Enhance user profiles with character class feature: Add character class field to user model and update related API routes, UI components, and validation logic. This update improves user profile customization and leaderboard entries by allowing users to select and display their character class.

prisma/schema.prisma

@@ -28,6 +28,19 @@ enum EventStatus {
   PAST
 }
 
+enum CharacterClass {
+  WARRIOR
+  MAGE
+  ROGUE
+  RANGER
+  PALADIN
+  ENGINEER
+  MERCHANT
+  SCHOLAR
+  BERSERKER
+  NECROMANCER
+}
+
 model User {
   id            String    @id @default(cuid())
   email         String    @unique
@@ -42,6 +55,7 @@ model User {
   maxXp         Int       @default(5000)
   avatar        String?
   bio           String?
+  characterClass CharacterClass?
   createdAt     DateTime  @default(now())
   updatedAt     DateTime  @updatedAt
   preferences   UserPreferences?