test(web): expect a specific message when task scope cannot be resolved

The scope error now has its own copy, so the 4xx case should assert that text instead of the generic request-failed fallback.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/hooks/useTaskRunAttempts.test.ts

@@ -58,7 +58,7 @@ test('unknown 4xx business code is not reported as a network error', () => {
 
   const bare = buildNetworkErrorInfo(400, { errorCode: 'TASK_SCOPE_UNRESOLVED' });
   assert.equal(bare.code, 'TASK_SCOPE_UNRESOLVED');
-  assert.match(bare.userMessage, /请求失败/);
+  assert.match(bare.userMessage, /无法定位该文档任务的工作流阶段/);
   assert.equal(bare.userMessage.includes('请检查网络'), false);
 });