fix(ci): auto-enable GitHub Pages on first deploy

actions/configure-pages returns 404 when the repository has not yet
enabled Pages. Setting enablement: true turns Pages on during the first
deploy workflow run, so forks of this template don't need the 'Settings
→ Pages → Source = GitHub Actions' manual step.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: agjs

.github/workflows/deploy-pages.yml

@@ -28,6 +28,10 @@ jobs:
           cache: pnpm
       - uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5.0.0
         id: pages
+        with:
+          # Auto-enables Pages on first run so forkers don't have to
+          # click Settings → Pages → Source = "GitHub Actions" manually.
+          enablement: true
       - run: pnpm install --frozen-lockfile
       - name: build with public base path
         env: