Set timeout during loading to prevent a calendar from blocking the view

src/App.svelte

@@ -122,6 +122,10 @@
       if (spinner) {
         spinner.$set({ isLoading: b });
       }
+
+      setTimeout(() => {
+        spinner.$set({ isLoading: false });
+      }, 3000);
     },
     eventSources: [],
     themeSystem: 'bootstrap5',