fix: implemented deep merge for admin translations to fix missing tab labels

src/i18n.ts

@@ -18,12 +18,31 @@ const i18n = createI18n({
   }
 });
 
+// Helper for deep merging locale objects
+const deepMerge = (target: any, source: any) => {
+  for (const key in source) {
+    if (source[key] instanceof Object && key in target) {
+      deepMerge(target[key], source[key]);
+    } else {
+      target[key] = source[key];
+    }
+  }
+};
+
 export const loadAdminTranslations = async (lang?: string) => {
   const targetLang = lang || (i18n.global as any).locale.value;
   try {
     // Dynamic import to keep admin translations in a separate chunk
     const messages = await import(`./locales/${targetLang}.admin.json`);
-    i18n.global.mergeLocaleMessage(targetLang, messages.default);
+    
+    // Use manual deep merge instead of i18n.global.mergeLocaleMessage
+    // because mergeLocaleMessage might be shallow at the root level in some versions/configs
+    const currentMessages = i18n.global.getLocaleMessage(targetLang);
+    const newMessages = messages.default;
+    
+    deepMerge(currentMessages, newMessages);
+    i18n.global.setLocaleMessage(targetLang, currentMessages);
+    
   } catch (error) {
     console.error(`Failed to load admin translations for ${targetLang}`, error);
   }