test(v2): stabilize production E2E flows

apps/nextjs/src/app/[locale]/boards/(content)/_board-add-menu.tsx

@@ -48,7 +48,7 @@ export const BoardAddMenu = () => {
   return (
     <Menu position="bottom-end">
       <Menu.Target>
-        <HeaderButton w="auto" px={4}>
+        <HeaderButton w="auto" px={4} aria-label={t("board.action.addContent")}>
           <Group gap={4} wrap="nowrap">
             <IconPlus stroke={1.5} />
             <IconChevronDown color="gray" size={16} />

apps/nextjs/src/app/[locale]/boards/(content)/_header-actions.tsx

@@ -110,7 +110,9 @@ const EditModeMenu = ({ demoReadOnly }: { demoReadOnly: boolean }) => {
       <HeaderButton
         onClick={toggle}
         loading={isPending}
+        data-testid="board-edit-mode-toggle"
         aria-label={isEditMode ? commonT("common.action.save") : commonT("common.action.edit")}
+        aria-pressed={isEditMode}
         onFocus={preloadBoardAddMenu}
         onPointerEnter={preloadBoardAddMenu}
       >