fix(dashboard): render money in the property's currency, not hardcoded USD

[modernitconsultants]

Running a property with currencyCode: 'JPY', every money value in the dashboard renders as US dollars — a ¥511,275 reservation shows as $511275.00.

Two defects, the second worse than the first

Display (18 sites). `$${Number(amount).toFixed(2)}` — a hardcoded symbol and hardcoded two decimal places, ignoring the currencyCode that is already on every record. For yen the decimals are wrong too: JPY has no minor unit, so the correct render is ¥511,275.

Writes (7 sites). currencyCode: 'USD' is hardcoded when creating rate plans, reservations, house accounts and ledger entries. On a non-USD property that writes incorrect data silently — a rate plan created through the UI on a yen property is stored as USD.

The root of both: PropertySummary doesn't carry currencyCode, so the dashboard has no way to know the property's currency even though the API returns it.

The change

• lib/money.ts — formatMoney / formatMoneyPlain via Intl.NumberFormat, so symbol, separators and fraction digits all derive from the ISO 4217 code. Unknown codes degrade to 1234.00 XYZ rather than a wrong symbol.
• currencyCode added to PropertySummary and exposed from PropertyContext. Portfolio mode falls back to the default deliberately — properties spanning currencies have no single answer, and asserting one property's code over others would be wrong.
• All 18 render sites and all 7 create sites routed through it.
• NightAudit's revenue helper is module-level so it takes the currency as a parameter rather than reaching for a hook.

Notes

Removed a local formatMoney shadow in Channels.tsx that duplicated the new shared helper.

You ship German, Portuguese, Spanish, French, Croatian, Italian and Serbian dashboard locales — this is the money half of that same internationalisation, and it currently blocks any non-USD operator.

Found running HAIP self-hosted for a property trading in yen.