fix(i18n): merge hmr locale injection instead of discarding

Author: dvcol

src/stores/i18n.store.ts

@@ -32,8 +32,8 @@ export const useI18nStore = defineStore('i18n', () => {
     return result;
   };
 
-  const addLocale = (_locale: Locale, _lang = lang.value) => {
-    locales.value[_lang] = _locale;
+  const addLocale = (_locale: Locale, _lang = lang.value, merge = false) => {
+    locales.value[_lang] = merge ? { ...locales.value[_lang], ..._locale } : _locale;
     return locales.value;
   };
 

src/utils/i18n.utils.ts

@@ -13,7 +13,7 @@ export const initLocalI18n = () => {
     console.info('Listening to i18n HMR changes');
     import.meta.hot.send('fetch:i18n');
     import.meta.hot.on('update:i18n', (data: { lang: string; locale: Locale }[]) => {
-      data?.forEach(({ lang, locale }) => store.addLocale(locale, lang));
+      data?.forEach(({ lang, locale }) => store.addLocale(locale, lang, true));
     });
   } else if (!store.locales?.[store.lang]) {
     promise = fetch(new URL(`${router.baseUrl ?? './'}_locales/${store.lang}/messages.json`, new URL(import.meta.url).origin))