Add robust translation handling and safe template string method

🔧 Translation Improvements:
- Enhanced getTranslation() with better error checking
- Added t() method as safe alternative for template strings
- Added extra validation for translation key existence
- Better error logging for debugging translation issues

✅ Result: More robust translation system that handles edge cases

html/kidsai/script-new.js

@@ -146,15 +146,26 @@ class KidsAIExplorer {
     // Helper method to get translation for a key
     getTranslation(key) {
         try {
-            if (typeof translations !== 'undefined' && translations[this.currentLanguage]) {
+            if (typeof translations !== 'undefined' && translations[this.currentLanguage] && translations[this.currentLanguage][key]) {
                 return translations[this.currentLanguage][key];
             }
         } catch (error) {
-            console.warn('⚠️ Could not get translation for key:', key);
+            console.warn('⚠️ Could not get translation for key:', key, error);
         }
         return null;
     }
 
+    // Safe translation method for use in template strings
+    t(key, fallback = '') {
+        try {
+            const translation = this.getTranslation(key);
+            return translation || fallback;
+        } catch (error) {
+            console.warn('⚠️ Translation error for key:', key, error);
+            return fallback;
+        }
+    }
+
     switchLanguage(lang) {
         console.log('🔄 Switching language to:', lang);
         this.currentLanguage = lang;