Greasy Fork

* Improved performance and code readability with a function restructure.
* Added default image loading: displays a default image when no saved image is available and loads the saved image when present (avoids stacking styles).
* Enhanced local storage handling for saving settings.
* Fixed background and color issues in the chat.
* Implemented a new settings design.
* Added functionality to disable/enable the converter download button.
* Improved "Ambient mode" removal for those causing transparency glitches.
* Introduced a notification for settings saving.

- Disabled cinematic/ambient mode.
- Added option to change the background image of YouTube live chat.
- Made minor color fixes.