준비 화면에 뒤로 가기 버튼 추가

app/(game)/number-parentheses/NumberParenthesesClient.tsx

@@ -121,7 +121,7 @@ export default function NumberParenthesesClient() {
             </div>
           </fieldset>
 
-          <div>
+          <div className="flex flex-wrap gap-3">
             <Link
                 ref={startLinkRef}
                 href={`/number-parentheses/play?count=${selectedProblemCount}`}
@@ -130,6 +130,12 @@ export default function NumberParenthesesClient() {
             >
               연습 시작
             </Link>
+            <Link
+              href="/"
+              className="inline-flex h-12 items-center justify-center rounded-md border border-slate-300 bg-white px-6 text-base font-semibold text-slate-700 transition hover:bg-slate-100 focus:outline-none focus:ring-2 focus:ring-emerald-500 focus:ring-offset-2"
+            >
+              뒤로가기
+            </Link>
           </div>
         </div>
 

app/(game)/variable-parentheses/VariableParenthesesClient.tsx

@@ -125,7 +125,7 @@ export default function VariableParenthesesClient() {
             </div>
           </fieldset>
 
-          <div>
+          <div className="flex flex-wrap gap-3">
             <Link
                 ref={startLinkRef}
                 href={`/variable-parentheses/play?count=${selectedProblemCount}`}
@@ -134,6 +134,12 @@ export default function VariableParenthesesClient() {
             >
               연습 시작
             </Link>
+            <Link
+              href="/"
+              className="inline-flex h-12 items-center justify-center rounded-md border border-slate-300 bg-white px-6 text-base font-semibold text-slate-700 transition hover:bg-slate-100 focus:outline-none focus:ring-2 focus:ring-emerald-500 focus:ring-offset-2"
+            >
+              뒤로가기
+            </Link>
           </div>
         </div>