fix(pages): deploy the build from main with the repository base path

- trigger on main (the default branch) instead of the non-existent dev
- VITE_BASE_PATH /OpenCodeUI/ -> /PiAgentUI/, matching the repository name
- enable Pages automatically on the first run

.github/workflows/deploy.yml

@@ -2,7 +2,7 @@ name: Deploy to GitHub Pages
 
 on:
   push:
-    branches: [dev]
+    branches: [main]
   workflow_dispatch:
 
 permissions:
@@ -29,7 +29,12 @@ jobs:
 
       - run: npm run build
         env:
-          VITE_BASE_PATH: /OpenCodeUI/
+          VITE_BASE_PATH: /PiAgentUI/
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+        with:
+          enablement: true
 
       - uses: actions/upload-pages-artifact@v5
         with: