流程提交对话框优化：新增顶级字典层级导入并完善字典选择功能

src/components/processSubmitDialog/processSubmitDialog.vue

@@ -184,6 +184,7 @@
   import { listOrganizations } from '@/api/system/organization';
   import dictMixins from '@/mixins/dictMixins';
   import { getByCode } from '@/api/system/dictionary-data';
+  import { topLevel1, topLevel2 } from '@/enum/dict';
 
   export default {
     name: 'processSubmitDialog',