UserID, submission.AuditType, reasonMsg, submission.ID)
 		}
+
+		// 头像审核被拒 → 删除提交的新头像文件
+		if submission.AuditType == model.AuditTypeAvatar && s.avatarCleaner != nil {
+			_ = s.avatarCleaner.DeleteAvatarFile(submission.NewValue)
+		}
 	}
 	return s.auditRepo.Update(submission)
 }
@@ -90,7 +95,16 @@ func (s *AuditService) applyApproval(submission *model.AuditSubmission) error {
 		}
 		user.Username = submission.NewValue
 	case model.AuditTypeAvatar:
+		oldAvatar := user.Avatar
 		user.Avatar = submission.NewValue
+		if err := s.userRepo.Update(user); err != nil {
+			return err
+		}
+		// 审核通过，删除旧头像文件
+		if s.avatarCleaner != nil {
+			_ = s.avatarCleaner.DeleteAvatarFile(oldAvatar)
+		}
+		return nil
 	case model.AuditTypeBio:
 		user.Bio = submission.NewValue
 	}

internal/service/audit_service.go

@@ -48,6 +48,12 @@ type energyRenameRefunder interface {
 	RefundOnRenameReject(userID uint) error
 }
 
+// avatarFileCleaner 头像审核通过/拒绝时清理头像文件的接口（ISP）
+type avatarFileCleaner interface {
+	CleanOldAvatars(userID uint)
+	DeleteAvatarFile(url string) error
+}
+
 // AuditService 审核业务逻辑
 type AuditService struct {
 	auditRepo        auditRepo
@@ -57,6 +63,7 @@ type AuditService struct {
 	notifier         auditNotifier
 	levelSvc         auditTaskCompleter
 	energyRefundSvc  energyRenameRefunder
+	avatarCleaner    avatarFileCleaner
 }
 
 // NewAuditService 构造函数
@@ -77,6 +84,12 @@ func (s *AuditService) WithEnergyRefundService(svc energyRenameRefunder) *AuditS
 	return s
 }
 
+// WithAvatarFileCleaner 链式注入头像文件清理服务
+func (s *AuditService) WithAvatarFileCleaner(svc avatarFileCleaner) *AuditService {
+	s.avatarCleaner = svc
+	return s
+}
+
 // ShouldAudit 判断指定用户是否需要走审核流程
 // 规则：admin 及以上角色免审
 func (s *AuditService) ShouldAudit(userID uint) (bool, error) {

internal/service/avatar_service.go

@@ -57,6 +57,9 @@ func (s *AvatarService) ProcessAvatar(userID uint, file io.Reader, contentType s
 		return "", err
 	}
 
+	// 直接更新场景：删除旧头像文件，仅保留新文件
+	s.CleanOldAvatars(userID)
+
 	user, err := s.userRepo.FindByID(userID)
 	if err != nil {
 		return "", fmt.Errorf("用户不存在")
@@ -134,10 +137,8 @@ func (s *AvatarService) ProcessImage(userID uint, file io.Reader, contentType st
 		return "", fmt.Errorf("创建存储目录失败")
 	}
 
-	// 8. 删除该用户的旧头像，仅保留最新
+	// 8. 原子写入：先写临时文件，再 rename 到最终路径
-	s.cleanOldAvatars(userID)
+	// 注意：此处不删除旧头像文件，审核场景下审核通过前旧头像仍需正常显示
-
-	// 9. 原子写入：先写临时文件，再 rename 到最终路径
 	ts := time.Now().Unix()
 	filename := fmt.Sprintf("%d_%d.webp", userID, ts)
 	tmpPath := filepath.Join(s.storageDir, filename+".tmp")
@@ -153,8 +154,8 @@ func (s *AvatarService) ProcessImage(userID uint, file io.Reader, contentType st
 	return fmt.Sprintf("/uploads/avatars/%d_%d.webp", userID, ts), nil
 }
 
-// cleanOldAvatars 删除指定用户的所有旧头像文件（仅保留最新一次上传）
+// CleanOldAvatars 删除指定用户的所有旧头像文件，调用方负责确保新文件不受影响
-func (s *AvatarService) cleanOldAvatars(userID uint) {
+func (s *AvatarService) CleanOldAvatars(userID uint) {
 	prefix := strconv.FormatUint(uint64(userID), 10) + "_"
 	entries, err := os.ReadDir(s.storageDir)
 	if err != nil {
@@ -167,6 +168,19 @@ func (s *AvatarService) cleanOldAvatars(userID uint) {
 	}
 }
 
+// DeleteAvatarFile 根据头像 URL 删除对应的磁盘文件
+func (s *AvatarService) DeleteAvatarFile(url string) error {
+	if url == "" {
+		return nil
+	}
+	filename := filepath.Base(url)
+	if filename == "." || filename == "/" {
+		return nil
+	}
+	fullPath := filepath.Join(s.storageDir, filename)
+	return os.Remove(fullPath)
+}
+
 // subImage 从原图中裁切指定正方形区域
 func subImage(img image.Image, x, y, size int) image.Image {
 	cropped := image.NewNRGBA(image.Rect(0, 0, size, size))