v1.0.57 — Map FABs + Location Fix

NEW: Add Spot & Add Shop buttons on map
- Two always-visible pill buttons in the bottom-left of the map
- Red "+ Add Spot" and green "+ Add Shop" — both clear of the bottom nav
- No more buttons hidden behind or overlapping the navigation bar

FIXED: Near Me location denied
- Tapping the red location icon now opens a step-by-step help dialog
- Instructions for Android Chrome, iOS Safari, desktop Chrome, and Firefox
- Previously showed a useless disappearing toast with no actionable steps
