feat(web): apply Lingniu brand assets

vehicle-data-platform/apps/web/src/v2/layout/AppShell.tsx

@@ -99,9 +99,9 @@ function Sidebar() {
 
   return (
     <aside className={`v2-sidebar${collapsed ? ' is-collapsed' : ''}`}>
-        <div className="v2-brand">
-          <span className="v2-brand-mark"><IconBox size="large" /></span>
-          <strong>车辆数据中台</strong>
+        <div className="v2-brand" aria-label="灵牛智能车辆数据中台">
+          <img className="v2-brand-logo" src="/brand-logo.svg" alt="灵牛智能" />
+          <img className="v2-brand-symbol" src="/brand-mark.svg" alt="" aria-hidden="true" />
         </div>
         <nav className="v2-navigation" aria-label="主导航">
           {navigation.map(({ to, label, icon: Icon }) => (