chore: 初始化uniapp前端项目基础框架

新增项目配置、静态资源、工具类、状态管理、API接口、组件库集成等全套基础代码，完成项目初始化搭建

frontend/app/src/api/module_system/dept.ts

@@ -0,0 +1,52 @@
+import type { BatchSetStatus } from './user'
+import { http } from '@/http'
+
+const SYSTEM_BASE = '/system'
+
+/**
+ * 部门管理 API
+ * 与 web 端 module_system/dept.ts 对齐（完整字段定义）
+ */
+export const DeptAPI = {
+  getTree(search?: DeptQuery): Promise<DeptItem[]> {
+    return http.Get(`${SYSTEM_BASE}/dept/tree`, search)
+  },
+  getDetail(id: number): Promise<DeptItem> {
+    return http.Get(`${SYSTEM_BASE}/dept/detail/${id}`)
+  },
+  create(data: DeptForm): Promise<DeptItem> {
+    return http.Post(`${SYSTEM_BASE}/dept/create`, data)
+  },
+  update(id: number, data: DeptForm): Promise<DeptItem> {
+    return http.Put(`${SYSTEM_BASE}/dept/update/${id}`, data)
+  },
+  remove(ids: number[]): Promise<void> {
+    return http.Delete(`${SYSTEM_BASE}/dept/delete`, { ids: JSON.stringify(ids) })
+  },
+  batchStatus(data: BatchSetStatus): Promise<void> {
+    return http.Patch(`${SYSTEM_BASE}/dept/status/batch`, data)
+  },
+}
+
+export interface DeptQuery {
+  name?: string
+  status?: string
+}
+
+export interface DeptForm extends BaseFormType {
+  name?: string
+  code: string
+  parent_id?: number
+  order?: number
+  leader?: string
+  phone?: string
+  email?: string
+  status?: number
+  description?: string
+}
+
+export interface DeptItem extends BaseType, DeptForm {
+  id: number
+  parent_name?: string
+  children?: DeptItem[]
+}