feat: Complete multilingual interface with 10 languages including Korean

🌍 Added complete translation files:
- 🇪🇸 Spanish (es.json) - Español
- 🇫🇷 French (fr.json) - Français
- 🇩🇪 German (de.json) - Deutsch
- 🇮🇹 Italian (it.json) - Italiano
- 🇵🇹 Portuguese (pt.json) - Português
- 🇨🇳 Chinese (zh.json) - 中文
- 🇯🇵 Japanese (ja.json) - 日本語

🔧 Updated LocalizationService:
- All 10 languages loaded and initialized
- Updated supported languages list
- Enhanced language detection

��️ Enhanced UI:
- Extended language selection menu with all 10 languages
- Updated language names mapping in controllers
- Proper flag emojis for each language

💡 Features:
- Native translations for all UI elements
- Cultural appropriate pricing displays
- Proper date/currency formatting per locale
- Korean language support with proper hangul characters

Ready for global deployment with comprehensive language support!

src/services/localizationService.ts

@@ -23,6 +23,14 @@ export class LocalizationService {
             const localesPath = path.join(__dirname, '..', 'locales');
             const ruTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'ru.json'), 'utf8'));
             const enTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'en.json'), 'utf8'));
+            const esTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'es.json'), 'utf8'));
+            const frTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'fr.json'), 'utf8'));
+            const deTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'de.json'), 'utf8'));
+            const itTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'it.json'), 'utf8'));
+            const ptTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'pt.json'), 'utf8'));
+            const zhTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'zh.json'), 'utf8'));
+            const jaTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'ja.json'), 'utf8'));
+            const koTranslations = JSON.parse(fs.readFileSync(path.join(localesPath, 'ko.json'), 'utf8'));
 
             await i18next.init({
                 lng: 'ru', // Язык по умолчанию
@@ -34,6 +42,30 @@ export class LocalizationService {
                     },
                     en: {
                         translation: enTranslations
+                    },
+                    es: {
+                        translation: esTranslations
+                    },
+                    fr: {
+                        translation: frTranslations
+                    },
+                    de: {
+                        translation: deTranslations
+                    },
+                    it: {
+                        translation: itTranslations
+                    },
+                    pt: {
+                        translation: ptTranslations
+                    },
+                    zh: {
+                        translation: zhTranslations
+                    },
+                    ja: {
+                        translation: jaTranslations
+                    },
+                    ko: {
+                        translation: koTranslations
                     }
                 },
                 interpolation: {
@@ -62,7 +94,7 @@ export class LocalizationService {
     }
 
     public getSupportedLanguages(): string[] {
-        return ['ru', 'en'];
+        return ['ru', 'en', 'es', 'fr', 'de', 'it', 'pt', 'zh', 'ja', 'ko'];
     }
 
     // Получить перевод для определенного языка без изменения текущего