Refactor Program.cs to use async Run method for improved performance. Update index.html to specify language attribute for accessibility. Enhance BumperTemplateEditor and ScheduleGrid components by replacing divs with buttons for better keyboard accessibility. Improve TemplatePreview sorting logic and optimize episode regex handling. Add close button to ToastItem for better user interaction. Update localization files to include 'close' translations. Refactor CardTitle to ensure screen reader compatibility by explicitly rendering children.

frontend/src/features/admin/channels/components/BumperTemplateEditor.tsx

@@ -80,11 +80,16 @@ export function BumperTemplateEditor({
 
   return (
     <div className="flex flex-col gap-3 rounded-md border border-border bg-muted/30 p-4">
-      <div
-        className="flex cursor-pointer items-center justify-between gap-2"
-        onClick={() => setOpen((o) => !o)}
-      >
-        <div className="flex flex-wrap items-center gap-2">
+      {/* Сворачивание висит на кнопке, а не на всей строке: кликабельный div недоступен с клавиатуры.
+          Кнопка удаления при этом вынесена наружу — вложенная кнопка внутри кнопки недопустима,
+          и заодно ей больше не нужен stopPropagation. */}
+      <div className="flex items-center justify-between gap-2">
+        <button
+          type="button"
+          onClick={() => setOpen((o) => !o)}
+          aria-expanded={open}
+          className="flex flex-1 cursor-pointer flex-wrap items-center gap-2 text-left"
+        >
           <ChevronDown
             className={`h-4 w-4 shrink-0 text-muted-foreground transition-transform ${open ? 'rotate-180' : ''}`}
           />
@@ -95,16 +100,13 @@ export function BumperTemplateEditor({
               ? `≈${Math.round(template.audioDurationSeconds)} ${t('admin.channels.bumperSeconds')}`
               : t('admin.channels.bumperDefaultDuration')}
           </span>
-        </div>
+        </button>
         {!template.isDefault && (
           <Button
             size="sm"
             variant="destructive"
             disabled={remove.isPending}
-            onClick={(e) => {
-              e.stopPropagation()
-              remove.mutate()
-            }}
+            onClick={() => remove.mutate()}
           >
             {t('common.delete')}
           </Button>