fix: improve error handling for CSV import in upload and ScheduleView

backend/controllers/matchController.js

@@ -16,7 +16,9 @@ export const uploadCSV = async (req, res) => {
         });
     } catch (error) {
         console.error('Error importing CSV:', error);
-        return res.status(500).json({ error: 'Failed to import CSV data' });
+        return res.status(500).json({
+            error: error.message || 'Failed to import CSV data'
+        });
     }
 };