fix(macos): hide overlay when mpv loses foreground and open stats inacti

- Add "active" Swift helper output when mpv is frontmost but geometry is temporarily unavailable, preserving overlay through transient tracker misses
- Use showInactive for overlay and stats window on macOS to avoid switching Spaces over fullscreen mpv
- Disable autoInstallOnAppQuit to prevent premature Squirrel install before user confirms restart

scripts/get-mpv-window-macos.test.ts

@@ -31,3 +31,44 @@ test('minimized Accessibility windows are validated by PID and socket before rep
     'target socket must be validated before accepting a minimized window',
   );
 });
+
+test('focused mpv window follows the frontmost mpv app signal', () => {
+  const focusHelperIndex = source.indexOf('private func isFocusedMpvWindow');
+  assert.notEqual(focusHelperIndex, -1);
+
+  const nextFunctionIndex = source.indexOf('\nprivate func ', focusHelperIndex + 1);
+  const focusHelperBody = source.slice(focusHelperIndex, nextFunctionIndex);
+
+  assert.ok(
+    focusHelperBody.includes('frontmost.pid == ownerPid'),
+    'matching frontmost PID should mark the mpv window focused',
+  );
+  assert.ok(
+    focusHelperBody.includes('frontmost.isMpv && windowHasTargetSocket(ownerPid)'),
+    'frontmost mpv app should mark the target mpv window focused even when PIDs differ',
+  );
+  assert.ok(
+    source.includes('focused: isFocusedMpvWindow(ownerPid: windowPid, frontmost: frontmost)'),
+    'Accessibility path should use the shared focused mpv helper',
+  );
+  assert.ok(
+    source.includes('focused: isFocusedMpvWindow(ownerPid: ownerPid, frontmost: frontmost)'),
+    'CoreGraphics path should use the shared focused mpv helper',
+  );
+});
+
+test('frontmost mpv app emits active state when geometry lookup misses', () => {
+  assert.ok(
+    source.includes('case active'),
+    'helper should expose an active state without window geometry',
+  );
+  assert.ok(
+    source.includes('frontmost.isMpv && windowHasTargetSocket(frontmost.pid)'),
+    'active state should be limited to the frontmost target mpv process',
+  );
+  assert.ok(
+    source.includes('return .active'),
+    'lookup should preserve active mpv state after geometry lookup misses',
+  );
+  assert.ok(source.includes('print("active")'), 'active state should be printed for the tracker');
+});