Separate retention settings for images and videos in Paste history

Images and videos can quickly consume a large amount of storage in Paste, even though many of them are only needed temporarily. I suggest adding a dedicated history retention setting specifically for image and video items.

Users could choose how long unpinned images and videos remain in their Paste history (e.g. 1 day, 7 days, 30 days), after which they would be automatically deleted. Pinned items would, of course, be excluded.

The existing history retention setting for all other clipboard content should remain unchanged. This would give users much better control over storage usage without affecting their normal clipboard history.