Update server/chatStream.js

server/chatStream.js

@@ -172,12 +172,17 @@ export async function streamChat(ws, {
 }
 
 function normalizeMessage(msg) {
-  if (msg.role === "tool") {
-    return { role: "tool", tool_call_id: msg.tool_call_id, content: String(msg.content) };
-  }
   if (msg.role === "assistant" && msg.tool_calls) {
     return { role: "assistant", content: "", tool_calls: msg.tool_calls };
   }
+  // Flatten multipart content arrays to text-only for history
+  if (Array.isArray(msg.content)) {
+    const textOnly = msg.content
+      .filter(b => b.type === "text")
+      .map(b => b.text)
+      .join("\n");
+    return { role: msg.role, content: textOnly || "" };
+  }
   return { role: msg.role, content: msg.content };
 }