Feat: Add Turkish localization (tr) (#411)

frontend/src/components/ui/LanguageSwitch.tsx

@@ -11,7 +11,8 @@ const LanguageSwitch: React.FC = () => {
   const availableLanguages = [
     { code: 'en', label: 'English' },
     { code: 'zh', label: '中文' },
-    { code: 'fr', label: 'Français' }
+    { code: 'fr', label: 'Français' },
+    { code: 'tr', label: 'Türkçe' }
   ];
 
   // Update current language when it changes

frontend/src/i18n.ts

@@ -6,6 +6,7 @@ import LanguageDetector from 'i18next-browser-languagedetector';
 import enTranslation from '../../locales/en.json';
 import zhTranslation from '../../locales/zh.json';
 import frTranslation from '../../locales/fr.json';
+import trTranslation from '../../locales/tr.json';
 
 i18n
   // Detect user language
@@ -24,6 +25,9 @@ i18n
       fr: {
         translation: frTranslation,
       },
+      tr: {
+        translation: trTranslation,
+      },
     },
     fallbackLng: 'en',
     debug: process.env.NODE_ENV === 'development',