Refactor Dropdown Handlers and Update WordPress Integration

- Updated dropdown onChange handlers across multiple components to use direct value passing instead of event target value for improved clarity and consistency.
- Changed `url` to `site_url` in WordPress integration configuration for better semantic clarity.
- Enhanced Vite configuration to include `fast-deep-equal` for compatibility with `react-dnd`.
- Updated navigation paths in `SiteContentEditor` and `SiteList` for consistency with new routing structure.

frontend/src/pages/Sites/Editor.tsx

@@ -144,7 +144,7 @@ export default function SiteContentEditor() {
               <p className="text-gray-600 dark:text-gray-400 mb-4">
                 No pages found in this blueprint
               </p>
-              <Button onClick={() => navigate('/site-builder')} variant="primary">
+              <Button onClick={() => navigate('/sites/builder')} variant="primary">
                 Generate Pages
               </Button>
             </Card>