Splite docs to developer and user and bring profile link back

frontend/src/components/layout/Sidebar.tsx

@@ -16,6 +16,7 @@ import {
   Home,
   LogOut,
   PlayCircle,
+  User,
   Video,
 } from "lucide-react";
 import { useAuth } from "@/components/auth/AuthProvider";
@@ -279,6 +280,13 @@ export function Sidebar({ collapsed, onToggle }: SidebarProps) {
               <Bell size={16} />
               消息提示
             </DropdownMenuItem>
+            <DropdownMenuItem
+              className="h-10 rounded-xl px-3 font-normal"
+              onSelect={() => router.push("/profile")}
+            >
+              <User size={16} />
+              个人中心
+            </DropdownMenuItem>
             <DropdownMenuSeparator />
             <DropdownMenuItem
               variant="destructive"