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/components/publishing/PublishingRules.tsx

@@ -142,8 +142,8 @@ export default function PublishingRules({ rules, onChange }: PublishingRulesProp
                     <SelectDropdown
                       options={CONTENT_TYPES}
                       value={rule.content_type}
-                      onChange={(e) =>
-                        handleUpdateRule(rule.id, 'content_type', e.target.value)
+                      onChange={(value) =>
+                        handleUpdateRule(rule.id, 'content_type', value)
                       }
                     />
                   </div>
@@ -153,8 +153,8 @@ export default function PublishingRules({ rules, onChange }: PublishingRulesProp
                     <SelectDropdown
                       options={TRIGGERS}
                       value={rule.trigger}
-                      onChange={(e) =>
-                        handleUpdateRule(rule.id, 'trigger', e.target.value)
+                      onChange={(value) =>
+                        handleUpdateRule(rule.id, 'trigger', value)
                       }
                     />
                   </div>