Release-Vorbereitung: Proxy, Kostenoptimierung, Freemium, Store-Assets

- Backend-Proxy (Cloudflare Worker in proxy/): API-Key serverseitig,
  Modell-Whitelist, max_tokens-Deckel, Tageslimits pro Gerät und IP
- Modell-Split: Analyse auf Sonnet 5, Übersetzung/Antwort auf Haiku 4.5
- Bild-Downscaling auf 2000px vor dem Upload (ScanScreen)
- Expo SDK 56 -> 57 Upgrade
- Freemium: 3 Gratis-Analysen mit lokalem Zähler und Paywall-Hinweis
- Einstellungen: API-Key-Feld nur noch im Dev-Modus (NUTZT_PROXY)
- Build-Setup: Bundle-IDs, eas.json, Splash-Screen-Plugin
- Tests: jest-expo + 17 Tests für die Ampel-/Fristlogik
- Rechtliches: Datenschutzerklärung (Entwurf), Webseite (webseite/,
  live auf behoerdenklar.pages.dev), Store-Texte (store/)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package.json

@@ -6,34 +6,43 @@
     "@react-native-async-storage/async-storage": "2.2.0",
     "@react-navigation/native": "^7.3.8",
     "@react-navigation/native-stack": "^7.17.10",
-    "expo": "^56.0.15",
-    "expo-calendar": "~56.0.9",
-    "expo-camera": "~56.0.8",
-    "expo-document-picker": "~56.0.4",
-    "expo-file-system": "~56.0.8",
-    "expo-image-picker": "~56.0.20",
-    "expo-network": "~56.0.5",
-    "expo-notifications": "~56.0.20",
-    "expo-print": "~56.0.4",
-    "expo-secure-store": "~56.0.4",
-    "expo-sharing": "~56.0.21",
-    "expo-speech": "~56.0.3",
-    "expo-status-bar": "~56.0.4",
+    "expo": "^57.0.0",
+    "expo-calendar": "~57.0.0",
+    "expo-camera": "~57.0.1",
+    "expo-document-picker": "~57.0.0",
+    "expo-file-system": "~57.0.0",
+    "expo-image-manipulator": "~57.0.2",
+    "expo-image-picker": "~57.0.2",
+    "expo-network": "~57.0.0",
+    "expo-notifications": "~57.0.3",
+    "expo-print": "~57.0.0",
+    "expo-secure-store": "~57.0.0",
+    "expo-sharing": "~57.0.3",
+    "expo-speech": "~57.0.0",
+    "expo-splash-screen": "~57.0.2",
+    "expo-status-bar": "~57.0.0",
     "react": "19.2.3",
-    "react-native": "0.85.3",
+    "react-native": "0.86.0",
     "react-native-safe-area-context": "~5.7.0",
     "react-native-screens": "4.25.2",
     "zustand": "^5.0.14"
   },
   "devDependencies": {
+    "@types/jest": "~29.5.14",
     "@types/react": "~19.2.2",
+    "jest": "~29.7.0",
+    "jest-expo": "~57.0.1",
     "typescript": "~6.0.3"
   },
   "scripts": {
     "start": "expo start",
     "android": "expo start --android",
     "ios": "expo start --ios",
-    "web": "expo start --web"
+    "web": "expo start --web",
+    "test": "jest"
+  },
+  "jest": {
+    "preset": "jest-expo"
   },
   "private": true
 }