Sergei 5d40da0409 Add BLE permissions handling with graceful fallback
- Create permissions helper module with comprehensive error handling
- Update BLEManager to use new permission system
- Add permission state tracking in BLEContext
- Improve add-sensor screen with permission error banner
- Add "Open Settings" button for permission issues
- Handle Android 12+ and older permission models
- Provide user-friendly error messages for all states

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Co-Authored-By: Claude <noreply@anthropic.com>
2026-01-31 15:23:06 -08:00
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2026-01-29 10:57:43 -08:00