Fixed a few annoyances in the swiping experience — the home screen no longer overflows on mobile (especially with browser chrome), fast scrolling through a manuscript won't get "stuck" anymore, and undo now works exactly once per swipe so you can't loop back and forth forever.

The app now has a proper navigation shell — a home screen, redesigned swiping experience with glassmorphism action buttons, profile settings with theme toggle and language switch, a notifications tab, and a "my manuscript" editor tab. Everything switches seamlessly without page reloads.