New Features - History Search & Filter - Search check-in history by guest name, filter by success/failed, with pagination for large lists - Audio Feedback - Success and fail sounds play on scan results for clear feedback without looking at the screen - Sites Persistence - Selected location and available sites now persist across app restarts and force closes Improvements - Auto-select first site when none is selected or current selection becomes invalid - Improved error handling for API responses with nested status codes - Better handling of scan failures - Fixed header safe areas on devices with notches/dynamic islands Bug Fixes - Fixed "No sites available" appearing after force close - Fixed scanner defaulting to hardcoded site ID when no location selected - Fixed API error messages not displaying properly to users