fix w js

static/js/user_expenses.js

@@ -44,6 +44,7 @@ document.addEventListener("DOMContentLoaded", function () {
                                         position: 'top',
                                         labels: {
                                             filter: function(legendItem, chart) {
+                                                if (!chart.data || !Array.isArray(chart.data.datasets)) return false;
                                                 const dataset = chart.data.datasets[legendItem.datasetIndex];
                                                 if (!dataset || !Array.isArray(dataset.data)) return false;
                                                 return dataset.data.some(val => !!val);