feat: add CATEGORIES constant

- Add categories array with id and label
- Use for consistent category options

types/index.ts

@@ -12,3 +12,15 @@ export interface BalanceInfo {
   income: number;
   expense: number;
 }
+
+export const CATEGORIES = [
+  { id: 'makanan', label: 'Makanan' },
+  { id: 'transport', label: 'Transport' },
+  { id: 'belanja', label: 'Belanja' },
+  { id: 'hiburan', label: 'Hiburan' },
+  { id: 'kesehatan', label: 'Kesehatan' },
+  { id: 'pendidikan', label: 'Pendidikan' },
+  { id: 'investasi', label: 'Investasi' },
+  { id: 'gaji', label: 'Gaji' },
+  { id: 'lainnya', label: 'Lainnya' },
+] as const;