Add EUR currency support for international transactions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/api/v1/endpoints/transactions.py

@@ -194,7 +194,8 @@ def create_transaction(
     session.refresh(tx)
 
     # Send push notification
-    symbol = "₡" if tx.currency == Currency.CRC else tx.currency.value
+    symbols = {Currency.CRC: "₡", Currency.USD: "$", Currency.EUR: "€"}
+    symbol = symbols.get(tx.currency, tx.currency.value)
     amount_str = f"{symbol}{tx.amount:,.0f}" if tx.currency == Currency.CRC else f"{symbol}{tx.amount:,.2f}"
     is_deposit = tx.transaction_type == TransactionType.DEPOSITO
     send_push_to_all(

backend/app/db.py

@@ -23,6 +23,12 @@ def run_migrations():
         except Exception:
             conn.rollback()
 
+        try:
+            conn.execute(text("ALTER TYPE currency ADD VALUE IF NOT EXISTS 'EUR'"))
+            conn.commit()
+        except Exception:
+            conn.rollback()
+
 
 def get_session():
     with Session(engine) as session:

backend/app/models/models.py

@@ -35,6 +35,7 @@ class TransactionSource(str, enum.Enum):
 class Currency(str, enum.Enum):
     CRC = "CRC"
     USD = "USD"
+    EUR = "EUR"
     BTC = "BTC"
     XMR = "XMR"