修改网盘显示等细节，登陆验证更加严格，同时允许一台设备在线

front/src/admin/dashboard-state.ts

@@ -0,0 +1,21 @@
+import type { AdminSummary } from '@/src/lib/types';
+
+export interface InviteCodePanelState {
+  inviteCode: string;
+  canCopy: boolean;
+}
+
+export function getInviteCodePanelState(summary: AdminSummary | null | undefined): InviteCodePanelState {
+  const inviteCode = summary?.inviteCode?.trim() ?? '';
+  if (!inviteCode) {
+    return {
+      inviteCode: '未生成',
+      canCopy: false,
+    };
+  }
+
+  return {
+    inviteCode,
+    canCopy: true,
+  };
+}