🐛 fix: Update Responses search tool to web_search (#9354)

* ✨ feat: 更新搜索工具为 web_search

* Update index.test.ts

packages/model-runtime/src/providers/openai/index.test.ts

@@ -249,7 +249,7 @@ describe('LobeOpenAI', () => {
   });
 
   describe('responses.handlePayload', () => {
-    it('should add web_search_preview tool when enabledSearch is true', async () => {
+    it('should add web_search tool when enabledSearch is true', async () => {
       const payload = {
         messages: [{ content: 'Hello', role: 'user' as const }],
         model: 'gpt-4o', // 使用常规模型，通过 enabledSearch 触发 responses API
@@ -263,7 +263,7 @@ describe('LobeOpenAI', () => {
       const createCall = (instance['client'].responses.create as Mock).mock.calls[0][0];
       expect(createCall.tools).toEqual([
         { type: 'function', name: 'test', description: 'test' },
-        { type: 'web_search_preview' },
+        { type: 'web_search' },
       ]);
     });
 

packages/model-runtime/src/providers/openai/index.ts

@@ -82,7 +82,7 @@ export const LobeOpenAI = createOpenAICompatibleRuntime({
         ? [
             ...(tools || []),
             {
-              type: 'web_search_preview',
+              type: 'web_search',
               ...(oaiSearchContextSize && {
                 search_context_size: oaiSearchContextSize,
               }),