Replace the bare "land on main UI with a No-wallet overlay" first-run with a
lite welcome modal, shown when no wallet file exists yet (lite_wallet_ present,
not open, walletExists() false):
- "Create new wallet" — one-click createWallet({}); on success, notifies the user
to back up their recovery phrase and navigates to Settings (Backup & keys),
where the seed can be revealed/copied via the existing backup UI.
- "Restore from seed" — navigates to Settings (Lite wallet request → Restore).
- "Later" — dismiss for the session.
Routes to the already-built + verified create/restore/backup flows rather than
re-implementing seed display in the modal (no new secret-handling surface).
Dismissed once an action is chosen; never shown again once a wallet exists.
Full-node is unaffected (renderLiteFirstRunPrompt() returns early when
lite_wallet_ is null). English i18n built-ins added.
Verified: fresh-HOME lite launch shows the prompt, clean run + shutdown, no
crash/RPC noise; tests pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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