feat(lite): per-address balances from unspent notes/utxos

applyLiteRefreshModelToWalletState now derives each address's balance by summing its unspent
notes/utxos (excluding spent and unconfirmed-spent outputs) instead of the aggregate-only
zeros, so the Receive/Balance UI shows per-address amounts. The notes parser shape is
confirmed against do_list_notes in the backend source.

testLitePerAddressBalances covers the summing + spent-exclusion. Completes M2.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/lite-wallet-implementation-plan-v2-2026-06-04.md

@@ -107,7 +107,9 @@ Each milestone is independently demoable and gated by a fake-backend test. Order
 > - `list` (`do_list_transactions`): send records carry `outgoing_metadata` (no top-level `address`), receives carry `address`+`amount`; our `parseTransactionRecord` branches on `outgoing_metadata` first — **matches** both.
 > - `syncstatus`: was the one mismatch — fixed earlier.
 >
-> - ⏳ **Remaining for M2 polish:** per-address balances (notes-correlation; currently aggregate-only). Real *data* (vs shape) hasn't been observed end-to-end because a full sync takes ~30 min; shapes are confirmed, and gateway hardening covers any residual surprise.
+> - ✅ **Per-address balances done.** `applyLiteRefreshModelToWalletState` now sums unspent notes/utxos per address (spent/unconfirmed-spent excluded) into `AddressInfo::balance`, replacing the aggregate-only zeros — so Receive/Balance show per-address amounts. Notes parser confirmed against `do_list_notes` (source). Covered by `testLitePerAddressBalances()`.
+>
+> **M2 is complete.** Remaining only: real *data* (vs shape) hasn't been observed end-to-end because a full sync takes ~30 min; all shapes are confirmed and gateway hardening covers any residual surprise. Next milestone: M3 (UI completeness).
 - Implement `LiteSyncService::startSync` (replace the "not implemented" stub) + a background worker polling `syncstatus`, mirroring `NetworkRefreshService`/`RefreshScheduler` (enqueue → worker → apply on main thread).
 - Drive `LiteWalletGateway` refresh (info/height/balance/addresses/notes/list/transactions) through `lite_result_parsers` → `lite_wallet_state_mapper` → `App` `WalletState` (`privateBalance`, `transparentBalance`, `addresses`, `transactions`, `sync`).
 - Hook the controller into `App::update()`'s refresh dispatch alongside (not inside) the full-node path.