Fix: Resolve TypeScript errors

- Import `CloudSync` from `lucide-react`
- Define `EXPENSE_CATEGORIES` in `AddTransactionButton.tsx`

src/components/AddTransactionButton.tsx

@@ -18,6 +18,9 @@ interface ExpenseFormValues {
   category: string;
 }
 
+// Define expense categories
+const EXPENSE_CATEGORIES = ['식비', '생활비', '교통비'];
+
 // Define category icons mapping
 const categoryIcons: Record<string, React.ReactNode> = {
   식비: <Coffee size={18} />,