feat: 完成 R13/R14/R15/R16 小团队管理核心能力

client/src/components/navigation/Sidebar.tsx

@@ -2,13 +2,13 @@ import { NavLinks } from "./NavLinks";
 
 export function Sidebar() {
   return (
-    <aside className="hidden w-64 border-r border-zinc-200 bg-white lg:flex lg:flex-col fixed inset-y-0 z-20">
-      <div className="border-b border-zinc-200 p-6 flex items-center gap-3">
-        <div className="size-8 bg-zinc-900 rounded-lg flex items-center justify-center text-white font-bold text-lg">H</div>
-        <span className="font-bold text-zinc-900 tracking-tight">海音达工作台</span>
+    <aside className="fixed inset-y-0 z-20 hidden w-64 border-r border-zinc-200 bg-white lg:flex lg:flex-col overflow-hidden">
+      <div className="flex items-center gap-3 border-b border-zinc-200 p-6">
+        <div className="flex size-8 items-center justify-center rounded-lg bg-zinc-900 text-lg font-bold text-white">H</div>
+        <span className="font-bold tracking-tight text-zinc-900">海音达工作台</span>
       </div>
 
-      <div className="flex-1 p-3">
+      <div className="min-h-0 flex-1 overflow-y-auto p-3">
         <NavLinks />
       </div>
     </aside>