Implementiere i18n für Frontend, Admin und Datenbank

prisma/schema.prisma

@@ -28,8 +28,8 @@ model Song {
 
 model Genre {
   id    Int    @id @default(autoincrement())
-  name  String @unique
-  subtitle String?
+  name  Json   // Multilingual: { "de": "Rock", "en": "Rock" }
+  subtitle Json? // Multilingual
   active   Boolean @default(true)
   songs Song[]
   dailyPuzzles DailyPuzzle[]
@@ -37,8 +37,8 @@ model Genre {
 
 model Special {
   id          Int           @id @default(autoincrement())
-  name        String        @unique
-  subtitle    String?
+  name        Json          // Multilingual
+  subtitle    Json?         // Multilingual
   maxAttempts Int           @default(7)
   unlockSteps String // JSON string: e.g. "[2, 4, 7, 11, 16, 30]"
   createdAt   DateTime      @default(now())
@@ -77,8 +77,8 @@ model DailyPuzzle {
 
 model News {
   id          Int      @id @default(autoincrement())
-  title       String
-  content     String   // Markdown format
+  title       Json     // Multilingual
+  content     Json     // Multilingual
   author      String?  // Optional: curator/admin name
   publishedAt DateTime @default(now())
   updatedAt   DateTime @updatedAt