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_task/workflow/flow.ts

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+/**
+ * 工作流流程 API 模块（对应后端 `plugin.module_task.workflow.flow`）
+ * 与 web 端 module_task/workflow/flow.ts 对齐（完整字段定义）
+ */
+import { http } from '@/http'
+
+const FLOW_BASE = '/task/workflow/flow'
+
+/* ==================== 流程编排 ==================== */
+export const WorkflowAPI = {
+  /** 工作流详情 */
+  getDetail(id: number): Promise<WorkflowItem> {
+    return http.Get(`${FLOW_BASE}/detail/${id}`)
+  },
+  /** 工作流列表 */
+  getPage(params?: Record<string, any>): Promise<PageResult<WorkflowItem>> {
+    return http.Get(`${FLOW_BASE}/list`, params)
+  },
+  /** 创建工作流 */
+  create(data: WorkflowForm): Promise<WorkflowItem> {
+    return http.Post(`${FLOW_BASE}/create`, data)
+  },
+  /** 更新工作流 */
+  update(id: number, data: WorkflowForm): Promise<WorkflowItem> {
+    return http.Put(`${FLOW_BASE}/update/${id}`, data)
+  },
+  /** 删除工作流 */
+  remove(ids: number[]): Promise<void> {
+    return http.Delete(`${FLOW_BASE}/delete`, { ids: JSON.stringify(ids) })
+  },
+  /** 发布工作流 */
+  publish(id: number): Promise<void> {
+    return http.Post(`${FLOW_BASE}/publish/${id}`)
+  },
+  /** 执行工作流 */
+  execute(data: WorkflowExecuteForm): Promise<WorkflowExecuteResult> {
+    return http.Post(`${FLOW_BASE}/execute`, data)
+  },
+}
+
+/* ==================== 类型定义 ==================== */
+
+export interface WorkflowPageQuery extends PageQuery {
+  name?: string
+  code?: string
+  status?: number
+}
+
+export interface WorkflowForm {
+  name: string
+  description?: string
+  nodes?: WorkflowNode[]
+  edges?: WorkflowEdge[]
+}
+
+export interface WorkflowItem extends WorkflowForm {
+  id: number
+  status?: string
+  version?: number
+  created_time?: string
+  updated_time?: string
+}
+
+export interface WorkflowPublishForm {
+  remark?: string
+}
+
+export interface WorkflowExecuteForm {
+  workflow_id: number
+  variables?: Record<string, any>
+  business_key?: string
+  job_id?: number
+}
+
+export interface WorkflowExecuteResult {
+  workflow_id: number
+  workflow_name: string
+  status: number
+  start_time?: string
+  end_time?: string
+  variables?: Record<string, any>
+  node_results?: Record<string, any>
+  error?: string
+}
+
+export interface WorkflowNode {
+  id?: string
+  type: string
+  label?: string
+  position?: { x: number, y: number }
+  data?: Record<string, any>
+}
+
+export interface WorkflowEdge {
+  id?: string
+  source: string
+  target: string
+  label?: string
+  condition?: string
+}