Rename chart labels

Rename income/expense labels to budget/expense in monthly chart.

src/pages/Analytics.tsx

@@ -24,37 +24,38 @@ const Analytics = () => {
     color: '#81c784'
   }];
 
-  // Sample data for the monthly comparison
+  // Sample data for the monthly comparison - renamed income to budget
   const monthlyData = [{
     name: '3월',
-    income: 2400000,
+    budget: 2400000,
     expense: 1800000
   }, {
     name: '4월',
-    income: 2300000,
+    budget: 2300000,
     expense: 1700000
   }, {
     name: '5월',
-    income: 2700000,
+    budget: 2700000,
     expense: 1900000
   }, {
     name: '6월',
-    income: 2200000,
+    budget: 2200000,
     expense: 1500000
   }, {
     name: '7월',
-    income: 2500000,
+    budget: 2500000,
     expense: 1650000
   }, {
     name: '8월',
-    income: 2550000,
+    budget: 2550000,
     expense: 1740000
   }];
   
-  const totalIncome = 2550000;
+  // Updated variable names to match new terminology
+  const totalBudget = 2550000;
   const totalExpense = 1740000;
-  const savings = totalIncome - totalExpense;
+  const savings = totalBudget - totalExpense;
-  const savingsPercentage = Math.round(savings / totalIncome * 100);
+  const savingsPercentage = Math.round(savings / totalBudget * 100);
   
   // Custom formatter for Y-axis that removes currency symbol and uses K format
   const formatYAxisTick = (value: number) => {
@@ -104,7 +105,7 @@ const Analytics = () => {
                 currency: 'KRW',
                 notation: 'compact',
                 maximumFractionDigits: 1
-              }).format(totalIncome)}
+              }).format(totalBudget)}
               </p>
             </div>
             <div className="neuro-card">
@@ -146,7 +147,7 @@ const Analytics = () => {
                 <YAxis tickFormatter={formatYAxisTick} />
                 <Tooltip formatter={formatTooltip} />
                 <Legend />
-                <Bar dataKey="income" name="수입" fill="#81c784" radius={[4, 4, 0, 0]} />
+                <Bar dataKey="budget" name="예산" fill="#81c784" radius={[4, 4, 0, 0]} />
                 <Bar dataKey="expense" name="지출" fill="#e57373" radius={[4, 4, 0, 0]} />
               </BarChart>
             </ResponsiveContainer>