fix: 监听 formData.enterprise_id 变化加载部门

frontend/src/views/module_payment/institution/components/InstitutionForm.vue

@@ -361,6 +361,11 @@ watch(
   { immediate: true }
 );
 
+watch(
+  () => formData.enterprise_id,
+  (val) => { if (val) loadDepartments(); }
+);
+
 const rules = reactive({
   enterprise_id: [{ required: true, message: "请输入企业ID", trigger: "blur" }],
   name: [{ required: true, message: "请输入制度名称", trigger: "blur" }],