Revert demo to bundled build to avoid CORS issues

The importmap demo was hitting CORS issues with unpkg.
Use bundled build which has all dependencies included.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justalever

index.html

@@ -20,24 +20,19 @@
     <script>hljs.highlightAll();</script>
 
     <!--
-      Importmap Configuration (unpkg CDN)
+      Bundled Build Configuration
 
-      This demo uses the importmap distribution from unpkg CDN.
-      This is the recommended setup for Rails 7+ applications.
+      This demo uses the BUNDLED ESM version with all dependencies included.
+      No external CDN dependencies needed (except Stimulus).
 
       For Rails importmap apps, see IMPORTMAP.md for setup instructions.
       For npm/bundler apps, see BUILD.md for setup instructions.
     -->
     <script type="importmap">
       {
         "imports": {
-          "@hotwired/stimulus": "https://unpkg.com/@hotwired/stimulus@3.2.2/dist/stimulus.js",
-          "railsui-stimulus": "https://unpkg.com/railsui-stimulus@1.1.1/dist/importmap/index.js",
-          "tippy.js": "https://unpkg.com/tippy.js@6.3.7/dist/esm/tippy.esm.js",
-          "@popperjs/core": "https://unpkg.com/@popperjs/core@2.11.8/dist/esm/index.js",
-          "flatpickr": "https://unpkg.com/flatpickr@4.6.13/dist/esm/index.js",
-          "hotkeys-js": "https://unpkg.com/hotkeys-js@3.13.15/dist/hotkeys.esm.js",
-          "stimulus-use": "https://unpkg.com/stimulus-use@0.52.2/dist/index.js"
+          "@hotwired/stimulus": "https://ga.jspm.io/npm:@hotwired/stimulus@3.2.2/dist/stimulus.js",
+          "railsui-stimulus": "./dist/railsui-stimulus.module.js"
         }
       }
     </script>