feat: 20260815 系统优化 - 全部31项问题修复(P0×6+P1×14+P2×9+P3×2)

P0紧急修复(6项):
- 草稿保存完整恢复所有字段(含socialAvgWage)
- 补偿金批次从compensationBreakdown读取
- 违法解除风险确认UI
- 合同结束日期前后校验(前后端双保险)

P1高优先级(14项):
- 离职日期联动社保/公积金截止月(15号规则)
- 合规检查+工作交接改为软阻断(生成待办)
- 补偿月数(N/N+1/2N/自定义)+计算基数(近12月/合同/自定义)
- 解聘并入花名册操作栏(类型选择跳转向导)
- 合同续签开始日期自动推导(原合同结束日+1天)
- 年龄合规筛查(童工阻断/未成年工/退休警告)
- 编辑入职日期后状态联动(待入职↔在职)
- 转正移植到花名册操作栏+薪资回写
- 男职工无法选择三期

P2体验优化(9项):
- "劳动合同"调整为"用工关系"
- 费用结算新增剩余年假折算(300%日工资)
- 身份证号全域改为"证件号码"(前后端18个文件)
- 手机号查重
- 开具证明+合同续签移植到花名册操作栏
- 批量转正+批量开具证明
- 去掉用工办理模块

P3规划(2项):
- 组织架构+审批流(Department/Position/ApprovalFlow/ApprovalInstance)
- 客服工作台(Ticket/ChatSession+SUPPORT角色)

新增模型: Department/Position/ApprovalFlow/ApprovalInstance/Ticket/TicketMessage/ChatSession/ChatMessage
新增字段: Employee.departmentId/supervisorId
新增角色: SUPPORT

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

backend/src/app.ts

@@ -61,6 +61,10 @@ import auditRoutes from './routes/audit.routes'
 import calendarRoutes from './routes/calendar.routes'
 import platformRoutes from './routes/platform.routes'
 import workProcessRoutes from './routes/work-process.routes'
+import departmentRoutes from './routes/department.routes'
+import positionRoutes from './routes/position.routes'
+import approvalRoutes from './routes/approval.routes'
+import supportRoutes from './routes/support.routes'
 import enterpriseTemplateRoutes from './routes/enterprise-template.routes'
 import specialStatusRoutes from './routes/special-status.routes'
 import companyFileRoutes from './routes/company-file.routes'
@@ -93,6 +97,10 @@ app.use('/api/v1/audit', auditRoutes)
 app.use('/api/v1/calendar', calendarRoutes)
 app.use('/api/v1/platform', platformRoutes)
 app.use('/api/v1/work-processes', workProcessRoutes)
+app.use('/api/v1/departments', departmentRoutes)
+app.use('/api/v1/positions', positionRoutes)
+app.use('/api/v1/approvals', approvalRoutes)
+app.use('/api/v1/support', supportRoutes)
 app.use('/api/v1/enterprise-templates', enterpriseTemplateRoutes)
 app.use('/api/v1/special-statuses', specialStatusRoutes)
 app.use('/api/v1/company-files', companyFileRoutes)