chore: demo page for system/department (#5611)

* feat: department management demo

* perf: department page improve

* feat: demo api middleware

* fix: add losing import

playground/src/api/system/dept.ts

@@ -0,0 +1,54 @@
+import { requestClient } from '#/api/request';
+
+export namespace SystemDeptApi {
+  export interface SystemDept {
+    [key: string]: any;
+    children?: SystemDept[];
+    id: string;
+    name: string;
+    remark?: string;
+    status: 0 | 1;
+  }
+}
+
+/**
+ * 获取部门列表数据
+ */
+async function getDeptList() {
+  return requestClient.get<Array<SystemDeptApi.SystemDept>>(
+    '/system/dept/list',
+  );
+}
+
+/**
+ * 创建部门
+ * @param data 部门数据
+ */
+async function createDept(
+  data: Omit<SystemDeptApi.SystemDept, 'children' | 'id'>,
+) {
+  return requestClient.post('/system/dept', data);
+}
+
+/**
+ * 更新部门
+ *
+ * @param id 部门 ID
+ * @param data 部门数据
+ */
+async function updateDept(
+  id: string,
+  data: Omit<SystemDeptApi.SystemDept, 'children' | 'id'>,
+) {
+  return requestClient.put(`/system/dept/${id}`, data);
+}
+
+/**
+ * 删除部门
+ * @param id 部门 ID
+ */
+async function deleteDept(id: string) {
+  return requestClient.delete(`/system/dept/${id}`);
+}
+
+export { createDept, deleteDept, getDeptList, updateDept };