Set anchor position and watch-circle; alert on drag. - [ ] Drop anchor at current GPS position (or manual pin) - [ ] Adjustable watch-circle radius (scope + depth input helper) - [ ] Drag trail visualization within circle - [ ] Foreground + background alarm (piggyback on existing background location task, per [docs/instruments.md](../../docs/instruments.md)) - [ ] Audible + haptic alert - [ ] Snooze / silence with confirmation - [ ] Log drag events to track - [ ] Publish to Signal K notifications API when connected
Set anchor position and watch-circle; alert on drag.