feat: add daily challenge and blitz mode (2min speedrun)

prisma/schema.prisma

@@ -15,14 +15,15 @@ model User {
   email     String   @unique
   password  String
   createdAt DateTime @default(now())
-  games     Game[]
+  games        Game[]
+  dailyResults DailyResult[]
 }
 
 model Game {
   id          String   @id @default(cuid())
   userId      String
   user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
-  mode        String   // "solo" | "multi"
+  mode        String   // "solo" | "multi" | "daily" | "blitz"
   startArticle String
   targetArticle String
   path        String   // JSON array de titres
@@ -33,3 +34,27 @@ model Game {
 
   @@index([userId])
 }
+
+model DailyPuzzle {
+  id            String        @id @default(cuid())
+  date          String        @unique // "YYYY-MM-DD"
+  startArticle  String
+  targetArticle String
+  results       DailyResult[]
+}
+
+model DailyResult {
+  id            String      @id @default(cuid())
+  puzzleId      String
+  puzzle        DailyPuzzle @relation(fields: [puzzleId], references: [id], onDelete: Cascade)
+  userId        String
+  user          User        @relation(fields: [userId], references: [id], onDelete: Cascade)
+  path          String      // JSON
+  clicks        Int
+  timeSeconds   Float
+  won           Boolean
+  playedAt      DateTime    @default(now())
+
+  @@unique([puzzleId, userId])
+  @@index([puzzleId])
+}