test(end to end): update tests (login page has now login via email)

static/login.html

@@ -95,7 +95,7 @@
                     >
                 </div>
                 
-                <button type="submit" class="auth-button" data-i18n="auth.login_button">Log in</button>
+                <button type="submit" class="auth-button" id="login-submit" data-i18n="auth.login_button">Log in</button>
             </form>
             
             <!-- SSO / OIDC login section (hidden by default, shown dynamically) -->

tests/e2e/scenarios/01-home-and-login.spec.ts

@@ -28,7 +28,7 @@ test('login with wrong password is rejected', async ({ page }) => {
 
   await page.locator('#login-username').fill(TEST_ADMIN.username);
   await page.locator('#login-password').fill('definitely-wrong-password');
-  await page.locator('#login-panel button[type="submit"]').click();
+  await page.locator('#login-submit').click();
 
   const loginError = page.locator('#login-error');
   await expect(loginError).toBeVisible();

tests/e2e/scenarios/helpers.ts

@@ -44,7 +44,7 @@ export async function loginAsAdmin(page: Page) {
   await goToLoginPage(page);
   await page.locator('#login-username').fill(TEST_ADMIN.username);
   await page.locator('#login-password').fill(TEST_ADMIN.password);
-  await page.locator('#login-panel button[type="submit"]').click();
+  await page.locator('#login-submit').click();
   await expect(page.locator('#sidebar')).toBeVisible({ timeout: 15_000 });
   // Wait for the JS app to initialise: avatar vignette present ⟹ click handler attached.
   await expect(page.locator('#user-avatar-btn .user-vignette')).toBeAttached({ timeout: 10_000 });