add end date and create logo and fix filter

prisma/migrations/20260416165210_add_end_date/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Trip" ADD COLUMN     "endDate" TIMESTAMP(3);

prisma/schema.prisma

@@ -27,6 +27,7 @@ model Trip {
   mountain        String
   location        String
   date            DateTime
+  endDate         DateTime?
   maxParticipants Int
   price           Int
   status          TripStatus @default(OPEN)