Feat: Modify the default style of the agent node anchor #9869 (#10489)

### What problem does this PR solve?

Feat: Modify the default style of the agent node anchor #9869

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/hooks.tsx

@@ -25,7 +25,6 @@ import {
   initialBingValues,
   initialCategorizeValues,
   initialCodeValues,
-  initialConcentratorValues,
   initialCrawlerValues,
   initialDeepLValues,
   initialDuckValues,
@@ -124,7 +123,6 @@ export const useInitializeOperatorParams = () => {
       [Operator.AkShare]: initialAkShareValues,
       [Operator.YahooFinance]: initialYahooFinanceValues,
       [Operator.Jin10]: initialJin10Values,
-      [Operator.Concentrator]: initialConcentratorValues,
       [Operator.TuShare]: initialTuShareValues,
       [Operator.Note]: initialNoteValues,
       [Operator.Crawler]: initialCrawlerValues,
@@ -140,6 +138,7 @@ export const useInitializeOperatorParams = () => {
       [Operator.Tool]: {},
       [Operator.UserFillUp]: initialUserFillUpValues,
       [Operator.StringTransform]: initialStringTransformValues,
+      [Operator.Placeholder]: {},
     };
   }, [llmId]);