Implement event feedback functionality: Add EventFeedback model to Prisma schema, enabling users to submit ratings and comments for events. Update EventsPageSection and AdminPanel components to support feedback management, including UI for submitting feedback and viewing existing feedbacks. Refactor registration logic to retrieve all user registrations for improved feedback handling.

prisma/schema.prisma

@@ -54,6 +54,7 @@ model User {
   updatedAt     DateTime  @updatedAt
   preferences   UserPreferences?
   eventRegistrations EventRegistration[]
+  eventFeedbacks EventFeedback[]
   
   @@index([score])
   @@index([email])
@@ -88,6 +89,7 @@ model Event {
   createdAt   DateTime    @default(now())
   updatedAt   DateTime    @updatedAt
   registrations EventRegistration[]
+  feedbacks EventFeedback[]
   
   @@index([date])
 }
@@ -105,6 +107,22 @@ model EventRegistration {
   @@index([eventId])
 }
 
+model EventFeedback {
+  id        String   @id @default(cuid())
+  userId    String
+  eventId   String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  event     Event    @relation(fields: [eventId], references: [id], onDelete: Cascade)
+  rating    Int      // Note de 1 à 5
+  comment   String?  // Commentaire optionnel
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  
+  @@unique([userId, eventId])
+  @@index([userId])
+  @@index([eventId])
+}
+
 model SitePreferences {
   id                    String   @id @default("global")
   homeBackground        String?