feat: 统一管理端导航为后端下发菜单，移除本地权限过滤

src/lib/admin-nav-visibility.ts

@@ -1,17 +0,0 @@
-import type { AdminNavItem } from "@/modules/_config/admin-nav";
-
-/** 已登录且拥有 `requiredAny` 中任一 slug 则显示；未配置 `requiredAny` 则始终显示。 */
-export function adminNavItemVisible(
-  item: AdminNavItem,
-  permissionSlugs: readonly string[] | null | undefined,
-): boolean {
-  const req = item.requiredAny;
-  if (req === undefined || req.length === 0) {
-    return true;
-  }
-  const set = permissionSlugs ?? [];
-  if (set.length === 0) {
-    return false;
-  }
-  return req.some((slug) => set.includes(slug));
-}