First phase of multi-wallet support: keep each wallet's data separate so loading
a different wallet no longer shows the previous one's data, and lay the metadata
groundwork for the wallet-files list.
- Address book scoped per wallet: AddressBookEntry gains a "scope" ("global" or a
wallet-identity hash); the Contacts tab shows global + current-wallet contacts
(App::activeWalletIdentityHash) with a "show in every wallet" toggle + globe
badge. Legacy entries migrate to "global". Scope-aware de-dup allows the same
address across different wallets.
- Wallet metadata index (data/wallet_index -> wallets.json): file-keyed cache of
balance / address count / identity / size / last-opened / synced-here, since
those can't be read off a wallet.dat without loading it. Populated on connect +
address refresh (change-detecting upsert). Plus an active_wallet_file setting
for the -wallet=<name> switch coming in P2.
Unit-tested (testAddressBookScope, testWalletIndex): migration, visibility filter,
scope-aware de-dup, upsert change-detection, save/reload round-trip.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
DanS
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