Initial commit: SmoothSchedule multi-tenant scheduling platform

This commit includes:
- Django backend with multi-tenancy (django-tenants)
- React + TypeScript frontend with Vite
- Platform administration API with role-based access control
- Authentication system with token-based auth
- Quick login dev tools for testing different user roles
- CORS and CSRF configuration for local development
- Docker development environment setup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/i18n/index.ts

@@ -0,0 +1,62 @@
+/**
+ * i18n Configuration
+ * Internationalization setup using react-i18next
+ */
+
+import i18n from 'i18next';
+import { initReactI18next } from 'react-i18next';
+import LanguageDetector from 'i18next-browser-languagedetector';
+
+// Import translation files
+import en from './locales/en.json';
+import es from './locales/es.json';
+import fr from './locales/fr.json';
+import de from './locales/de.json';
+import pt from './locales/pt.json';
+import ja from './locales/ja.json';
+import zh from './locales/zh.json';
+
+export const supportedLanguages = [
+  { code: 'en', name: 'English', flag: '🇺🇸' },
+  { code: 'es', name: 'Español', flag: '🇪🇸' },
+  { code: 'fr', name: 'Français', flag: '🇫🇷' },
+  { code: 'de', name: 'Deutsch', flag: '🇩🇪' },
+  { code: 'pt', name: 'Português', flag: '🇧🇷' },
+  { code: 'ja', name: '日本語', flag: '🇯🇵' },
+  { code: 'zh', name: '中文', flag: '🇨🇳' },
+] as const;
+
+export type SupportedLanguage = typeof supportedLanguages[number]['code'];
+
+const resources = {
+  en: { translation: en },
+  es: { translation: es },
+  fr: { translation: fr },
+  de: { translation: de },
+  pt: { translation: pt },
+  ja: { translation: ja },
+  zh: { translation: zh },
+};
+
+i18n
+  .use(LanguageDetector)
+  .use(initReactI18next)
+  .init({
+    resources,
+    fallbackLng: 'en',
+    debug: false, // Disable debug logging
+
+    interpolation: {
+      escapeValue: false, // React already escapes values
+    },
+
+    detection: {
+      // Order of language detection
+      order: ['localStorage', 'navigator', 'htmlTag'],
+      // Cache user language preference
+      caches: ['localStorage'],
+      lookupLocalStorage: 'smoothschedule_language',
+    },
+  });
+
+export default i18n;