test(gateway): cover capability-gated approval IDs

tests/test_gateway_approval_legacy_path.py

@@ -374,7 +374,7 @@ def test_legacy_approval_records_run_id_for_response_relay():
         assert captured.get("url", "") == "http://gw:8642/v1/runs/run-legacy-1/approval", (
             f"approval respond must relay to the gateway run; got {captured.get('url')!r}"
         )
-        assert captured["body"] == {"choice": "once", "approval_id": "appr-legacy-runid"}
+        assert captured["body"] == {"choice": "once", "approval_id": ""}
         handler.send_response.assert_called_with(200)
     finally:
         with STREAMS_LOCK:
@@ -697,7 +697,7 @@ def test_mirrored_run_id_survives_active_stream_loss():
         assert captured.get("url", "") == f"http://gw:8642/v1/runs/{run_id}/approval", (
             f"approval respond must relay to the mirrored gateway run; got {captured.get('url')!r}"
         )
-        assert captured["body"] == {"choice": "once", "approval_id": approval_id}
+        assert captured["body"] == {"choice": "once", "approval_id": ""}
         handler.send_response.assert_called_with(200)
         assert entry.event.is_set(), "mirrored gateway approval was not resolved"
         assert entry.result == "once"

tests/test_gateway_approval_runs_api.py

@@ -305,7 +305,15 @@ def test_gateway_approval_event_translation():
     assert result["run_id"] == "run-999"
     assert result["approval_id"] == "appr-1"
     empty_id = _gateway_runs_approval_event({**payload, "approval_id": "", "id": ""})
-    assert empty_id["approval_id"] == ""
+    import api.route_approvals as approvals
+    sid = "translation-empty-id"
+    try:
+        approvals.submit_gateway_pending_mirror(sid, empty_id)
+        mirror = approvals.gateway_pending_mirror(sid, run_id="run-999")
+        assert mirror["approval_id"]
+        assert mirror.get("_gateway_agent_identity_v1") is not True
+    finally:
+        approvals._pending.pop(sid, None)
 
     downgraded = _gateway_runs_approval_event({
         "command": "rm -rf /tmp/x",