Fixes
- Fixed Android hardware back-button handling in the Angular shell. The native back button now closes open menus, clears note selection, saves/exits the note editor or mobile composer, closes the drawer, and only then falls back to normal route navigation or app exit.
- Fixed checklist scrolling on iOS and Android. Checklist row editors now distinguish deliberate taps from scroll gestures before focusing, preventing the system keyboard from opening while scrolling a checklist.