Refactor Sidebar layout by adjusting header height and removing unused labels for a cleaner interface

src/components/layout/Sidebar.tsx

@@ -71,7 +71,7 @@ export function Sidebar({
         collapsed ? "w-[76px]" : "w-[252px]",
       ].join(" ")}
     >
-      <div className="shrink-0 flex h-[81px] items-center gap-3 border-b border-sidebar-border px-5 transition-[padding] duration-300 ease-[cubic-bezier(0.22,1,0.36,1)]">
+      <div className="shrink-0 flex h-16 items-center gap-3 border-b border-sidebar-border px-5 transition-[padding] duration-300 ease-[cubic-bezier(0.22,1,0.36,1)]">
         <div
           className="relative flex h-11 w-11 shrink-0 items-center justify-center rounded-2xl text-on-primary shadow-sm"
           style={{
@@ -92,7 +92,6 @@ export function Sidebar({
           <div className="truncate font-display text-base text-foreground">
             AI 视频助手
           </div>
-          <div className="truncate caption-label text-muted-soft">管理台</div>
         </div>
       </div>
 
@@ -252,16 +251,7 @@ export function Sidebar({
             <span className="block truncate text-sm font-medium text-foreground">
               管理员
             </span>
-            <span className="block truncate text-xs text-muted-soft">超级管理员</span>
           </span>
-
-          <ChevronRight
-            size={16}
-            className={[
-              "shrink-0 text-muted-soft transition-all duration-200 group-hover:translate-x-0.5 group-hover:text-foreground",
-              collapsed ? "hidden" : "opacity-0 group-hover:opacity-100",
-            ].join(" ")}
-          />
         </button>
 
         {/* 收起 / 展开侧栏 */}