Add aftersales work order frontend pages

- Public scan-to-confirm page (/aftersales/:sn) with phone last-4 verification
- Admin list + detail pages with state machine, QR generation, reassign, force-close
- PublicLayout extracted from PublicQuery so both pages share logo + 备案 chrome
- PublicQuery auto-redirects scanned zjbf-sh-* serials to the aftersales page
- AdminLayout: new 售后工单 menu entry

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/App.tsx

@@ -7,6 +7,9 @@ import DashboardPage from './pages/Dashboard';
 import ManagePage from './pages/Manage';
 import ProfilePage from './pages/Profile';
 import EmployeeSerialsPage from './pages/EmployeeSerials';
+import AftersalesPage from './pages/Aftersales';
+import AftersalesDetailPage from './pages/AftersalesDetail';
+import AftersalesConfirmPage from './pages/AftersalesConfirm';
 
 const PrivateRoute = () => {
   const user = authApi.getCurrentUser();
@@ -25,11 +28,7 @@ const PublicRoute = ({ children }: { children: React.ReactNode }) => {
 };
 
 const AdminRoutes = () => {
-  return (
-    <AdminLayout>
-      <Outlet />
-    </AdminLayout>
-  );
+  return <AdminLayout />;
 };
 
 function App() {
@@ -43,13 +42,16 @@ function App() {
           </PublicRoute>
         } />
         <Route path="/query" element={<PublicQueryPage />} />
-        
+        <Route path="/aftersales/:serialNumber" element={<AftersalesConfirmPage />} />
+
         <Route element={<PrivateRoute />}>
           <Route element={<AdminRoutes />}>
             <Route path="/admin" element={<Navigate to="dashboard" replace />} />
             <Route path="/admin/dashboard" element={<DashboardPage />} />
             <Route path="/admin/manage" element={<ManagePage />} />
             <Route path="/admin/employee-serials" element={<EmployeeSerialsPage />} />
+            <Route path="/admin/aftersales" element={<AftersalesPage />} />
+            <Route path="/admin/aftersales/:serialNumber" element={<AftersalesDetailPage />} />
             <Route path="/admin/profile" element={<ProfilePage />} />
           </Route>
         </Route>