fix: when edit load balancing config not pass the empty filed value hidden (#8366)

web/app/components/header/account-setting/model-provider-page/model-modal/model-load-balancing-entry-modal.tsx

@@ -192,12 +192,12 @@ const ModelLoadBalancingEntryModal: FC<ModelModalProps> = ({
   })
   const getSecretValues = useCallback((v: FormValue) => {
     return secretFormSchemas.reduce((prev, next) => {
-      if (v[next.variable] === initialFormSchemasValue[next.variable])
+      if (isEditMode && v[next.variable] && v[next.variable] === initialFormSchemasValue[next.variable])
         prev[next.variable] = '[__HIDDEN__]'
 
       return prev
     }, {} as Record<string, string>)
-  }, [initialFormSchemasValue, secretFormSchemas])
+  }, [initialFormSchemasValue, isEditMode, secretFormSchemas])
 
   // const handleValueChange = ({ __model_type, __model_name, ...v }: FormValue) => {
   const handleValueChange = (v: FormValue) => {