修复主题一些细节优化问题

write/src/components/Sidebar.tsx

@@ -3,6 +3,7 @@
 import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { FileText, PenSquare, MessageSquare, Trash2, Rss, Link2, MessageCircle, Image } from "lucide-react";
+import ThemeToggle from "./ThemeToggle";
 
 const navItems = [
   { href: "/", label: "文章", icon: FileText },
@@ -56,6 +57,7 @@ export default function Sidebar() {
 
       {/* Footer */}
       <div className="px-4 py-3 border-t border-line">
+        <ThemeToggle />
         <p className="text-[10px] text-muted/50">localhost:8016</p>
       </div>
     </aside>