feat(orders): 号主可从自己的列表隐藏已结束订单

只写入隐藏时间，订单和款项仍保留给租客与后台。详情按钮固定对齐，删除跟在后面。

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

backend/internal/router/router.go

@@ -529,6 +529,7 @@ func New(cfg config.Config, deps Dependencies, logger *zap.Logger) *gin.Engine {
 			orderRoutes.POST("/:id/start-payment", paymentHandler.Start)
 			orderRoutes.GET("/:id/query-payment", paymentHandler.Query)
 			orderRoutes.POST("/:id/cancel", orderHandler.Cancel)
+			orderRoutes.POST("/:id/hide", orderHandler.HideForOwner)
 			orderRoutes.POST("/:id/handoff", orderHandler.SubmitHandoff)
 			orderRoutes.GET("/:id/handoff-records", orderHandler.HandoffRecords)
 			orderRoutes.POST("/:id/confirm-receive", orderHandler.ConfirmReceive)