mainnet

Open an unfunded Nano account and self-send 1 raw from a local seed — checked on mainnet, 2026-11-11

The checked version of the obvious recipe: the exact RPC sequence, the account-open step, work generation without a node, local signing, explorer verification, and six failure modes hit on 2026-11-11 with their fixes. Includes a tested reference implementation that reproduces two real mainnet blocks.