fix: store uploaded logo as base64 in the database to support persistent storage and HTTPS domain routing in Next.js production builds

prisma/schema.prisma

@@ -74,6 +74,6 @@ model BookingSeat {
 model SystemSetting {
   id    Int    @id @default(autoincrement())
   key   String @unique
-  value String @db.Text
+  value String @db.LongText
 }