- UwbTagBleActivity: BLE scan filtered to 'UWB_TAG_XXXX' device names
- Connects to GATT service 12345678-1234-5678-1234-56789abcdef0
- Read/write JSON config char: sleep_timeout_s, display_brightness,
tag_name, uwb_channel, ranging_interval_ms, battery_report
- Subscribes to status + battery notification characteristics
- Material Design UI with scan list, config form, and live status
- Runtime BLE permission handling for API 26+ / API 31+
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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