Update app.py

app.py

@@ -767,10 +767,15 @@ def chat():
         except Exception:
             return Response("Cohere non-json response", mimetype="text/plain", status=500)
         
-        ai_text = (
-            res_json
-            .get("content", {})
-        )
+        ai_text = ""
+        if (
+            isinstance(res_json, dict)
+            and "message" in res_json
+            and "content" in res_json["message"]
+            and isinstance(res_json["message"]["content"], list)
+            and len(res_json["message"]["content"]) > 0
+        ):
+            ai_text = res_json["message"]["content"][0].get("text", "")
         
         return Response(ai_text, mimetype="text/plain")
     # =====================================================