Add currency dropdown and deposit field to add property form

- Added getCurrencies() API function for /Currency/GetAll
- Currency dropdown fetched on mount, populated with available currencies
- Added deposit input field (مبلغ الضمان)
- CurrencyId sent in RentPropertyDto instead of hardcoded 1

app/utils/api.js

@@ -179,6 +179,12 @@ export async function addRentProperty(data) {
   });
 }
 
+// ─── Currencies ───
+
+export async function getCurrencies() {
+  return apiFetch('/Currency/GetAll');
+}
+
 // ─── Auth: Registration ───
 
 /**