补齐论坛核心能力：讨论锁定、发帖本地草稿、标签精确筛选，以及私信与通知分流。

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

router/router.go

@@ -151,6 +151,8 @@ func Setup(cfg *config.Config) (*gin.Engine, error) {
 		api.POST("/posts/:id/resolve", h.APISetQuestionResolved)
 		api.POST("/posts/:id/report", middleware.RateLimitMiddleware(limiter, "report"), h.APICreatePostReport)
 		api.GET("/messages/unread-count", h.APIMessageUnreadCount)
+		api.GET("/messages/notifications", h.APIMessageNotifications)
+		api.POST("/messages/notifications/read", h.APIMarkNotificationsRead)
 		api.GET("/messages/conversations", h.APIMessageConversations)
 		api.GET("/messages/conversations/:peerId", h.APIConversationMessages)
 		api.POST("/messages/conversations/:peerId/read", h.APIMarkConversationRead)
@@ -197,6 +199,7 @@ func Setup(cfg *config.Config) (*gin.Engine, error) {
 		adminAPI.POST("/posts/:id/board-pin", h.APIAdminBoardPinPost)
 		adminAPI.POST("/posts/:id/feature", h.APIAdminFeaturePost)
 		adminAPI.POST("/posts/:id/lock", h.APIAdminLockPost)
+		adminAPI.POST("/posts/:id/comments-lock", h.APIAdminCommentsLockPost)
 		adminAPI.POST("/posts/:id/approve", h.APIAdminApprovePost)
 		adminAPI.POST("/posts/:id/reject", h.APIAdminRejectPost)
 		adminAPI.POST("/posts/:id/restore", h.APIAdminRestorePost)