Fix analytics graph and toast

- Corrected analytics graph to only display budget data when budget is entered.
- Fixed issue where expense toast notifications were appearing twice.

src/components/AddTransactionButton.tsx

@@ -1,7 +1,8 @@
+
 import React, { useState } from 'react';
 import { PlusIcon } from 'lucide-react';
 import { Dialog, DialogContent, DialogHeader, DialogTitle } from './ui/dialog';
-import { toast } from '@/components/ui/use-toast';
+import { toast } from '@/hooks/use-toast';
 import { useBudget } from '@/contexts/BudgetContext';
 import { supabase } from '@/lib/supabase';
 import { isSyncEnabled } from '@/utils/syncUtils';
@@ -76,6 +77,7 @@ const AddTransactionButton = () => {
       // 브라우저 이벤트 발생시켜 다른 페이지에서도 업데이트되도록 함
       window.dispatchEvent(new Event('budgetDataUpdated'));
       window.dispatchEvent(new Event('transactionAdded'));
+      window.dispatchEvent(new Event('transactionUpdated'));
     } catch (error) {
       console.error('지출 추가 중 오류 발생:', error);
       toast({

src/components/analytics/MonthlyComparisonChart.tsx

@@ -45,7 +45,7 @@ const MonthlyComparisonChart: React.FC<MonthlyComparisonChartProps> = ({
   // 데이터 여부 확인 로직 개선 - 데이터가 비어있거나 모든 값이 0인 경우도 고려
   const hasValidData = monthlyData && 
                       monthlyData.length > 0 && 
-                      monthlyData.some(item => item.budget > 0 || item.expense > 0);
+                      monthlyData.some(item => (item.budget > 0 || item.expense > 0));
 
   return (
     <div className="neuro-card h-72 w-full">