Production deployment setup + feature complete

- Dockerfile + deploy.sh for Hetzner server
- Email verification via Better Auth + Resend
- Invite code flow (6-digit OTP, generate/join)
- Settlement share percent fix (payer vs debtor)
- OCR scanner fixes (date display, retry, viewfinder)
- app.json icon/splash/adaptive-icon configured
- iOS deployment target 15.5 (ML Kit requirement)
- DB migration 0014: household_invitations table

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/native/src/i18n/index.ts

@@ -0,0 +1,18 @@
+import i18n from 'i18next'
+import { initReactI18next } from 'react-i18next'
+import * as Localization from 'expo-localization'
+import de from './locales/de.json'
+import en from './locales/en.json'
+
+const deviceLanguage = Localization.getLocales()[0]?.languageCode ?? 'de'
+
+i18n
+  .use(initReactI18next)
+  .init({
+    resources: { de: { translation: de }, en: { translation: en } },
+    lng: deviceLanguage,
+    fallbackLng: 'de',
+    interpolation: { escapeValue: false },
+  })
+
+export default i18n