🎨 Palette: 의미 없는 장식용 아이콘에 aria-hidden 속성 추가

packages/web/src/components/dashboard/event-list.tsx

@@ -179,6 +179,7 @@ function RowView({
       <span className="flex-1 min-w-0 flex items-center gap-1 text-sm text-muted-foreground">
         {chevron !== undefined && (
           <ChevronRight
+            aria-hidden="true"
             className={cn(
               "h-3 w-3 shrink-0 transition-transform",
               chevron === "expanded" && "rotate-90",

packages/web/src/components/dashboard/reports/context-section.tsx

@@ -31,9 +31,9 @@ export function ContextSection({ title, children, defaultOpen = false }: Context
       >
         <h2 className="text-base font-medium">{title}</h2>
         {open ? (
-          <ChevronUp className="h-4 w-4 text-muted-foreground" />
+          <ChevronUp aria-hidden="true" className="h-4 w-4 text-muted-foreground" />
         ) : (
-          <ChevronDown className="h-4 w-4 text-muted-foreground" />
+          <ChevronDown aria-hidden="true" className="h-4 w-4 text-muted-foreground" />
         )}
       </button>
       {open && (