currency: a wallet row's amount is AUD, so show its native figure, not the AUD one under a foreign label

Wallet rows store the provisional AUD figure in amount and amount_aud and the
native figure in foreign_currency_amount. NATIVE_CURRENCY labelled every
statement-less row with foreign_currency_code (the order-lane convention,
where amount IS native and amount_aud is NULL), so an INR 524 tap rendered as
"$9.42 / INR 9.42" (txn 8162).

amount_aud being present now marks amount as AUD. Measured live: exactly the
38 foreign wallet rows change label, nothing else. The transactions list's
second line prints foreign_currency_amount where one exists, which also
surfaces the native figure on statement rows that carry one.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/__tests__/integration/analytics-sql.test.ts

@@ -105,6 +105,19 @@ describe("NATIVE_CURRENCY", () => {
     expect(unconverted).toBe(true);
   });
 
+  it("labels a statement-less wallet row AUD, because its amount already is", async () => {
+    // Wallet rows store a provisional AUD figure in amount AND amount_aud, and
+    // the native figure in foreign_currency_amount. Reading the foreign code
+    // here printed "INR 9.42" for an INR 524 tap (txn 8162).
+    const id = await scratchTxn(
+      "transaction_date, description, amount, amount_aud, transaction_type, payment_method, source, source_ref, foreign_currency_amount, foreign_currency_code",
+      "'2026-10-03','Wallet foreign fixture', 9.42, 9.42, 'debit', 'card', 'wallet', 'evt:fixture-native-ccy', 524.00, 'INR'"
+    );
+    const { ccy, unconverted } = await currencyOf(id);
+    expect(ccy).toBe("AUD");
+    expect(unconverted).toBe(false);
+  });
+
   it("prefers the statement's currency over the foreign-charge record", async () => {
     // Opposite convention: on an AUD statement, `amount` is AUD and
     // foreign_currency_code merely notes what was originally charged. Reading