fix: destroy charts when switching tabs

templates/index.html

@@ -180,6 +180,10 @@
       });
     }
 
+    function destroyAllCharts() {
+      Object.values(containers).forEach(destroyCharts);
+    }
+
     function loadReports() {
       let path;
       let container;
@@ -296,6 +300,7 @@
     }
 
     function switchTab(name) {
+      destroyAllCharts();
       currentTab = name;
       tabs.forEach(tab => {
         tab.classList.toggle('is-active', tab.dataset.tab === name);