fix(seo): make auth noindex crawlable

frontend/e2e/seo.spec.ts

@@ -218,11 +218,19 @@ test('seo: css display flex page keeps route identity + structured data', async
   await expect(triviaMain).toContainText(/flex:\s*auto/i);
 });
 
-test('seo: login page is noindex', async ({ page }) => {
-  await setSeoHost(page, 'frontendatlas.com');
-  await page.goto('/auth/login');
-  await expect.poll(async () => (await getMeta(page, 'robots')) || '').toContain('noindex');
-});
+for (const route of ['/auth/login', '/auth/signup']) {
+  for (const query of ['', '?src=showcase_hero&redirectTo=%2Fdashboard']) {
+    test(`seo: crawlable auth page stays noindex at ${route}${query}`, async ({ page }) => {
+      await setSeoHost(page, 'frontendatlas.com');
+      await page.goto(`${route}${query}`);
+      const base = process.env.PLAYWRIGHT_SSR === '1'
+        ? (process.env.PLAYWRIGHT_CANONICAL_BASE || 'https://frontendatlas.com').replace(/\/$/, '')
+        : new URL(page.url()).origin;
+      await expect.poll(() => getMeta(page, 'robots')).toBe('noindex,nofollow');
+      await expect.poll(() => getCanonical(page)).toBe(`${base}${route}`);
+    });
+  }
+}
 
 test('seo: preview host forces noindex', async ({ page }) => {
   await setSeoHost(page, 'preview.frontendatlas.vercel.app');

frontend/scripts/audit-internal-link-equity.test.mjs

@@ -222,10 +222,28 @@ test('repository robots allows clean/parameterized previews without exposing pri
     assert.equal(allows(`/${family}/example/preview?entry=x&v=2`), true);
     for (const suffix of ['', '/preview-extra', '/preview/child']) assert.equal(allows(`/${family}/example${suffix}`), false);
   }
-  assert.equal(allows('/auth/login'), false);
   assert.equal(allows('/dashboard'), false);
 });
 
+test('repository robots lets crawlers read login/signup noindex without opening other auth or private paths', () => {
+  const allows = createRobotsPolicy(fs.readFileSync(path.join(frontendRoot, 'src', 'robots.txt'), 'utf8'));
+  for (const route of ['/auth/login', '/auth/signup']) {
+    for (const suffix of ['', '?src=showcase_hero', '?redirectTo=%2Fdashboard&src=pricing']) {
+      assert.equal(allows(`${route}${suffix}`), true, `${route}${suffix}`);
+    }
+    for (const suffix of ['-extra', '/child', '/child?src=pricing']) {
+      assert.equal(allows(`${route}${suffix}`), false, `${route}${suffix}`);
+    }
+  }
+  for (const route of [
+    '/auth/callback?code=example', '/auth/forgot-password', '/auth/reset-password',
+    '/dashboard', '/profile?tab=activity', '/admin/users', '/tracks/foundations-30d',
+    '/companies/google',
+  ]) {
+    assert.equal(allows(route), false, route);
+  }
+});
+
 test('robots combines matching groups, prefers Allow ties and respects specific agent policy', () => {
   const allows = createRobotsPolicy('User-agent: *\nDisallow: /\nUser-agent: Googlebot\nDisallow: /private\nUser-agent: Googlebot\nAllow: /private\nDisallow: /secret\n');
   assert.equal(allows('/'), true);

frontend/scripts/sitemap.test.mjs

@@ -842,6 +842,20 @@ function assertAngularMasteryRedirects() {
   }
 }
 
+function assertLegacyVueQuestionRedirect(paths) {
+  const source = '/vue/trivia/vue-destructuring-breaks-reactivity-toRefs-toRef';
+  const destination = '/vue/trivia/vue-destructuring-breaks-reactivity-torefs-toref';
+  const config = JSON.parse(fs.readFileSync(VERCEL_CONFIG_PATH, 'utf8'));
+  const matches = config.redirects.filter((redirect) => redirect.source === source);
+  if (matches.length !== 1 || matches[0].destination !== destination || matches[0].permanent !== true) {
+    throw new Error('The legacy mixed-case Vue question URL must permanently redirect to its canonical URL.');
+  }
+  const prerender = new Set(fs.readFileSync(PRERENDER_PATH, 'utf8').split(/\r?\n/).filter(Boolean));
+  if (!paths.has(destination) || !prerender.has(destination) || paths.has(source) || prerender.has(source)) {
+    throw new Error('Only the canonical Vue question URL should be included in sitemap and prerender output.');
+  }
+}
+
 function assertRobotsAllowsCodingQueryNoindex() {
   if (!fs.existsSync(ROBOTS_PATH)) {
     throw new Error(`Missing ${ROBOTS_PATH}.`);
@@ -1205,6 +1219,7 @@ assertAngularHttpCancellationLabSitemapEntry(entries);
 assertReactStaleClosuresSitemapEntry(entries);
 assertIndexableRouteTitlesUnique();
 assertAngularMasteryRedirects();
+assertLegacyVueQuestionRedirect(paths);
 assertRobotsAllowsCodingQueryNoindex();
 assertVercelCodingQueryNoindexHeaders();
 assertVercelLockedRouteNoindexHeaders();

frontend/src/robots.txt

@@ -1,6 +1,10 @@
 User-agent: *
 Allow: /
 Disallow: /auth/
+Allow: /auth/login$
+Allow: /auth/login?
+Allow: /auth/signup$
+Allow: /auth/signup?
 Disallow: /dashboard
 Disallow: /profile
 Disallow: /admin

frontend/vercel.json

@@ -103,6 +103,11 @@
     }
   ],
   "redirects": [
+    {
+      "source": "/vue/trivia/vue-destructuring-breaks-reactivity-toRefs-toRef",
+      "destination": "/vue/trivia/vue-destructuring-breaks-reactivity-torefs-toref",
+      "permanent": true
+    },
     {
       "source": "/guides/framework-prep/react-prep-path/mastery",
       "destination": "/guides/framework-prep/react-prep-path",