fix(a11y): preserve decorative icon accessibility repair

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 className="h-4 w-4 text-muted-foreground" aria-hidden="true" />
         ) : (
-          <ChevronDown className="h-4 w-4 text-muted-foreground" />
+          <ChevronDown className="h-4 w-4 text-muted-foreground" aria-hidden="true" />
         )}
       </button>
       {open && (

packages/web/src/components/dashboard/reports/delegation-insight.tsx

@@ -15,7 +15,7 @@ export function DelegationInsight({ insight, orgSlug }: DelegationInsightProps)
       <ChartCard
         title={
           <span className="inline-flex items-center gap-2">
-            <Wand2 className="h-4 w-4 text-brand-2" />
+            <Wand2 className="h-4 w-4 text-brand-2" aria-hidden="true" />
             위임 활용
           </span>
         }
@@ -34,7 +34,7 @@ export function DelegationInsight({ insight, orgSlug }: DelegationInsightProps)
     <ChartCard
       title={
         <span className="inline-flex items-center gap-2">
-          <Wand2 className="h-4 w-4 text-brand-2" />
+          <Wand2 className="h-4 w-4 text-brand-2" aria-hidden="true" />
           위임 활용
         </span>
       }
@@ -65,7 +65,7 @@ export function DelegationInsight({ insight, orgSlug }: DelegationInsightProps)
                   className="inline-flex items-center gap-1 text-xs px-2 py-1 rounded-md bg-muted hover:bg-card-elevated transition-colors font-mono truncate max-w-[12rem]"
                 >
                   <span className="truncate">{sid.slice(0, 10)}…</span>
-                  <ArrowUpRight className="h-3 w-3 shrink-0" />
+                  <ArrowUpRight className="h-3 w-3 shrink-0" aria-hidden="true" />
                 </Link>
               ))}
             </div>

packages/web/src/components/dashboard/reports/learn-from-group.tsx

@@ -13,7 +13,7 @@ export function LearnFromGroup({ topUsers }: LearnFromGroupProps) {
     return (
       <div className="rounded-xl bg-card ring-1 ring-foreground/10 p-6">
         <div className="flex items-center gap-2 mb-2 text-brand">
-          <Trophy className="h-4 w-4" />
+          <Trophy className="h-4 w-4" aria-hidden="true" />
           <span className="text-sm font-medium">배울 대상</span>
         </div>
         <p className="text-sm text-muted-foreground">
@@ -26,33 +26,33 @@ export function LearnFromGroup({ topUsers }: LearnFromGroupProps) {
   return (
     <div>
       <div className="flex items-center gap-2 mb-3 text-brand">
-        <Trophy className="h-4 w-4" />
+        <Trophy className="h-4 w-4" aria-hidden="true" />
         <h3 className="text-sm font-medium">배울 대상</h3>
       </div>
       <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-3">
         <TopUserCard
-          icon={<Trophy className="h-4 w-4" />}
+          icon={<Trophy className="h-4 w-4" aria-hidden="true" />}
           label="스킬 활용 최다"
           leader={learnFrom.skillUsage}
           formatValue={(n) => `${n.toLocaleString()}회`}
           description="재사용 자산(스킬)을 가장 많이 호출"
         />
         <TopUserCard
-          icon={<Layers className="h-4 w-4" />}
+          icon={<Layers className="h-4 w-4" aria-hidden="true" />}
           label="스킬 다양성"
           leader={learnFrom.skillDiversity}
           formatValue={(n) => `${n}종`}
           description="고유 스킬을 가장 넓게 활용"
         />
         <TopUserCard
-          icon={<Wand2 className="h-4 w-4" />}
+          icon={<Wand2 className="h-4 w-4" aria-hidden="true" />}
           label="위임 최다"
           leader={learnFrom.delegation}
           formatValue={(n) => `${n.toLocaleString()}회`}
           description="Task/Agent 도구로 서브에이전트 위임"
         />
         <TopUserCard
-          icon={<MessageSquare className="h-4 w-4" />}
+          icon={<MessageSquare className="h-4 w-4" aria-hidden="true" />}
           label="간결 세션 마스터"
           leader={learnFrom.conciseSession}
           formatValue={(n) => `${n.toFixed(1)}회`}

packages/web/src/components/dashboard/reports/skill-assets-insight.tsx

@@ -11,7 +11,7 @@ export function SkillAssetsInsight({ insight }: SkillAssetsInsightProps) {
     <ChartCard
       title={
         <span className="inline-flex items-center gap-2">
-          <Sparkles className="h-4 w-4 text-brand" />
+          <Sparkles className="h-4 w-4 text-brand" aria-hidden="true" />
           재사용 자산
         </span>
       }

packages/web/src/components/dashboard/reports/usage-scale-group.tsx

@@ -15,19 +15,19 @@ export function UsageScaleGroup({ topUsers }: UsageScaleGroupProps) {
   return (
     <div>
       <div className="flex items-center gap-2 mb-3 text-brand-2">
-        <BarChart3 className="h-4 w-4" />
+        <BarChart3 className="h-4 w-4" aria-hidden="true" />
         <h3 className="text-sm font-medium">이번 주 활용 규모</h3>
       </div>
       <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
         <TopUserCard
-          icon={<Activity className="h-4 w-4" />}
+          icon={<Activity className="h-4 w-4" aria-hidden="true" />}
           label="세션 최다"
           leader={usageScale.sessionCount}
           formatValue={(n) => `${n.toLocaleString()} 세션`}
           tone="scale"
         />
         <TopUserCard
-          icon={<Coins className="h-4 w-4" />}
+          icon={<Coins className="h-4 w-4" aria-hidden="true" />}
           label="토큰 최다"
           leader={usageScale.tokenUsage}
           formatValue={(n) => formatTokens(n)}

packages/web/src/components/dashboard/reports/week-navigator.tsx

@@ -54,7 +54,7 @@ export function WeekNavigator({ currentIsoKey, label, isCurrent }: WeekNavigator
         aria-label="이전 주"
         className={cn(buttonVariants({ variant: 'outline', size: 'icon-sm' }))}
       >
-        <ChevronLeft className="h-4 w-4" />
+        <ChevronLeft className="h-4 w-4" aria-hidden="true" />
       </Link>
       <div className="flex items-center gap-2 px-3 py-1.5 rounded-md bg-muted">
         <span className="text-sm font-medium tabular-nums">{label}</span>
@@ -69,7 +69,7 @@ export function WeekNavigator({ currentIsoKey, label, isCurrent }: WeekNavigator
         aria-label="다음 주"
         className={cn(buttonVariants({ variant: 'outline', size: 'icon-sm' }))}
       >
-        <ChevronRight className="h-4 w-4" />
+        <ChevronRight className="h-4 w-4" aria-hidden="true" />
       </Link>
     </div>
   )