feat(web): 命令面板 combobox+可见入口 + sticky 导航壳 + 焦点环统一 + 抽屉锁滚动/关闭按钮 + 主题首帧修复 + 设置徽标/datalist

apps/web/components/LeftNav.tsx

@@ -11,7 +11,7 @@ interface LeftNavProps {
 export function LeftNav({ projectId, activeNav }: LeftNavProps) {
   return (
     <nav
-      className="hidden w-44 shrink-0 border-r border-line bg-panel py-4 lg:block"
+      className="sticky top-[var(--chrome)] hidden max-h-[calc(100vh-var(--chrome))] w-44 shrink-0 self-start overflow-y-auto border-r border-line bg-panel py-4 lg:block"
       aria-label="主导航"
     >
       <NavItems projectId={projectId} activeNav={activeNav} />