feat(FE): Add constants transformation utilities and API service

src/services/api/constants/constants.ts

@@ -0,0 +1,25 @@
+import { httpClient } from '@/services/http/client';
+import {
+  ConstantsApiResponse,
+  TransformedConstants,
+} from '@/types/api/constants/constants';
+import { transformConstants } from '@/lib/helper';
+
+class ConstantsApiService {
+  async fetchConstants(): Promise<ConstantsApiResponse | undefined> {
+    try {
+      const response = await httpClient<ConstantsApiResponse>('/constants');
+      return response;
+    } catch {
+      return undefined;
+    }
+  }
+
+  async fetchTransformedConstants(): Promise<TransformedConstants | undefined> {
+    const data = await this.fetchConstants();
+    if (!data) return undefined;
+    return transformConstants(data);
+  }
+}
+
+export const ConstantsApi = new ConstantsApiService();