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/services/integration.api.ts

@@ -10,6 +10,7 @@ export interface SiteIntegration {
   platform: 'wordpress' | 'shopify' | 'custom';
   platform_type: 'cms' | 'ecommerce' | 'custom_api';
   config_json: Record<string, any>;
+  credentials_json?: Record<string, any>;
   is_active: boolean;
   sync_enabled: boolean;
   last_sync_at?: string;
@@ -23,7 +24,7 @@ export interface CreateIntegrationData {
   platform: 'wordpress' | 'shopify' | 'custom';
   platform_type?: 'cms' | 'ecommerce' | 'custom_api';
   config_json: Record<string, any>;
-  credentials?: Record<string, string>;
+  credentials_json?: Record<string, string>;
   is_active?: boolean;
   sync_enabled?: boolean;
 }
@@ -126,10 +127,10 @@ export const integrationApi = {
       platform: 'wordpress',
       platform_type: 'cms',
       config_json: {
-        url: data.url,
-        username: data.username,
+        site_url: data.url,
       },
-      credentials: {
+      credentials_json: {
+        username: data.username,
         app_password: data.app_password,
       },
       is_active: data.is_active ?? true,