优化配送订单收货地址联动显示

frontend/platform_admin/src/views/resource/use-resource-relations.ts

@@ -183,6 +183,15 @@ export function useResourceRelations(
     timers.delete(resource);
   }
 
+  /** 清空依赖父级但当前尚无有效父级的候选项。 */
+  function clear(resource: string | undefined) {
+    if (!resource) return;
+    cancelSearch(resource);
+    requestGuard.begin(resource);
+    options[resource] = [];
+    loading[resource] = false;
+  }
+
   onBeforeUnmount(() => {
     for (const resource of timers.keys()) cancelSearch(resource);
   });
@@ -198,6 +207,7 @@ export function useResourceRelations(
     search,
     searchField,
     cancelSearch,
+    clear,
   };
 }