Universal Load Controller

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- Added improved test log scrolling: the log now follows new entries automatically while still allowing manual scrolling.
- Firmware v1.1 now clearly explains manual setup with live monitoring, timing and logging support.
- Improved BLE compatibility for DL24 devices using the official FFE0/FFE1 BLE serial profile.
- Removed unsupported brightness/backlight controls and redundant legacy menu entries.
- Improved connection status feedback and start-test stability handling.