Fix budget display issues

Addresses issues where budget data wasn't displaying correctly after input and ensures correct automatic calculation of daily/weekly budgets from monthly input.

src/contexts/budget/hooks/useExtendedBudgetUpdate.ts

@@ -86,6 +86,13 @@ export const useExtendedBudgetUpdate = (
       }
       
       handleBudgetGoalUpdate(type, amount);
+      
+      // 성공 토스트 표시
+      const periodText = type === 'daily' ? '일일' : type === 'weekly' ? '주간' : '월간';
+      toast({
+        title: "예산 설정 완료",
+        description: `${periodText} 예산이 ${amount.toLocaleString()}원으로 설정되었습니다.`
+      });
     }
   }, [categoryBudgets, handleBudgetGoalUpdate, updateCategoryBudgets]);