simple mode tool reason (#3984)

* simple mode tool reason

* model config cannot set empty

* perf: read files code

* perf: mongo gridfs chunks

* perf: doc

packages/service/core/ai/audio/speech.ts

@@ -43,13 +43,13 @@ export async function text2Speech({
   const readableStream = response.body as unknown as NodeJS.ReadableStream;
   readableStream.pipe(res);
 
-  let bufferStore = Buffer.from([]);
+  const chunks: Uint8Array[] = [];
 
   readableStream.on('data', (chunk) => {
-    bufferStore = Buffer.concat([bufferStore, chunk]);
+    chunks.push(chunk);
   });
   readableStream.on('end', () => {
-    onSuccess({ model, buffer: bufferStore });
+    onSuccess({ model, buffer: Buffer.concat(chunks) });
   });
   readableStream.on('error', (e) => {
     onError(e);

packages/service/core/ai/config/provider/DeepSeek.json

@@ -46,8 +46,8 @@
       "defaultConfig": {},
       "fieldMap": {},
       "type": "llm",
-      "showTopP": true,
-      "showStopSign": true
+      "showTopP": false,
+      "showStopSign": false
     }
   ]
 }