fix(nav): 修复问答梳理等带子路径页面的导航高亮丢失问题

KnowledgeBasePage 加载后自动跳转至 /knowledge/:noteId，原精确路径匹配
导致顶栏和侧边栏选中态丢失。将 hasActiveChild / isItemActive /
menuItemContainsPath 等 8 处判断统一改为前缀匹配
（pathname === path || pathname.startsWith(path + "/")），
覆盖浅色侧边栏、深色侧边栏、顶部导航栏三套组件。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend-web/src/pages/LightAppManagementPage.tsx

@@ -650,7 +650,7 @@ export default function LightAppManagementPage() {
             onClick={() => setDialogOpen(false)}
           />
 
-          <div className="lam-dialog relative z-[110] m-4 flex max-h-[90vh] w-full max-w-[580px] flex-col rounded-[5px] border border-[#E8E8E8] bg-white p-6 shadow-[0_8px_32px_rgba(34,34,34,0.16)]">
+          <div className="lam-dialog relative z-[110] m-4 flex max-h-[90vh] w-full max-w-[900px] flex-col rounded-[5px] border border-[#E8E8E8] bg-white p-6 shadow-[0_8px_32px_rgba(34,34,34,0.16)]">
             <div className="lam-dialog-header flex flex-shrink-0 items-center justify-between border-b border-[#E8E8E8] pb-4">
               <div className="flex items-center space-x-2.5">
                 <span className="lam-dialog-icon rounded-[5px] bg-rose-50 p-1.5 text-[#A8071A]">