ibeancon mode

Add dual display modes and enhanced UI features

- Add Display Title setting with BLE/Membership mode selection
- Implement ViewType-based RecyclerView adapter supporting dual layouts
- Add item_membership_device.xml for simplified membership display
- Parse Service UUID to extract phone number and card number
- Add radio button group in settings for display mode selection
- Update BLEDeviceAdapter to support real-time display mode switching
- Enhance exit dialog to show confirmation when services are active
- Update documentation (README.md, CLAUDE.md) with new features

Features:
- BLE mode: Complete technical details for debugging
- Membership mode: Simplified "2200님 (1234 5678 9012 3456)" format
- Real-time mode switching without app restart
- Settings persistence via SharedPreferences

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

0820: Improve UI and fix BLE communication issues

- Remove unnecessary Master/Scan buttons, keep only Start/Advertise
- Fix -2500 timeout error by pausing scan before advertising
- Optimize RecyclerView updates to fix click event issues during scanning
- Add comprehensive error code handling for all AT API errors
- Add automatic scan resume after successful advertising
- Add toolbar with settings menu for beacon configuration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>