Smudge shared wall

Smudge is a shared drawing wall for two people. You and one other person share a single canvas: whatever you draw shows up on the other phone in real time, and every stroke fades away 24 hours after it was made. There is no account and no sign-in. Opening the app gives you a wall right away, plus an invite link — the first person who opens that link becomes your pair. What is worth testing in this build: - Drawing, colours and emoji on the wall, and that strokes actually reach the other device. - The Home Screen widget and the Lock Screen Live Activity, which mirror the wall outside the app. - A fresh install: onboarding, then pairing through an invite link. Known limits of this build: in-app purchase is not active on iOS yet, so the photo sticker cannot be unlocked. iOS has no live wallpaper, so the wall is shown through the widget and the Lock Screen instead.