feat: 重构流程定义和流程实例模块，更新API命名，增强用户选择弹窗功能，支持多用户选择，优化流程实例创建界面。

feat: 完善流程定义模块、完善流程实例模块
feat: 完善OA请假模块
feat: 完善审批中心、发起流程、查看流程、工作流整体进度 40%

apps/web-antd/src/api/bpm/oa/leave/index.ts

@@ -0,0 +1,40 @@
+import type { PageParam, PageResult } from '@vben/request';
+
+import { requestClient } from '#/api/request';
+
+export namespace BpmOALeaveApi {
+  export interface LeaveVO {
+    id: number;
+    status: number;
+    type: number;
+    reason: string;
+    processInstanceId: string;
+    startTime: number;
+    endTime: number;
+    createTime: Date;
+    startUserSelectAssignees?: Record<string, string[]>;
+  }
+}
+
+/** 创建请假申请 */
+export async function createLeave(data: BpmOALeaveApi.LeaveVO) {
+  return requestClient.post('/bpm/oa/leave/create', data);
+}
+
+/** 更新请假申请 */
+export async function updateLeave(data: BpmOALeaveApi.LeaveVO) {
+  return requestClient.post('/bpm/oa/leave/update', data);
+}
+
+/** 获得请假申请 */
+export async function getLeave(id: number) {
+  return requestClient.get<BpmOALeaveApi.LeaveVO>(`/bpm/oa/leave/get?id=${id}`);
+}
+
+/** 获得请假申请分页 */
+export async function getLeavePage(params: PageParam) {
+  return requestClient.get<PageResult<BpmOALeaveApi.LeaveVO>>(
+    '/bpm/oa/leave/page',
+    { params },
+  );
+}