feat(ui): unify content shell layout

app/(order)/dispute/[id]/page.tsx

@@ -197,7 +197,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
 
   if (loading) {
     return (
-      <div className="container mx-auto max-w-lg px-4 py-8">
+      <div className="container mx-auto max-w-2xl px-4 py-8">
         <EmptyState title="争议加载中" icon={Clock} />
       </div>
     )
@@ -205,7 +205,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
 
   if (!order) {
     return (
-      <div className="container mx-auto max-w-lg px-4 py-8">
+      <div className="container mx-auto max-w-2xl px-4 py-8">
         <EmptyState title="订单不存在" description="无法找到对应订单。" icon={FileText} />
       </div>
     )
@@ -216,7 +216,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
   )
   if (!isParticipant) {
     return (
-      <div className="container mx-auto max-w-lg px-4 py-8">
+      <div className="container mx-auto max-w-2xl px-4 py-8">
         <EmptyState
           title="无法访问争议页面"
           description="仅该订单参与方可访问争议页面。"
@@ -474,7 +474,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
 
   if (showSubmitted) {
     return (
-      <div className="container mx-auto max-w-lg px-4 py-8">
+      <div className="container mx-auto max-w-2xl px-4 py-8">
         <EmptyState
           title="争议已提交，请等待平台处理"
           description={`平台将在约 ${Math.floor(DISPUTE_TO_RESOLVED_MS / 1000)} 秒内给出模拟处理结果。`}
@@ -490,7 +490,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
   }
 
   return (
-    <div className="container mx-auto max-w-lg px-4 py-8 space-y-4">
+    <div className="container mx-auto max-w-2xl px-4 py-8 space-y-4">
       <Link
         href={`/order/${id}`}
         className="inline-flex items-center gap-1 text-sm text-muted-foreground hover:text-foreground"