1. Sticker pack toolbar is now at the bottom of the "sticker keyboard" in chat.
2. Sticker pack toolbar is now "floating" in a a glass panel on iOS 26, both in sticker keyboard in chat and in full-screen sticker picker in media editor.
3. There's some helper text when "recent stickers" panel is empty.
Creating a UIImageView outside a view hierarchy now crashes on iOS 18. We can
avoid this offscreen rendering technique by removing UIImage.asTintedImage(),
configuring the tint colour and template rendering on the UIImage directly, and
rendering with UIGraphicsImageRenderer instead of lower-level Core Graphics
APIs.
