unlockFocus method
Unlocks focus to resume continuous autofocus.
Implementation
Future<void> unlockFocus() async {
_isFocusLocked = false;
notifyListeners();
if (_cameraController != null && _cameraController!.value.isInitialized) {
try {
await _cameraController!.setFocusMode(cam.FocusMode.auto);
} catch (e) {
debugPrint('Unlock focus failed: $e');
}
}
}