Fix Typescript and module errors

- Resolve Typescript isolatedModules error by using 'export type' when re-exporting types.
- Fix module ambiguity by explicitly re-exporting 'BudgetContextType'.
- Correct import paths for useAuth hook in transaction-related files.

src/hooks/transactions/deleteTransaction.ts

@@ -1,7 +1,7 @@
 
 import { useCallback, useRef, useEffect } from 'react';
 import { Transaction } from '@/components/TransactionCard';
-import { useAuth } from '@/contexts/auth/AuthProvider';
+import { useAuth } from '@/contexts/auth/useAuth';
 import { toast } from '@/hooks/useToast.wrapper';
 import { saveTransactionsToStorage } from './storageUtils';
 import { deleteTransactionFromServer } from '@/utils/sync/transaction/deleteTransaction';

src/hooks/transactions/transactionOperations/updateTransaction.ts

@@ -1,7 +1,7 @@
 
 import { useCallback } from 'react';
 import { Transaction } from '@/components/TransactionCard';
-import { useAuth } from '@/contexts/auth/AuthProvider';
+import { useAuth } from '@/contexts/auth/useAuth';
 import { toast } from '@/hooks/useToast.wrapper';
 import { saveTransactionsToStorage } from '../storageUtils';
 import { updateTransactionInSupabase } from '../supabaseUtils';