Close QVAC after GPU preflight

daemon/gpu-doctor.js

@@ -21,4 +21,20 @@ try {
 } catch (error) {
   console.error(`gpu-doctor: ${error.message}`);
   process.exitCode = 1;
+} finally {
+  // Resource discovery initializes QVAC handles even without loading a model.
+  // This one-shot command owns them and must close them before returning to
+  // first-run. Bound cleanup in case a native handle never settles.
+  const watchdog = setTimeout(() => {
+    console.error('gpu-doctor: QVAC cleanup timed out');
+    process.exit(1);
+  }, 5000);
+  try {
+    await Agent.engine.close();
+  } finally {
+    clearTimeout(watchdog);
+  }
+  // Bare addons may retain handles after close; this diagnostic has no more
+  // work to do. Never put this exit in the shared daemon/runtime lifecycle.
+  if (globalThis.Bare) Bare.exit(process.exitCode || 0);
 }