优化合同气瓶绑定与启用失败提示

- 将绑定气瓶入口移至合同列表，仅草稿合同显示
- 自动预填所选合同并保留返回路径
- 细分附件、有效期、气瓶绑定和状态校验失败原因
- 增加前后端回归检查及中文操作日志

frontend/platform_admin/src/views/shared/CrudListPage.vue

@@ -107,6 +107,12 @@
               <a-button v-if="definition.accountManagement" size="mini" type="primary" @click="manageAccounts(record)">账户管理</a-button>
               <a-button v-if="definition.name === 'staff_account'" size="mini" @click="viewCredentials(record)">查看资质</a-button>
               <a-button size="mini" @click="openRecord('detail', record)">详情</a-button>
+              <a-button
+                v-if="definition.name === 'gasorder_contract' && Number(record.contract_status) === 0"
+                size="mini"
+                type="primary"
+                @click="bindContractProduct(record)"
+              >绑定气瓶</a-button>
               <a-tooltip v-if="canEdit" :content="recordEditReason(record) || '编辑记录'">
                 <a-button size="mini" :disabled="Boolean(recordEditReason(record))" @click="openRecord('edit', record)">编辑</a-button>
               </a-tooltip>
@@ -370,6 +376,18 @@ function viewCredentials(row: ResourceRow) {
   });
 }
 
+/** 从草稿合同列表进入合同气瓶新建页，并预填所选合同。 */
+function bindContractProduct(row: ResourceRow) {
+  return router.push({
+    name: 'user-contract-products-create',
+    query: {
+      relation_key: 'gasorder_contract_identity',
+      owner_identity: String(row.identity ?? ''),
+      return_to: route.fullPath,
+    },
+  });
+}
+
 function returnManagedList() {
   const target = safeReturnPath(route.query.return_to);
   return router.push(target || { name: String(route.meta.activeMenu ?? '') });