fix json display

app.py

@@ -80,7 +80,7 @@ def _try_parse_json(value: Any) -> Any:
 def _format_json_block(value: Any) -> str:
     parsed = _try_parse_json(value)
     if isinstance(parsed, (dict, list)):
-        body = json.dumps(parsed, ensure_ascii=True, indent=2)
+        body = json.dumps(parsed, ensure_ascii=False, indent=2)
     else:
         body = _safe_str(parsed)
     return f"```json\n{body}\n```"