feat(admin): 独立后台壳、站点分析与聊天监管，公开站拆出主题切换与访问埋点

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/service/admin_user.go

@@ -52,6 +52,7 @@ type AdminUserItem struct {
 	Banned       bool       `json:"banned"`
 	PostCount    int64      `json:"post_count"`
 	CommentCount int64      `json:"comment_count"`
+	Points       int        `json:"points"`
 	CreatedAt    time.Time  `json:"created_at"`
 	LastSeenAt   *time.Time `json:"last_seen_at"`
 	Online       bool       `json:"online"`
@@ -188,6 +189,7 @@ func (s *AdminUserService) toItems(users []model.User) []AdminUserItem {
 			Role:       string(u.Role),
 			BoardIDs:   []uint{},
 			Banned:     u.Banned,
+			Points:     u.Points,
 			CreatedAt:  u.CreatedAt,
 			LastSeenAt: u.LastSeenAt,
 		}