feat(web): refactor knowledge base form state management and field synchronization

- Add Form.useWatch hook to monitor _third_party_platform field changes directly
- Implement useEffect to sync form value to thirdPartyPlatform state when platform changes
- Remove redundant conditional field assignments for third-party and web parser configs
- Consolidate third-party platform state initialization in setBaseFields function
- Update Feishu parameter naming from generic (app_id, app_secret, folder_token) to prefixed format (feishu_app_id, feishu_app_secret, feishu_folder_token)
- Rename third_party_platform field to _third_party_platform for consistency
- Optimize useEffect dependencies to prevent unnecessary re-renders and state inconsistencies
- Improve form field initialization logic to handle both create and edit modes correctly
- Simplify third-party platform state management by centralizing it in setBaseFields instead of multiple locations

web/src/views/KnowledgeBase/components/RecallTestResult.tsx

@@ -100,6 +100,20 @@ const RecallTestResult = ({
     }
   };
 
+  // Show skeleton when initial loading
+  if (loading && data.length === 0) {
+    return (
+      <div className='rb:flex rb:flex-col'>
+        <div className='rb:flex rb:items-center rb:justify-start rb:gap-2 rb:mb-4'>
+          <span className='rb:text-lg rb:font-medium'>{t('knowledgeBase.recallResult')}</span>
+        </div>
+        <Skeleton active paragraph={{ rows: 3 }} />
+        <Skeleton active paragraph={{ rows: 3 }} className='rb:mt-4' />
+        <Skeleton active paragraph={{ rows: 3 }} className='rb:mt-4' />
+      </div>
+    );
+  }
+
   if (data.length === 0 && showEmpty) {
     return (
       <NoData