完善智能气阀新建归属选择

新建页面明确说明当前归属四选一，选择新归属时自动清空其他归属；字段改用业务名称并补充选择提示，同时扩展专项检查和中文文档。

frontend/platform_admin/src/views/resource/ResourceRecordPage.vue

@@ -116,6 +116,14 @@
           <div class="form-shell">基本信息</div>
         </template>
         <div class="form-shell form-content">
+          <a-alert
+            v-if="mode === 'create' && definition.name === 'product_info'"
+            class="workflow-alert"
+            type="warning"
+            show-icon
+          >
+            当前归属只能选择库房、气站、配送点或用户中的一个；选择新归属时会自动清空其他归属。
+          </a-alert>
           <a-form :model="form" layout="vertical">
             <ResourceFieldForm
               v-model="form"
@@ -126,7 +134,7 @@
               :relation-loading="relations.loading"
               :role-options="roleOptions"
               :contract-attachment="contractAttachmentState"
-              @change-relation="relationLinkage.change"
+              @change-relation="changeRelation"
               @search-relation="relationLinkage.search"
               @select-attachment="contractAttachment.select"
               @remove-attachment="confirmRemoveContractAttachment"
@@ -188,7 +196,11 @@ import {
   recordStatusColor,
   recordStatusLabel,
 } from '@/api/resource-display';
-import { getResource, type DetailAction } from '@/api/resources';
+import {
+  getResource,
+  type DetailAction,
+  type ResourceField,
+} from '@/api/resources';
 import { useUserStore } from '@/store';
 import ResourceAccountSummary from './ResourceAccountSummary.vue';
 import ResourceActionDialog from './ResourceActionDialog.vue';
@@ -246,6 +258,12 @@ const staffOwnerGuard = useStaffCredentialOwnerGuard({
 const resolvedStaffType = staffOwnerGuard.resolvedStaffType;
 const relations = staffOwnerGuard.relations;
 const relationLinkage = useResourceRelationLinkage(form, relations);
+const productOwnershipKeys = [
+  'warehouse_identity',
+  'gas_basic_identity',
+  'delivery_basic_identity',
+  'user_account_identity',
+];
 const actionVisible = ref(false);
 const activeAction = ref<DetailAction>();
 const avatar = useResourceAvatar();
@@ -262,6 +280,22 @@ const contractAttachmentState = computed(() => ({
   removed: contractAttachment.removed.value,
 }));
 
+/** 新建智能气阀选择归属时清空其他互斥归属，再执行字段原有联动。 */
+async function changeRelation(field: ResourceField, value: unknown) {
+  if (
+    mode.value === 'create' &&
+    definition.value.name === 'product_info' &&
+    productOwnershipKeys.includes(field.key) &&
+    value != null &&
+    String(value).trim() !== ''
+  ) {
+    for (const key of productOwnershipKeys) {
+      if (key !== field.key) form[key] = undefined;
+    }
+  }
+  await relationLinkage.change(field, value);
+}
+
 const accountSummary = computed(() => usesAccountSummary(definition.value));
 const accountSummaryVisible = computed(
   () =>