feat(applicant): My Logistics shows assigned hotel + room

Replace the program-level hotel.findUnique (broken after removing @unique)
with the caller's HotelStay (include hotel) on their AttendingMember.
Returns hotel: {name,address,link,notes}|null and room: {roomNumber,
checkInAt,checkOutAt}|null. MyLogisticsCard renders the Room section
(number + Monaco-time check-in/out) when room is present.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/unit/applicant-my-logistics.test.ts

@@ -66,8 +66,16 @@ async function buildConfirmedFinalist() {
     },
   })
 
-  // Hotel for the program (1:1)
-  await prisma.hotel.create({
+  const attendee = await prisma.attendingMember.create({
+    data: {
+      confirmationId: confirmation.id,
+      userId: user.id,
+      needsVisa: true,
+    },
+  })
+
+  // Hotel for the program + HotelStay assigning the attendee to it
+  const hotel = await prisma.hotel.create({
     data: {
       programId: program.id,
       name: 'Hotel Hermitage',
@@ -77,11 +85,13 @@ async function buildConfirmedFinalist() {
     },
   })
 
-  const attendee = await prisma.attendingMember.create({
+  await prisma.hotelStay.create({
     data: {
-      confirmationId: confirmation.id,
-      userId: user.id,
-      needsVisa: true,
+      attendingMemberId: attendee.id,
+      hotelId: hotel.id,
+      roomNumber: '204',
+      checkInAt: new Date('2026-06-20T14:00:00Z'),
+      checkOutAt: new Date('2026-06-23T11:00:00Z'),
     },
   })
 
@@ -125,6 +135,9 @@ describe('applicant.getMyLogistics', () => {
       await prisma.flightDetail.deleteMany({
         where: { attendingMember: { confirmation: { project: { programId } } } },
       })
+      await prisma.hotelStay.deleteMany({
+        where: { attendingMember: { confirmation: { project: { programId } } } },
+      })
       await prisma.hotel.deleteMany({ where: { programId } })
       await prisma.attendingMember.deleteMany({
         where: { confirmation: { project: { programId } } },
@@ -154,6 +167,8 @@ describe('applicant.getMyLogistics', () => {
     expect(result!.confirmationStatus).toBe('CONFIRMED')
     expect(result!.hotel).not.toBeNull()
     expect(result!.hotel!.name).toBe('Hotel Hermitage')
+    expect(result!.room).not.toBeNull()
+    expect(result!.room!.roomNumber).toBe('204')
     expect(result!.myFlight).not.toBeNull()
     expect(result!.myFlight!.arrivalFlightNumber).toBe('AF1234')
     expect(result!.myFlight!.arrivalAirport).toBe('NCE')
@@ -227,6 +242,9 @@ describe('applicant.updateMyVisaNationality', () => {
       await prisma.flightDetail.deleteMany({
         where: { attendingMember: { confirmation: { project: { programId } } } },
       })
+      await prisma.hotelStay.deleteMany({
+        where: { attendingMember: { confirmation: { project: { programId } } } },
+      })
       await prisma.hotel.deleteMany({ where: { programId } })
       await prisma.attendingMember.deleteMany({
         where: { confirmation: { project: { programId } } },