UI cleanup

data_manager.py

@@ -309,7 +309,7 @@ class DataManager:
             print(f"Error deleting item: {e}")
             return False
 
-    def log_payment(self, items: list, total: float, balance_before: float, balance_after: float) -> bool:
+    def log_payment(self, items: list, total: float, balance_before: float, balance_after: float, buyer: str = '') -> bool:
         try:
             store = self.load_store()
             payments = store.get('payments', [])
@@ -317,6 +317,7 @@ class DataManager:
             payments.append({
                 'id': new_id,
                 'timestamp': datetime.now().isoformat(),
+                'buyer': buyer,
                 'items': items,
                 'total': round(total, 2),
                 'balance_before': round(balance_before, 2),