add payment, trust badge, handle race condition, fix booking schema

prisma/schema.prisma

@@ -8,13 +8,15 @@ datasource db {
 }
 
 model User {
-  id        String   @id @default(cuid())
-  name      String
-  email     String   @unique
-  password  String
-  image     String?
-  createdAt DateTime @default(now())
-  updatedAt DateTime @updatedAt
+  id         String   @id @default(cuid())
+  name       String
+  email      String   @unique
+  password   String
+  image      String?
+  /// Akun diverifikasi tim SeTrip (manual / admin) — tampil sebagai badge kepercayaan
+  isVerified Boolean  @default(false)
+  createdAt  DateTime @default(now())
+  updatedAt  DateTime @updatedAt
 
   trips          Trip[]
   participations TripParticipant[]
@@ -27,6 +29,14 @@ model Trip {
   description     String?
   mountain        String
   location        String
+  /// Titik kumpul / meeting point (teks bebas)
+  meetingPoint    String?
+  /// Itinerary hari per hari (teks bebas, bullet OK)
+  itinerary       String?
+  /// Yang termasuk harga (teks bebas)
+  whatsIncluded   String?
+  /// Yang tidak termasuk (teks bebas)
+  whatsExcluded   String?
   date            DateTime
   endDate         DateTime?
   maxParticipants Int
@@ -73,6 +83,10 @@ model TripParticipant {
   id        String            @id @default(cuid())
   status    ParticipantStatus @default(PENDING)
   createdAt DateTime          @default(now())
+  /// Peserta menekan "Saya sudah bayar" (pembayaran manual)
+  markedPaidAt          DateTime?
+  /// Organizer mengonfirmasi uang sudah masuk
+  paymentConfirmedAt    DateTime?
 
   tripId String
   trip   Trip @relation(fields: [tripId], references: [id])