Auto-enable GitHub Pages in deploy workflow

Add actions/configure-pages with enablement so the first deploy turns on
Pages without a manual Settings toggle.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XPEvmMbac2fCvKXpQcovj8

.github/workflows/deploy.yml

@@ -27,6 +27,12 @@ jobs:
         with:
           node-version: 22
 
+      # Enables GitHub Pages on first run so no manual Settings toggle is needed.
+      - name: Configure Pages
+        uses: actions/configure-pages@v5
+        with:
+          enablement: true
+
       - name: Install dependencies
         run: npm install --no-audit --no-fund