Fix budget input and calculation

The budget input was not being saved correctly, and the daily/weekly calculations were not working as expected. This commit fixes these issues.

src/contexts/budget/hooks/useExtendedBudgetUpdate.ts

@@ -22,6 +22,12 @@ export const useExtendedBudgetUpdate = (
     // 카테고리 예산이 제공된 경우 업데이트
     if (newCategoryBudgets) {
       try {
+        // 교통비 값이 있으면 교통으로 통합
+        if (newCategoryBudgets['교통비'] && !newCategoryBudgets['교통']) {
+          newCategoryBudgets['교통'] = newCategoryBudgets['교통비'];
+          delete newCategoryBudgets['교통비'];
+        }
+        
         // 카테고리 예산 저장
         updateCategoryBudgets(newCategoryBudgets);