feat: change language

app/admin/guests/[id]/page.tsx

@@ -3,6 +3,7 @@ import { notFound } from "next/navigation"
 
 import { CopyInviteButton } from "@/components/admin/copy-invite-button"
 import { DeleteInvitationDialog } from "@/components/admin/delete-invitation-dialog"
+import { InvitationLanguageSelect } from "@/components/admin/invitation-language-select"
 import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert"
 import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
@@ -146,6 +147,14 @@ export default async function GuestDetailPage({
             <CardDescription>Admin-managed invitation fields.</CardDescription>
           </CardHeader>
           <CardContent className="space-y-3 text-sm">
+            <div className="space-y-2">
+              <span className="text-muted-foreground">Language</span>
+              <InvitationLanguageSelect
+                invitationId={detail.invitation.id}
+                currentLanguage={detail.invitation.language}
+                displayName={detail.invitation.display_name}
+              />
+            </div>
             <div className="flex justify-between gap-4">
               <span className="text-muted-foreground">Contact email</span>
               <span className="text-right">{detail.invitation.contact_email ?? "—"}</span>