fix(ui): fix error messages displayed beneath export modal

Author: oatmealproblem

src/renderer/src/App.svelte

@@ -25,7 +25,7 @@
 	const modalStore = getModalStore();
 </script>
 
-<Toast position="t" background="variant-filled-error" />
+<Toast position="t" background="variant-filled-error" class="!z-[1000]" />
 <Modal components={{ export: { ref: ExportModal }, settings: { ref: AppSettingsModal } }} />
 <AppShell slotPageContent="h-full" regionPage="h-full">
 	<svelte:fragment slot="header">