refactor: decouple core-storage services from static keys and update i18n setup to use configurable storage adapters

apps/landing/src/core/storage/index.ts

@@ -0,0 +1,15 @@
+import { createLocalStorage } from '@repo/core-storage';
+
+export const AppStorageKey = {
+  LOCALE: 'app_locale',
+} as const;
+
+export type AppStorageKeyValue = (typeof AppStorageKey)[keyof typeof AppStorageKey];
+
+export const PLAIN_KEYS = new Set<AppStorageKeyValue>([
+  AppStorageKey.LOCALE,
+]);
+
+export const secureStorage = createLocalStorage<AppStorageKeyValue>({
+  plainTextKeys: PLAIN_KEYS
+});

apps/landing/src/main.tsx

@@ -16,10 +16,16 @@ import './main.css';
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
 import { setupI18n } from '@repo/core-i18n';
+import { secureStorage, AppStorageKey } from './core/storage';
 import App from './app';
 
 async function bootstrap() {
-  await setupI18n();
+  await setupI18n({
+    storageAdapter: {
+      getLanguage: async () => await secureStorage.getItem<string>(AppStorageKey.LOCALE),
+      setLanguage: async (lng: string) => await secureStorage.setItem(AppStorageKey.LOCALE, lng),
+    },
+  });
 
   createRoot(document.getElementById('app')!).render(
     <StrictMode>