feat: 完成 R13/R14/R15/R16 小团队管理核心能力

client/src/pages/SystemSettingsPage.tsx

@@ -0,0 +1,29 @@
+import { Link } from "react-router-dom";
+import { PageHeader } from "../components/common/PageHeader";
+
+const ITEMS = [
+  { to: "/system/workspace", title: "工作区设置", description: "调整小团队模式的导航与模块显隐。" },
+  { to: "/people", title: "人员管理", description: "处理入职、转正、调岗、离职与档案。" },
+  { to: "/system/approval-rules", title: "审批规则", description: "维护仍在使用的简单审批链与规则。" },
+  { to: "/system/master-data", title: "主数据", description: "维护费用、法体、成本中心等主数据。" },
+  { to: "/system/notification-channels", title: "通知渠道", description: "继续保留 IM/邮件等补充通知渠道。" },
+  { to: "/system/integrations/erp", title: "ERP 集成", description: "查看备用集成能力与出入口。" },
+];
+
+export function SystemSettingsPage() {
+  return (
+    <div className="space-y-6">
+      <PageHeader title="系统设置" subtitle="小团队模式下的后台设置总入口。" />
+      <div className="grid gap-4 md:grid-cols-2 xl:grid-cols-3">
+        {ITEMS.map((item) => (
+          <Link key={item.to} to={item.to} className="card-std p-6 hover:bg-zinc-50">
+            <div className="text-base font-semibold text-zinc-900">{item.title}</div>
+            <div className="mt-2 text-sm text-zinc-600">{item.description}</div>
+          </Link>
+        ))}
+      </div>
+    </div>
+  );
+}
+
+export default SystemSettingsPage;