fix login entry fallback

src/components/auth/AuthGate.test.tsx

@@ -216,6 +216,48 @@ test('auth gate does not auto-create a guest account when dev guest switch is no
   expect(await screen.findByText('应用内容')).toBeTruthy();
 });
 
+test('auth gate keeps password entry available when login options are empty', async () => {
+  const user = userEvent.setup();
+
+  authMocks.getCurrentAuthUser.mockResolvedValue({
+    user: null,
+    availableLoginMethods: [],
+  });
+  authMocks.getAuthLoginOptions.mockResolvedValue({
+    availableLoginMethods: [],
+  });
+
+  render(
+    <AuthGate>
+      <ProtectedActionButton onAuthenticated={vi.fn()} />
+    </AuthGate>,
+  );
+
+  await user.click(await screen.findByRole('button', { name: '进入作品' }));
+
+  const dialog = screen.getByRole('dialog', { name: '账号入口' });
+  expect(within(dialog).getByLabelText('密码')).toBeTruthy();
+  expect(within(dialog).queryByText('当前登录入口暂不可用。')).toBeNull();
+});
+
+test('auth gate falls back to password entry when login options request fails', async () => {
+  const user = userEvent.setup();
+
+  authMocks.getAuthLoginOptions.mockRejectedValue(new Error('读取登录方式失败'));
+
+  render(
+    <AuthGate>
+      <ProtectedActionButton onAuthenticated={vi.fn()} />
+    </AuthGate>,
+  );
+
+  await user.click(await screen.findByRole('button', { name: '进入作品' }));
+
+  const dialog = screen.getByRole('dialog', { name: '账号入口' });
+  expect(within(dialog).getByLabelText('密码')).toBeTruthy();
+  expect(within(dialog).queryByText('当前登录入口暂不可用。')).toBeNull();
+});
+
 test('auth gate opens a login modal for protected actions and resumes after login', async () => {
   const user = userEvent.setup();
   const onAuthenticated = vi.fn();

src/components/auth/AuthGate.tsx

@@ -57,6 +57,20 @@ type AuthStatus =
   | 'ready'
   | 'error';
 
+const FALLBACK_LOGIN_METHODS: AuthLoginMethod[] = ['password'];
+
+function normalizeAvailableLoginMethods(
+  methods: AuthLoginMethod[] | null | undefined,
+): AuthLoginMethod[] {
+  const normalizedMethods = Array.from(new Set(methods ?? []));
+
+  // 密码登录由 Rust auth entry 固定承载，不依赖短信或微信环境开关。
+  // 当 login-options 联调失败或配置返回空数组时，仍要保留账号入口，避免登录弹窗失去可操作方式。
+  return normalizedMethods.length > 0
+    ? normalizedMethods
+    : FALLBACK_LOGIN_METHODS;
+}
+
 export function AuthGate({ children }: AuthGateProps) {
   const [status, setStatus] = useState<AuthStatus>('checking');
   const [user, setUser] = useState<AuthUser | null>(null);
@@ -202,7 +216,9 @@ export function AuthGate({ children }: AuthGateProps) {
           return null;
         }
 
-        setAvailableLoginMethods(options.availableLoginMethods);
+        setAvailableLoginMethods(
+          normalizeAvailableLoginMethods(options.availableLoginMethods),
+        );
         return options;
       };
 
@@ -220,7 +236,7 @@ export function AuthGate({ children }: AuthGateProps) {
             return;
           }
 
-          setAvailableLoginMethods([]);
+          setAvailableLoginMethods(FALLBACK_LOGIN_METHODS);
           setUser(null);
           setError(
             optionsError instanceof Error
@@ -245,13 +261,17 @@ export function AuthGate({ children }: AuthGateProps) {
         }
 
         if (!nextSession.user) {
-          setAvailableLoginMethods(nextSession.availableLoginMethods);
+          setAvailableLoginMethods(
+            normalizeAvailableLoginMethods(nextSession.availableLoginMethods),
+          );
           await resolveGuestFallback();
           return;
         }
 
         setUser(nextSession.user);
-        setAvailableLoginMethods(nextSession.availableLoginMethods);
+        setAvailableLoginMethods(
+          normalizeAvailableLoginMethods(nextSession.availableLoginMethods),
+        );
         setStatus(
           nextSession.user.bindingStatus === 'pending_bind_phone'
             ? 'pending_bind_phone'