Fix onboarding and data issues

- Fix issue where welcome dialog reappears.
- Fix issue where new expenses are not reflected.
- Improve card layout on mobile devices.

src/pages/Analytics.tsx

@@ -9,10 +9,12 @@ import { useBudget } from '@/contexts/BudgetContext';
 import { formatCurrency } from '@/utils/formatters';
 import { EXPENSE_CATEGORIES } from '@/constants/categoryIcons';
 import { MONTHS_KR } from '@/hooks/useTransactions';
+import { useIsMobile } from '@/hooks/use-mobile';
 
 const Analytics = () => {
   const [selectedPeriod, setSelectedPeriod] = useState('이번 달');
   const { budgetData, getCategorySpending, transactions } = useBudget();
+  const isMobile = useIsMobile();
   
   // 실제 예산 및 지출 데이터 사용
   const totalBudget = budgetData.monthly.targetAmount;
@@ -98,7 +100,7 @@ const Analytics = () => {
   
   return (
     <div className="min-h-screen bg-neuro-background pb-24">
-      <div className="max-w-md mx-auto px-6">
+      <div className={`mx-auto px-4 ${isMobile ? 'w-full' : 'max-w-lg'}`}>
         {/* Header */}
         <header className="py-8">
           <h1 className="text-2xl font-bold neuro-text mb-5">지출 분석</h1>