test: cover session expiry messaging

apps/web/src/pages/LoginPage.stories.js

@@ -1,5 +1,6 @@
 import LoginPage from './LoginPage.vue';
 import { expect, userEvent, within } from '@storybook/test';
+import { storybookRouter } from '../../.storybook/router.js';
 
 export default { title: 'Pages/LoginPage', component: LoginPage };
 export const Empty = {};
@@ -20,3 +21,11 @@ export const ErrorFocus = {
     }
   },
 };
+
+export const SessionExpired = {
+  beforeEach: async () => { await storybookRouter.push({ name: 'login', query: { reason: 'session-expired' } }); },
+  play: async ({ canvasElement }) => {
+    const canvas = within(canvasElement);
+    await expect(canvas.getByRole('alert')).toHaveTextContent('Your session expired. Sign in again to continue.');
+  },
+};

docs/IMPLEMENTATION-STATUS.md

@@ -278,6 +278,7 @@ Remaining roadmap areas are approved external provider credentials/adapters, bro
 - Login error focus behavior now has Storybook interaction coverage using a deterministic failed-authentication response.
 - Admin logout now exposes a busy state and disables repeat activation while the session is being revoked.
 - Expired admin sessions now redirect to login with an accessible explanation that prompts the user to sign in again.
+- Session-expired login messaging now has Storybook interaction coverage.
 
 ## Local Commands