fix(a11y): fix remaining unlabeled icon buttons and portaled tooltip issue\n\nCo-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/components/emoji-board/components/Sidebar.tsx

@@ -61,7 +61,7 @@ function SidebarBtn<T extends string>({
       delay={500}
       position="Left"
       tooltip={
-        <Tooltip id={`SidebarStackItem-${id}-label`}>
+        <Tooltip>
           <Text size="T300">{label}</Text>
         </Tooltip>
       }
@@ -69,7 +69,7 @@ function SidebarBtn<T extends string>({
       {(ref) => (
         <IconButton
           aria-pressed={active}
-          aria-labelledby={`SidebarStackItem-${id}-label`}
+          aria-label={label}
           ref={ref}
           onClick={() => onClick(id)}
           size="400"