feat: 收藏夹系统 + Studio 趋势图 + 通知偏好设置

- 新增收藏夹系统 (Folder/FolderItem 模型、CRUD API、前端管理页)
- 新增文章详情页收藏按钮 (书签图标、ToggleFavorite 一键收藏)
- 新增 Studio 趋势图 (赋能值/评论/点赞/收藏 4 线图, 7d/30d/90d)
- 新增通知偏好设置页 (评论/回复/点赞/关注 4 类开关)
- 后端通知列表支持按偏好过滤 (排除已关闭的通知类型)
- 下载 Chart.js 到本地静态资源 (static/js/chart.umd.min.js)
- 补充收藏夹卡片、开关滑块、趋势图网格等 CSS 样式

internal/service/notification_service.go

@@ -1,6 +1,7 @@
 package service
 
 import (
+	"encoding/json"
 	"fmt"
 	"sort"
 
@@ -8,20 +9,45 @@ import (
 	"metazone.cc/metalab/internal/model"
 )
 
+// ParseNotifyPrefs 解析用户通知偏好 JSON 字符串
+func ParseNotifyPrefs(raw string) map[string]bool {
+	prefs := map[string]bool{
+		model.NotifyComment:        true,
+		model.NotifyCommentReply:   true,
+		model.NotifyLikeAggregated: true,
+		model.NotifyFollow:         true,
+	}
+	if raw == "" {
+		return prefs
+	}
+	var parsed map[string]bool
+	if err := json.Unmarshal([]byte(raw), &parsed); err != nil {
+		return prefs
+	}
+	for k, v := range parsed {
+		prefs[k] = v
+	}
+	return prefs
+}
+
 // notifRepo 通知服务所需的最小仓储接口（ISP）
 type notifRepo interface {
 	Create(n *model.Notification) error
 	ListByUser(userID uint, offset, limit int) ([]model.Notification, error)
 	ListByUserAndType(userID uint, notifyType string, offset, limit int) ([]model.Notification, error)
+	ListByUserExcludeTypes(userID uint, excludeTypes []string, offset, limit int) ([]model.Notification, error)
 	CountByUser(userID uint) (int64, error)
+	CountByUserExcludeTypes(userID uint, excludeTypes []string) (int64, error)
 	CountByUserAndType(userID uint, notifyType string) (int64, error)
 	CountUnread(userID uint) (int64, error)
+	CountUnreadExcludeTypes(userID uint, excludeTypes []string) (int64, error)
 	CountUnreadByType(userID uint, notifyType string) (int64, error)
 	MarkRead(id, userID uint) error
 	MarkAllRead(userID uint) error
 	GetUnnotifiedDailyLikeSummaries(userID uint) ([]model.DailyLikeSummary, error)
 	MarkDailyLikeSummaryNotified(id uint) error
 	GetUsernameByID(userID uint) (string, error)
+	GetNotifyPrefs(userID uint) (string, error)
 }
 
 // NotificationService 消息/通知业务逻辑
@@ -56,12 +82,14 @@ func (s *NotificationService) List(userID uint, page, pageSize int) (*model.Noti
 	p := common.Pagination{Page: page, PageSize: pageSize}
 	p.DefaultPagination()
 
-	total, err := s.repo.CountByUser(userID)
+	excludeTypes := s.getDisabledTypes(userID)
+
+	total, err := s.repo.CountByUserExcludeTypes(userID, excludeTypes)
 	if err != nil {
 		return nil, err
 	}
 
-	items, err := s.repo.ListByUser(userID, p.Offset(), p.PageSize)
+	items, err := s.repo.ListByUserExcludeTypes(userID, excludeTypes, p.Offset(), p.PageSize)
 	if err != nil {
 		return nil, err
 	}
@@ -198,9 +226,31 @@ func sortNotifications(items []model.Notification) {
 	})
 }
 
-// CountUnread 统计未读消息数
+// CountUnread 统计未读消息数（排除用户禁用的通知类型）
 func (s *NotificationService) CountUnread(userID uint) (int64, error) {
-	return s.repo.CountUnread(userID)
+	excludeTypes := s.getDisabledTypes(userID)
+	return s.repo.CountUnreadExcludeTypes(userID, excludeTypes)
+}
+
+// getDisabledTypes 获取用户禁用的通知类型列表
+func (s *NotificationService) getDisabledTypes(userID uint) []string {
+	raw, err := s.repo.GetNotifyPrefs(userID)
+	if err != nil || raw == "" {
+		return nil
+	}
+	prefs := ParseNotifyPrefs(raw)
+	var disabled []string
+	for _, t := range []string{
+		model.NotifyComment,
+		model.NotifyCommentReply,
+		model.NotifyLikeAggregated,
+		model.NotifyFollow,
+	} {
+		if !prefs[t] {
+			disabled = append(disabled, t)
+		}
+	}
+	return disabled
 }
 
 // MarkRead 标记单条消息为已读