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/modules/order/handler_user.go

@@ -104,6 +104,23 @@ func (h *Handler) Cancel(c *gin.Context) {
 	response.OK(c, gin.H{"cancelled": true})
 }
 
+func (h *Handler) HideForOwner(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	id, ok := parseID(c)
+	if !ok {
+		return
+	}
+	if err := h.service.HideForOwner(c.Request.Context(), userID, id); err != nil {
+		writeOrderError(c, err)
+		return
+	}
+	response.OK(c, gin.H{"hidden": true})
+}
+
 func (h *Handler) Pay(c *gin.Context) {
 	userID, ok := currentUserID(c)
 	if !ok {