Adjust card width for mobile

Adjust card width to fit mobile screens.

src/pages/Analytics.tsx

@@ -110,13 +110,15 @@ const Analytics = () => {
         
         {/* Category Pie Chart */}
         <h2 className="text-lg font-semibold mb-3">카테고리별 지출</h2>
-        {expenseData.some(item => item.value > 0) ? (
-          <ExpenseChart data={expenseData} />
-        ) : (
-          <div className="neuro-card h-52 flex items-center justify-center text-gray-400">
-            <p>데이터가 없습니다</p>
-          </div>
-        )}
+        <div className="w-full">
+          {expenseData.some(item => item.value > 0) ? (
+            <ExpenseChart data={expenseData} />
+          ) : (
+            <div className="neuro-card h-52 w-full flex items-center justify-center text-gray-400">
+              <p>데이터가 없습니다</p>
+            </div>
+          )}
+        </div>
         
         {/* Top Spending Categories */}
         <h2 className="text-lg font-semibold mb-3 mt-6">주요 지출 카테고리</h2>