Renames the Hardware section to Amplifier and adds an amplifier-type selector (4O3A PowerGenius XL, SPE Expert 1.3K-FA / 1.5K-FA / 2K-FA) plus a transport choice for the SPE amps: USB (serial COM + baud) or Network (RS232-to-Ethernet IP:port). PGXLSettings gains Type/Transport/ComPort/Baud (keys keep the pgxl.* prefix for back-compat). PowerGenius still drives over TCP; SPE settings are stored but control is not wired yet (needs the SPE serial protocol).