- szPCName sent as "model/groupName" format matching Linux client
- CMD_SET_GROUP handler updates g_SETTINGS.szGroupName in memory
- Group name persisted to filesDir/yama_group; survives process restart
- LoadGroupName() at startup overrides build-time patch value if file exists
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>