Fix transaction delete type mismatch

The TransactionsContent component's onTransactionDelete prop was expecting a function that returns a boolean or a Promise<boolean>, but was receiving a function that returns void. This commit updates the type definition to match the expected return type.

src/components/transactions/TransactionsContent.tsx

@@ -13,7 +13,7 @@ interface TransactionsContentProps {
   searchQuery: string;
   selectedMonth: string;
   setSearchQuery: (query: string) => void;
-  onTransactionDelete: (id: string) => void;
+  onTransactionDelete: (id: string) => Promise<boolean> | boolean;
   isDisabled: boolean;
 }