feat: integrate pixel teacher presence and resilient classroom preview

src/pages/Login/index.tsx

@@ -9,6 +9,7 @@ import { hostApiFetch } from '@/lib/host-api';
 import { useAuthStore } from '@/stores/auth';
 import { useProviderStore } from '@/stores/providers';
 import logoSvg from '@/assets/logo.svg';
+import { codingRecoveryAccount, readCodingLoginRecovery } from '@/lib/coding-login-recovery';
 
 const LOGIN_SERVICE_ERROR_MESSAGE = '登录服务暂时不可用，请稍后重试。';
 const LOGIN_ERROR_MESSAGE = '登录失败，请稍后重试。';
@@ -117,6 +118,7 @@ export function Login() {
   const navigate = useNavigate();
   const location = useLocation();
   const returnPath = getSafeLoginReturnPath(location.state);
+  const reauthenticate = location.state?.reauthenticate === true;
   const loginWithPassword = useAuthStore((state) => state.loginWithPassword);
   const loginWithMobile = useAuthStore((state) => state.loginWithMobile);
   const loading = useAuthStore((state) => state.loading);
@@ -253,10 +255,10 @@ export function Login() {
   }, []);
 
   useEffect(() => {
-    if (isAuthenticated() && !submitting) {
+    if (isAuthenticated() && !submitting && !reauthenticate) {
       navigate(returnPath, { replace: true });
     }
-  }, [isAuthenticated, navigate, returnPath, submitting]);
+  }, [isAuthenticated, navigate, returnPath, submitting, reauthenticate]);
 
   const finishLogin = async (login: () => Promise<void>) => {
     setSubmitError(null);
@@ -271,7 +273,9 @@ export function Login() {
         await logout();
         throw syncError;
       }
-      navigate(returnPath, { replace: true });
+      const recovery = readCodingLoginRecovery(location.state?.codingRecovery);
+      const sameAccount = recovery?.account === codingRecoveryAccount(useAuthStore.getState().user);
+      navigate(returnPath, { replace: true, state: sameAccount ? { codingRecovery: recovery } : undefined });
     } catch (loginError) {
       setSubmitError(loginError instanceof Error ? loginError.message : String(loginError));
     } finally {