v0.1.8-beta — clear network indicator

The network (mainnet / stagenet) follows your address — there's no separate toggle. This makes that obvious:

• a read-only Network badge on the settings page (shows mainnet / stagenet / testnet),
• a hint in the setup wizard, and a note on the address field,
• documented in the README (plugin + library).

To go live: swap the address, view key and node to your mainnet ones.