Fix: The agent selected a knowledge base, but the API returned the error: "No dataset is selected". (#13950)

### What problem does this PR solve?

Fix: The agent selected a knowledge base, but the API returned the
error: "No dataset is selected".

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: balibabu <assassin_cike@163.com>

web/src/components/knowledge-base-item.tsx

@@ -71,7 +71,7 @@ export function KnowledgeBaseFormField({
   required = false,
 }: {
   showVariable?: boolean;
-  name: string;
+  name?: string;
   required?: boolean;
 }) {
   const form = useFormContext();

web/src/pages/agent/form/retrieval-form/next.tsx

@@ -46,7 +46,7 @@ export const RetrievalPartialSchema = {
   keywords_similarity_weight: z.coerce.number(),
   top_n: z.coerce.number(),
   top_k: z.coerce.number(),
-  kb_ids: z.array(z.string()),
+  database_ids: z.array(z.string()),
   rerank_id: z.string(),
   empty_response: z.string(),
   cross_languages: z.array(z.string()),