Fix Windows YouTube playback flow and overlay pointer tracking

src/main/runtime/startup-tray-policy.test.ts

@@ -0,0 +1,20 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { shouldEnsureTrayOnStartupForInitialArgs } from './startup-tray-policy';
+
+test('startup tray policy enables tray on Windows by default', () => {
+  assert.equal(shouldEnsureTrayOnStartupForInitialArgs('win32', null), true);
+});
+
+test('startup tray policy skips tray for direct youtube playback on Windows', () => {
+  assert.equal(
+    shouldEnsureTrayOnStartupForInitialArgs('win32', {
+      youtubePlay: 'https://www.youtube.com/watch?v=abc',
+    } as never),
+    false,
+  );
+});
+
+test('startup tray policy skips tray outside Windows', () => {
+  assert.equal(shouldEnsureTrayOnStartupForInitialArgs('linux', null), false);
+});