feat(comments): 支持编辑与管理可见历史，采纳展示改用楼层号

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

backend/router/router.go

@@ -92,6 +92,8 @@ func Setup(cfg *config.Config) (*gin.Engine, error) {
 			Type: realtime.EventNotificationNew,
 		})
 	}
+	// 点赞通知延迟落库（冷却期内取消点赞则不通知）
+	service.StartLikeNotifyFlusher(notifSvc)
 
 	authMW := middleware.NewAuthMiddleware(authSvc)
 
@@ -150,6 +152,7 @@ func Setup(cfg *config.Config) (*gin.Engine, error) {
 		api.PUT("/posts/:id/recommend", h.ToggleRecommend)
 		api.POST("/posts/:id/like", h.ToggleLike)
 		api.POST("/posts/:id/comments", middleware.RateLimitMiddleware(limiter, service.RateComment), h.CreateComment)
+		api.PUT("/posts/:id/comments/:cid", middleware.RateLimitMiddleware(limiter, service.RateComment), h.UpdateComment)
 		api.DELETE("/posts/:id/comments/:cid", h.DeleteComment)
 		api.PUT("/posts/:id/comments/:cid/restore", h.RestoreComment)
 		api.DELETE("/posts/:id/comments/:cid/purge", h.PurgeComment)
@@ -217,6 +220,7 @@ func Setup(cfg *config.Config) (*gin.Engine, error) {
 		staffAPI.DELETE("/content/comments/:id", h.AdminSoftDeleteComment)
 		staffAPI.PUT("/content/comments/:id/restore", h.AdminRestoreComment)
 		staffAPI.DELETE("/content/comments/:id/purge", h.AdminPurgeComment)
+		staffAPI.GET("/content/comments/:id/history", h.AdminCommentHistory)
 
 		// 积分与类型帖概览（管理员及以上）
 		staffAPI.GET("/economy", authMW.RequirePerm(service.PermAnnouncements), h.AdminPointsStats)