fix: route case-insensitive worker messages

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

tests/test_ptytap_integration.py

@@ -113,7 +113,7 @@ def test_real_pty_attributes_worker_output_and_suppresses_operator_echo(
         "print('READY', flush=True)\n"
         "for line in sys.stdin:\n"
         "    print(line.rstrip('\\r\\n'), flush=True)\n"
-        "    print('To:target: worker reply', flush=True)\n",
+        "    print('\\x1b[5;1H• tO:target: worker reply\\x1b[6;1H', flush=True)\n",
         encoding="utf-8",
     )
     bin_dir = tmp_path / "bin"