Streaming Watermark

1. You can now directly load a photo into the app by "sharing" it from the gallery.
(Video description: https://youtube.com/shorts/5W38FwR6WlE?si=10Qy8s4s5ZwISag1)
2. The issue with the photo orientation has been fixed.
3. The default watermark color has been changed to 'gray.'
4. Minor bugs have been fixed.
The iPhone version is also now available on the App Store, so please check it out and use it.
Thank you!