Fix: Ensure BudgetProvider usage

The `useBudget` hook was being called outside of the `BudgetProvider` context in the `Index` component. This commit ensures that the `Index` component and its children are wrapped with the `BudgetProvider` in `App.tsx` to resolve the error.

src/components/transaction/useTransactionEdit.ts

@@ -2,7 +2,7 @@
 import { useState, useRef, useEffect } from 'react';
 import { UseFormReturn, useForm } from 'react-hook-form';
 import { zodResolver } from '@hookform/resolvers/zod';
-import { Transaction } from '@/components/TransactionCard';
+import { Transaction } from '@/contexts/budget/types';
 import { useBudget } from '@/contexts/BudgetContext';
 import { toast } from '@/components/ui/use-toast';
 import { TransactionFormValues, transactionFormSchema, formatWithCommas } from './TransactionFormFields';