The last wizard step (password) now shows an optional name field.
The name becomes the filename: <name>.wallet.json in the wallets
directory. Invalid filename characters are replaced with '_'.
If left empty, the existing auto-name logic applies (default.wallet.json,
wallet-2.wallet.json, …). If the chosen name already exists the wizard
shows an error instead of overwriting.
The name field is visually separated from the encryption section by a
distinct background panel and a horizontal divider.
davide
14ae39c5aa