chore: drop dead Logistics tabs + move visa toggle to settings

- Remove the Documents tab — visa documents are out of scope for this
  edition and there is no other concrete document need.
- Remove the Logistics > Settings disabled tab — every per-edition
  configuration knob now lives at /admin/settings > Edition.
- Replace the inline "Visible to teams" toggle on the Visas tab with a
  small "Edition settings" button that links straight to the
  consolidated settings page. The toggle itself moved to that page in
  the previous commit.
- Drop the now-unused getVisaVisibility / setVisaVisibility wiring
  inside VisasTab. (The procedures still exist server-side; the new
  Edition tab uses program.updateEditionSettings instead.)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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

@@ -5,12 +5,10 @@ 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'
@@ -58,18 +56,10 @@ export default function LogisticsPage() {
             <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">