feat: enhance locale handling and improve cookie management in Header component

fix: update CopyImport component to handle profile selection and data validation

feat: refactor EnkaImport component for better data parsing and error handling

fix: improve FreeSRImport component with enhanced data validation and error management

fix: update calcData helper functions to handle edge cases and improve robustness

refactor: enhance converter functions for better data handling and validation

feat: add validation to persisted stores using Zod schemas

fix: update Zustand stores to use validated JSON storage for improved data integrity

chore: add new Zod schemas for locale and connection persistence

fix: ensure proper handling of optional fields in various data structures

i18n/request.ts

@@ -1,11 +1,27 @@
 import { getRequestConfig } from "next-intl/server";
 import { cookies } from "next/headers";
 
+const supportedLocales = new Set([
+    "en",
+    "vi",
+    "ja",
+    "ko",
+    "zh",
+    "de",
+    "es",
+    "fr",
+    "id",
+    "pt",
+    "ru",
+    "th",
+]);
+
 export default getRequestConfig( async () => {
-    const locale = (await cookies()).get("MYNEXTAPP_LOCALE")?.value || "en";
+    const cookieLocale = (await cookies()).get("MYNEXTAPP_LOCALE")?.value;
+    const locale = cookieLocale && supportedLocales.has(cookieLocale) ? cookieLocale : "en";
 
     return {
         locale,
         messages: (await import(`../messages/${locale}.json`)).default
     }
-})
+})