fix: ignore trace-frame terminal placeholders (#854)

Co-authored-by: Codex <codex@noreply.local>

scripts/src/hwlab-node-web-observe-collect.ts

@@ -195,7 +195,7 @@ function userMessageFor(items,prompt){
 function cleanFinalResponseText(text){
   const raw=String(text||'').trim();
   if(!raw) return '';
-  if(/^Code Agent$/iu.test(raw)) return '';
+  if(/^Code Agent\\s*(?:running|completed|failed|canceled|cancelled)?$/iu.test(raw)) return '';
   if(/Code Agent\\s*耗时[\\s\\S]*运行记录/iu.test(raw)) return '';
   if(/^sent\\s+当前 AgentRun 请求已取消/u.test(raw)) return '';
   if(/^(admitted|run|ok|error)\\s+/iu.test(raw)) return '';