feat: 培训/绩效/违纪员工端签收+管理端签字状态只读化

- 后端: portal新增培训/绩效/违纪列表查看+签收接口，签收时创建证据链
- 管理端: 弹窗去掉HR手动签字勾选，改为只读显示签字状态
- 绩效列表新增签字状态列
- 员工端: 新增MyRecords页面，支持培训签收/拒绝、绩效签字、违纪签字
- 员工端导航新增'我的记录'入口
- EvidenceCategory新增TRAINING/PERFORMANCE类型

frontend/src/App.tsx

@@ -54,6 +54,7 @@ const EmployeeHome = lazy(() => import('./pages/portal/EmployeeHome'))
 const OnboardingProgress = lazy(() => import('./pages/portal/OnboardingProgress'))
 const ResignationApply = lazy(() => import('./pages/portal/ResignationApply'))
 const MyEsign = lazy(() => import('./pages/portal/MyEsign'))
+const MyRecords = lazy(() => import('./pages/portal/MyRecords'))
 const RiskCenter = lazy(() => import('./pages/compliance/RiskCenter'))
 const SalaryDashboard = lazy(() => import('./pages/SalaryDashboard'))
 const CommercialInsurance = lazy(() => import('./pages/CommercialInsurance'))
@@ -232,6 +233,7 @@ export default function App() {
       <Route path="/portal/onboarding-progress" element={<PortalLayoutWrapper><OnboardingProgress /></PortalLayoutWrapper>} />
       <Route path="/portal/resignation" element={<PortalLayoutWrapper><ResignationApply /></PortalLayoutWrapper>} />
       <Route path="/portal/esign" element={<PortalLayoutWrapper><MyEsign /></PortalLayoutWrapper>} />
+      <Route path="/portal/records" element={<PortalLayoutWrapper><MyRecords /></PortalLayoutWrapper>} />
 
       {/* 兜底 */}
       <Route path="*" element={<Navigate to="/" replace />} />