refactor: standardize admin page shell

frontend/src/features/tickets/TicketDetailPage.tsx

@@ -3,6 +3,7 @@ import { Bot, CheckCircle2, CircleDot, Send, XCircle } from 'lucide-react'
 
 import { AppEmptyState } from '@/components/app/AppEmptyState'
 import { AppDetailLayout } from '@/components/app/AppDetailLayout'
+import { AppPage } from '@/components/app/AppPage'
 import { AppPageHeader } from '@/components/app/AppPageHeader'
 import { AppPriorityBadge } from '@/components/app/AppPriorityBadge'
 import { AppSection } from '@/components/app/AppSection'
@@ -87,23 +88,22 @@ export function TicketDetailPage({ ticketId }: { ticketId: number }) {
 
   if (error) {
     return (
-      <main className="min-h-screen bg-background p-6 text-foreground">
+      <AppPage maxWidth="6xl">
         <AppEmptyState title="无法加载工单" description={error} />
-      </main>
+      </AppPage>
     )
   }
 
   if (!ticket) {
     return (
-      <main className="min-h-screen bg-background p-6 text-foreground">
+      <AppPage maxWidth="6xl">
         <AppEmptyState title="正在加载工单" />
-      </main>
+      </AppPage>
     )
   }
 
   return (
-    <main className="min-h-screen bg-background p-6 text-foreground">
-      <div className="mx-auto flex max-w-6xl flex-col gap-4">
+    <AppPage maxWidth="6xl">
         <AppPageHeader
           title={ticket.title}
           description={ticket.ticket_no}
@@ -164,7 +164,6 @@ export function TicketDetailPage({ ticketId }: { ticketId: number }) {
           onOpenChange={setTransitionDialogOpen}
           onSubmit={handleTransition}
         />
-      </div>
-    </main>
+    </AppPage>
   )
 }