Fix budget display and category issues

- Fix budget amount not displaying outside the homepage.
- Remove unexpected categories and revert to the original 3 categories.

src/components/transaction/TransactionFormFields.tsx

@@ -6,7 +6,7 @@ import { UseFormReturn } from 'react-hook-form';
 import { z } from 'zod';
 import { categoryIcons, EXPENSE_CATEGORIES } from '@/constants/categoryIcons';
 
-// Form schema for validation - 카테고리를 3개로 축소
+// Form schema for validation - 카테고리를 3개로 제한
 export const transactionFormSchema = z.object({
   title: z.string().min(1, '제목을 입력해주세요'),
   amount: z.string().min(1, '금액을 입력해주세요'),