- netstate.home_plmn(): the card's home network — EF.HPLMNwAcT first
record (the HPLMN per TS 31.102 4.2.5), falling back to the IMSI with a
2-digit MNC. Exposed as state.network.home in /api/net-state.
- The net-sim parameters get a Home network button next to Random roaming
operator: it fills MCC/MNC and reports the source (EF.HPLMNwAcT/IMSI).
- The monitor's HPLMNwAcT row now shows only the first network (code
only) plus a '… +N' counter; the tooltip keeps the full decoded list
with the access technologies.
- tests: netstate home_plmn cases, netsim button handler, updated
netstate expectations; help EN/RU.