refactor(i18n): 사용자 문구 참조를 중앙화

src/features/plan-pill/ui/PlanPill.tsx

@@ -1,4 +1,5 @@
 import type { PlanTier } from '@/entities/plan';
+import { copy } from '@/shared/i18n';
 import { cn } from '@/shared/lib/cn';
 
 interface PlanPillProps {
@@ -20,7 +21,7 @@ export const PlanPill = ({ plan, onClick }: PlanPillProps) => {
           : 'border-white/20 bg-white/8 text-white/82 hover:bg-white/14',
       )}
     >
-      {isPro ? 'PRO' : 'Normal'}
+      {isPro ? copy.space.toolsDock.planPro : copy.space.toolsDock.planNormal}
     </button>
   );
 };