feat: 用户徽章与等级体系，积分经济管理重构

- 新增徽章系统：badge 服务与 handler、管理端配置页、BadgeChip/LevelBadge 展示组件
- 新增等级模型：model/level 及前端 levels 元数据
- 管理端经济模块拆分为 points/badges/levels 独立页面，EconomySettings 迁入设置
- 积分、签到、评论等服务适配等级与徽章逻辑

backend/service/post.go

@@ -242,7 +242,7 @@ func (s *PostService) List(q PostListQuery) ([]PostListItem, int64, error) {
 		order = "pinned DESC, created_at DESC"
 	}
 	if err := query.Order(order).Offset(offset).Limit(q.Size).
-		Preload("Board").Preload("User").Find(&posts).Error; err != nil {
+		Preload("Board").Preload("User").Preload("User.Badges.Badge").Find(&posts).Error; err != nil {
 		return nil, 0, err
 	}
 
@@ -278,7 +278,7 @@ func (s *PostService) ListByUser(userID, viewerID uint, actor *Actor, page, size
 	var posts []model.Post
 	offset := (page - 1) * size
 	if err := query.Order("pinned DESC, created_at DESC").Offset(offset).Limit(size).
-		Preload("Board").Preload("User").Find(&posts).Error; err != nil {
+		Preload("Board").Preload("User").Preload("User.Badges.Badge").Find(&posts).Error; err != nil {
 		return nil, 0, err
 	}
 	items := toPostListItems(posts)
@@ -330,8 +330,8 @@ func (s *PostService) TogglePin(id uint) (int, error) {
 	return newPinned, nil
 }
 
-// ToggleRecommend 切换推荐状态（仅管理员可操作，由 handler 校验权限）
-func (s *PostService) ToggleRecommend(id uint) (bool, error) {
+// ToggleRecommend 切换帖子加精；加精时向作者发放可配置的推荐奖励（每帖仅一次，自荐不发）
+func (s *PostService) ToggleRecommend(id, operatorID uint) (bool, error) {
 	var post model.Post
 	if err := s.db.First(&post, id).Error; err != nil {
 		return false, err
@@ -341,9 +341,38 @@ func (s *PostService) ToggleRecommend(id uint) (bool, error) {
 	if result.Error != nil {
 		return false, result.Error
 	}
+	if newVal && operatorID != post.UserID {
+		s.grantRecommendReward(post)
+	}
 	return newVal, nil
 }
 
+// grantRecommendReward 发放推荐奖励（非关键路径，失败仅记日志不阻断）
+func (s *PostService) grantRecommendReward(post model.Post) {
+	if s.setting == nil {
+		return
+	}
+	rules, err := s.setting.PointsRules()
+	if err != nil || rules.RecommendReward <= 0 {
+		return
+	}
+	_ = s.db.Transaction(func(tx *gorm.DB) error {
+		// 每帖仅一次：已存在同 reason/ref 的正入账则跳过（防止反复 toggle 重复加分）
+		var used int64
+		if err := tx.Model(&model.PointLedger{}).
+			Where("user_id = ? AND reason = ? AND ref_type = ? AND ref_id = ? AND delta > 0",
+				post.UserID, model.PointReasonRecommend, "post", post.ID).
+			Count(&used).Error; err != nil {
+			return err
+		}
+		if used > 0 {
+			return nil
+		}
+		RewardIfConfigured(tx, post.UserID, rules.RecommendReward, 0, model.PointReasonRecommend, "post", post.ID, "帖子被推荐")
+		return nil
+	})
+}
+
 // visibleTo 非已发布帖子仅作者本人或对该板块有审核权的管理成员可见。
 // loadActor 为懒加载回调：仅访问非已发布帖且访问者非作者时才触发，避免常规浏览多查 DB
 func visibleToPost(post *model.Post, viewerID uint, loadActor func() *Actor) bool {
@@ -437,13 +466,13 @@ type UpdatePostInput struct {
 // 已软删帖返回 tombstone（无正文/附件）；已硬删或不存在返回 ErrPostNotFound。
 func (s *PostService) GetByIDForViewer(id, viewerID uint, loadActor func() *Actor, pwdUnlocked map[int]bool) (*PostDetail, error) {
 	var post model.Post
-	err := s.db.Preload("Board").Preload("User").First(&post, id).Error
+	err := s.db.Preload("Board").Preload("User").Preload("User.Badges.Badge").First(&post, id).Error
 	if err != nil {
 		if !errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, ErrPostNotFound
 		}
 		// 默认 scope 找不到：尝试软删行 → tombstone
-		if err := s.db.Unscoped().Preload("Board").Preload("User").First(&post, id).Error; err != nil {
+		if err := s.db.Unscoped().Preload("Board").Preload("User").Preload("User.Badges.Badge").First(&post, id).Error; err != nil {
 			return nil, ErrPostNotFound
 		}
 		if !post.DeletedAt.Valid {
@@ -655,7 +684,7 @@ func (s *PostService) UnlockByPassword(postID uint, password string) (matched []
 // UnlockContent 积分解锁正文隐藏块（一次支付解锁本帖全部积分块）
 func (s *PostService) UnlockContent(userID, postID uint) (*PostDetail, error) {
 	var post model.Post
-	if err := s.db.Preload("Board").Preload("User").First(&post, postID).Error; err != nil {
+	if err := s.db.Preload("Board").Preload("User").Preload("User.Badges.Badge").First(&post, postID).Error; err != nil {
 		return nil, ErrPostNotFound
 	}
 	derived, derr := markdown.DeriveAccessFromContent(post.Content)
@@ -834,6 +863,14 @@ func (s *PostService) Create(in CreatePostInput) (*PostDetail, error) {
 				return err
 			}
 		}
+		// 发帖奖励（可配置；仅公开发布发奖，待审不发且过审不补发，防拒审刷分）
+		if status == model.ContentStatusPublished && s.setting != nil {
+			rules, err := s.setting.PointsRules()
+			if err == nil {
+				RewardIfConfigured(tx, in.UserID, rules.PostReward, rules.PostDailyCap,
+					model.PointReasonPostReward, "post", post.ID, "发帖奖励："+title)
+			}
+		}
 		if len(in.AttachmentIDs) == 0 {
 			return nil
 		}
@@ -855,7 +892,7 @@ func (s *PostService) Create(in CreatePostInput) (*PostDetail, error) {
 	if err != nil {
 		return nil, err
 	}
-	s.db.Preload("Board").Preload("User").First(post, post.ID)
+	s.db.Preload("Board").Preload("User").Preload("User.Badges.Badge").First(post, post.ID)
 	detail := buildPostDetail(post)
 	atts, _ := s.listAttachmentDTOs(post.ID, in.UserID, post.UserID)
 	detail.Attachments = atts
@@ -1040,7 +1077,7 @@ func (s *PostService) Update(actor *Actor, postID, userID uint, in UpdatePostInp
 	if err != nil {
 		return nil, err
 	}
-	s.db.Preload("Board").Preload("User").First(&post, post.ID)
+	s.db.Preload("Board").Preload("User").Preload("User.Badges.Badge").First(&post, post.ID)
 	detail := buildPostDetail(&post)
 	atts, _ := s.listAttachmentDTOs(post.ID, userID, post.UserID)
 	detail.Attachments = atts