fix(fixcontact): 调整定点联系单页面格式并修复反馈表单组件引用

- 查询筛选列由 xl=4 放宽为 xl=6，解决联系单位/主办部门多选框被遮挡
- 相关分管所领导筛选框改为常驻显示，展开/收起仅控制协办部门
- Form/BPMForm 宽标签列改为 6/18、7/17，避免长标签文字溢出
- FeedbackForm 修复 SzSelectUser 组件导入名并调整 labelCol/wrapperCol
- 新增 FIXCONTACT_CHECKLIST.md 核对说明文档

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/views/bg/fixcontact/components/FixedContact20260730FeedbackForm.vue

@@ -59,7 +59,7 @@
   import { Form } from 'ant-design-vue';
   import JFormContainer from '/@/components/Form/src/container/JFormContainer.vue';
   import SzSelectDept from '/@/components/Form/src/jeecg/components/SzSelectDept.vue';
-  import SzUserSelect from '/@/components/semri/userComponent/SzUserSelect.vue';
+  import SzSelectUser from '/@/components/semri/userComponent/SzUserSelect.vue';
   import { useUserStore } from '/@/store/modules/user';
 
   const mainId = inject('mainId');
@@ -88,8 +88,8 @@
   });
   const disabled = computed(() => props.disabled);
   const formItemLayout = {
-    labelCol: { xs: { span: 24 }, sm: { span: 5 } },
-    wrapperCol: { xs: { span: 24 }, sm: { span: 16 } },
+    labelCol: { xs: { span: 24 }, sm: { span: 6 } },
+    wrapperCol: { xs: { span: 24 }, sm: { span: 18 } },
   };
 
   function add() {