Patch the daemon gate in the persist-error scan test

The gate now runs before the setup dialog, so the unpatched test reached
the real readiness check and blocked forever on its modal prompt under
the offscreen platform — every full-suite hang today was this one test,
not the historical Qt font flake.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: jpietek

tests/test_ui_window_actions.py

@@ -183,6 +183,11 @@ def test_start_scan_switches_to_auto_uv_tab(win) -> None:
 
 def test_start_scan_gpu_persist_error(win) -> None:
     window, monkeypatch = win
+    monkeypatch.setattr(
+        window_mod,
+        "ensure_daemon_ready_for_privileged_action",
+        lambda **_kwargs: True,
+    )
     monkeypatch.setattr(window_mod, "select_scan_tuning", lambda **k: {"gpu_index": 0})
 
     def _boom(_idx):