feat: logistics page shell + Confirmations/Travel/Hotels tabs

- /admin/logistics page with shadcn Tabs (3 active + 5 disabled "(soon)"
  placeholder tabs for Visas / Lunch / Documents / Email Templates / Settings).
- Sidebar entry "Logistics" between Mentors and Awards (Plane icon).
- Confirmations tab: read-only table with status filter pills, browser-
  local-time deadline display, attendee count, decline reason snippet.
- Hotels tab: single-hotel form (name/address/link/notes) with live
  email-preview card showing what teams will see.
- Travel tab: per-attendee flight tracker with arrival/departure
  datetimes, flight numbers, IATA airports, click-to-toggle status badge,
  edit Sheet, and unfilled/pending/confirmed filter pills.

Smoke-tested end-to-end: navigation, sidebar entry, all three tabs
render, hotel save persists to DB and renders in preview card.

src/app/(admin)/admin/logistics/page.tsx

@@ -0,0 +1,87 @@
+'use client'
+
+import { useState } from 'react'
+import { useEdition } from '@/contexts/edition-context'
+import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
+import {
+  CheckCircle2,
+  FileText,
+  Hotel as HotelIcon,
+  Plane,
+  Salad,
+  ScrollText,
+  Settings,
+  Stamp,
+} from 'lucide-react'
+import { ConfirmationsTab } from '@/components/admin/logistics/confirmations-tab'
+import { TravelTab } from '@/components/admin/logistics/travel-tab'
+import { HotelsTab } from '@/components/admin/logistics/hotels-tab'
+
+export default function LogisticsPage() {
+  const { currentEdition } = useEdition()
+  const [tab, setTab] = useState('confirmations')
+
+  if (!currentEdition) {
+    return (
+      <p className="text-muted-foreground py-12 text-center text-sm">
+        Select an edition to view logistics.
+      </p>
+    )
+  }
+  const programId = currentEdition.id
+
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-2xl font-semibold tracking-tight">Logistics</h1>
+        <p className="text-muted-foreground">
+          Operational hub for the grand finale: confirmations, travel, hotels, and more.
+        </p>
+      </div>
+
+      <Tabs value={tab} onValueChange={setTab} className="space-y-6">
+        <TabsList className="flex-wrap">
+          <TabsTrigger value="confirmations">
+            <CheckCircle2 className="mr-2 h-4 w-4" /> Confirmations
+          </TabsTrigger>
+          <TabsTrigger value="travel">
+            <Plane className="mr-2 h-4 w-4" /> Travel
+          </TabsTrigger>
+          <TabsTrigger value="hotels">
+            <HotelIcon className="mr-2 h-4 w-4" /> Hotels
+          </TabsTrigger>
+          <TabsTrigger value="visas" disabled>
+            <Stamp className="mr-2 h-4 w-4" /> Visas
+            <span className="text-muted-foreground ml-1 text-xs">(soon)</span>
+          </TabsTrigger>
+          <TabsTrigger value="lunch" disabled>
+            <Salad className="mr-2 h-4 w-4" /> Lunch
+            <span className="text-muted-foreground ml-1 text-xs">(soon)</span>
+          </TabsTrigger>
+          <TabsTrigger value="documents" disabled>
+            <FileText className="mr-2 h-4 w-4" /> Documents
+            <span className="text-muted-foreground ml-1 text-xs">(soon)</span>
+          </TabsTrigger>
+          <TabsTrigger value="email-templates" disabled>
+            <ScrollText className="mr-2 h-4 w-4" /> Email Templates
+            <span className="text-muted-foreground ml-1 text-xs">(soon)</span>
+          </TabsTrigger>
+          <TabsTrigger value="settings" disabled>
+            <Settings className="mr-2 h-4 w-4" /> Settings
+            <span className="text-muted-foreground ml-1 text-xs">(soon)</span>
+          </TabsTrigger>
+        </TabsList>
+
+        <TabsContent value="confirmations">
+          <ConfirmationsTab programId={programId} />
+        </TabsContent>
+        <TabsContent value="travel">
+          <TravelTab programId={programId} />
+        </TabsContent>
+        <TabsContent value="hotels">
+          <HotelsTab programId={programId} />
+        </TabsContent>
+      </Tabs>
+    </div>
+  )
+}