diff --git a/ui/src/App.tsx b/ui/src/App.tsx
index 0988a41..32a6a04 100644
--- a/ui/src/App.tsx
+++ b/ui/src/App.tsx
@@ -1,7 +1,8 @@
-import { useEffect } from "react";
+import { useEffect, useState } from "react";
 import { NavLink, Route, Routes } from "react-router-dom";
 import { EngineDeployEvent, onEvent } from "./api";
 import { useStore } from "./store";
+import Icon from "./components/Icon";
 import ModelsPage from "./pages/ModelsPage";
 import ChatPage from "./pages/ChatPage";
 import ModelPlazaPage from "./pages/ModelPlazaPage";
@@ -9,20 +10,31 @@ import ServerPage from "./pages/ServerPage";
 import SettingsPage from "./pages/SettingsPage";
 
 const navItems = [
-  { to: "/chat", label: "对话" },
-  { to: "/", label: "模型管理", end: true },
-  { to: "/plaza", label: "模型广场" },
-  { to: "/server", label: "本地服务" },
-  { to: "/settings", label: "设置" },
+  { to: "/chat", label: "对话", icon: "chat" },
+  { to: "/", label: "模型管理", icon: "box", end: true },
+  { to: "/plaza", label: "模型广场", icon: "plaza" },
+  { to: "/server", label: "服务管理", icon: "server" },
+  { to: "/settings", label: "设置", icon: "settings" },
 ];
 
 export default function App() {
+  const [collapsed, setCollapsed] = useState(
+    () => localStorage.getItem("xianren-nav-collapsed") === "1",
+  );
   const refreshModels = useStore((s) => s.refreshModels);
   const refreshEngine = useStore((s) => s.refreshEngine);
   const refreshServer = useStore((s) => s.refreshServer);
   const refreshConversations = useStore((s) => s.refreshConversations);
   const setDeployState = useStore((s) => s.setDeployState);
 
+  function toggleCollapsed() {
+    setCollapsed((v) => {
+      const next = !v;
+      localStorage.setItem("xianren-nav-collapsed", next ? "1" : "0");
+      return next;
+    });
+  }
+
   useEffect(() => {
     refreshModels();
     refreshEngine();
@@ -53,33 +65,52 @@ export default function App() {
 
   return (
     <div className="flex h-screen overflow-hidden">
-      <aside className="flex w-56 flex-col gap-1 border-r border-border bg-panel p-3">
-        <div className="mb-4 flex items-center gap-2 px-2">
-          <div className="flex h-9 w-9 items-center justify-center rounded-xl bg-gradient-to-br from-accent to-accent-2 text-lg font-bold">
+      <aside
+        className={`flex flex-col gap-1 border-r border-border bg-panel p-2 transition-all duration-200 ${
+          collapsed ? "w-16" : "w-56"
+        }`}
+      >
+        <div
+          className={`mb-4 flex items-center ${collapsed ? "justify-center" : "gap-2 px-2"}`}
+        >
+          <div className="flex h-9 w-9 shrink-0 items-center justify-center rounded-xl bg-gradient-to-br from-accent to-accent-2 text-lg font-bold">
             仙
           </div>
-          <div>
-            <div className="text-sm font-semibold">仙人工作室</div>
-            <div className="text-xs text-slate-400">本地大模型工作台</div>
-          </div>
+          {!collapsed ? (
+            <div className="min-w-0">
+              <div className="truncate text-sm font-semibold">仙人工作室</div>
+              <div className="truncate text-xs text-slate-400">本地大模型工作台</div>
+            </div>
+          ) : null}
         </div>
         {navItems.map((item) => (
           <NavLink
             key={item.to}
             to={item.to}
             end={item.end}
+            title={item.label}
             className={({ isActive }) =>
-              `rounded-lg px-3 py-2 text-sm transition-colors ${
+              `flex items-center gap-3 rounded-lg px-3 py-2 text-sm transition-colors ${
+                collapsed ? "justify-center px-0" : ""
+              } ${
                 isActive
                   ? "bg-panel-2 text-white"
                   : "text-slate-300 hover:bg-panel-2/60"
               }`
             }
           >
-            {item.label}
+            <Icon name={item.icon} className="h-[18px] w-[18px] shrink-0" />
+            {!collapsed ? <span className="truncate">{item.label}</span> : null}
           </NavLink>
         ))}
-        <EngineChip />
+        <EngineChip collapsed={collapsed} />
+        <button
+          className="mt-1 flex items-center justify-center rounded-lg px-2 py-1.5 text-slate-400 hover:bg-panel-2/60 hover:text-slate-200"
+          onClick={toggleCollapsed}
+          title={collapsed ? "展开侧边栏" : "折叠侧边栏"}
+        >
+          <Icon name={collapsed ? "chevron-right" : "chevron-left"} />
+        </button>
       </aside>
       <main className="flex-1 overflow-hidden">
         <Routes>
@@ -94,9 +125,21 @@ export default function App() {
   );
 }
 
-function EngineChip() {
+function EngineChip({ collapsed }: { collapsed: boolean }) {
   const engine = useStore((s) => s.engine);
   const running = engine?.running ?? false;
+  if (collapsed) {
+    return (
+      <div
+        className="mt-auto flex justify-center rounded-lg py-2"
+        title={running ? `引擎运行中${engine?.model ? ` · ${engine.model}` : ""}` : "引擎未启动"}
+      >
+        <span
+          className={`h-2.5 w-2.5 rounded-full ${running ? "bg-emerald-400" : "bg-slate-500"}`}
+        />
+      </div>
+    );
+  }
   return (
     <div className="mt-auto rounded-lg border border-border bg-panel-2 px-3 py-2 text-xs text-slate-300">
       <div className="flex items-center gap-2">
diff --git a/ui/src/components/Icon.tsx b/ui/src/components/Icon.tsx
new file mode 100644
index 0000000..cd568e5
--- /dev/null
+++ b/ui/src/components/Icon.tsx
@@ -0,0 +1,59 @@
+import type { ReactNode } from "react";
+
+const paths: Record<string, ReactNode> = {
+  chat: <path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z" />,
+  box: (
+    <>
+      <path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z" />
+      <path d="M3.27 6.96L12 12.01l8.73-5.05" />
+      <path d="M12 22.08V12" />
+    </>
+  ),
+  plaza: (
+    <>
+      <rect x="3" y="3" width="7" height="7" rx="1" />
+      <rect x="14" y="3" width="7" height="7" rx="1" />
+      <rect x="3" y="14" width="7" height="7" rx="1" />
+      <rect x="14" y="14" width="7" height="7" rx="1" />
+    </>
+  ),
+  server: (
+    <>
+      <rect x="2" y="2" width="20" height="8" rx="2" />
+      <rect x="2" y="14" width="20" height="8" rx="2" />
+      <path d="M6 6h.01M6 18h.01" />
+    </>
+  ),
+  settings: (
+    <>
+      <path d="M4 21v-7M4 10V3M12 21v-9M12 8V3M20 21v-5M20 12V3" />
+      <path d="M1 14h6M9 8h6M17 16h6" />
+    </>
+  ),
+  "chevron-left": <path d="M15 18l-6-6 6-6" />,
+  "chevron-right": <path d="M9 18l6-6-6-6" />,
+};
+
+export default function Icon({
+  name,
+  className = "h-4 w-4",
+}: {
+  name: string;
+  className?: string;
+}) {
+  return (
+    <svg
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      strokeWidth="2"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      className={className}
+      aria-hidden="true"
+    >
+      {paths[name]}
+    </svg>
+  );
+}
+
diff --git a/ui/src/pages/ChatPage.tsx b/ui/src/pages/ChatPage.tsx
index 8a312b6..2ada170 100644
--- a/ui/src/pages/ChatPage.tsx
+++ b/ui/src/pages/ChatPage.tsx
@@ -10,6 +10,7 @@ import {
   onEvent,
 } from "../api";
 import { useStore } from "../store";
+import Icon from "../components/Icon";
 
 interface LocalMessage {
   id: string;
@@ -38,8 +39,19 @@ export default function ChatPage() {
   const [error, setError] = useState<string | null>(null);
   const [params, setParams] = useState<ChatParams>(defaultParams);
   const [selectedModelId, setSelectedModelId] = useState<string>("");
+  const [rightOpen, setRightOpen] = useState(
+    () => localStorage.getItem("xianren-right-open") !== "0",
+  );
   const bottomRef = useRef<HTMLDivElement>(null);
 
+  function toggleRight() {
+    setRightOpen((v) => {
+      const next = !v;
+      localStorage.setItem("xianren-right-open", next ? "1" : "0");
+      return next;
+    });
+  }
+
   useEffect(() => {
     if (models.length > 0 && !selectedModelId) {
       setSelectedModelId(models[0].id);
@@ -275,96 +287,121 @@ export default function ChatPage() {
         </div>
       </div>
 
-      {/* 右侧边栏：当前模型 + 部署/请求参数 */}
-      <div className="flex w-72 flex-col overflow-y-auto border-l border-border bg-panel p-3">
-        <div className="mb-1 text-xs text-slate-400">当前模型</div>
-        <select
-          className="input w-full"
-          value={selectedModelId}
-          onChange={(e) => setSelectedModelId(e.target.value)}
-        >
-          {models.map((m) => (
-            <option key={m.id} value={m.id}>
-              {m.file_name}
-              {m.kind === "remote" ? "（API）" : ""}
-              {engineRunning && engineModel === m.file_name ? " ●已部署" : ""}
-            </option>
-          ))}
-        </select>
-        {selectedIsRemote ? (
-          <div className="mt-2 rounded-lg border border-sky-500/30 bg-sky-500/10 px-3 py-1.5 text-xs text-sky-300">
-            在线 API 模型，无需本地引擎
-          </div>
-        ) : (
-          <div className="mt-2 flex gap-2">
+      {/* 右侧边栏：当前模型 + 部署/请求参数（可收起） */}
+      {rightOpen ? (
+        <div className="flex w-72 flex-col overflow-y-auto border-l border-border bg-panel p-3">
+          <div className="mb-2 flex items-center justify-between">
+            <span className="text-xs uppercase text-slate-400">参数面板</span>
             <button
-              className="flex-1 rounded-lg border border-border bg-panel-2 py-1.5 text-xs hover:bg-panel-2/60"
-              onClick={() =>
-                api.engineStart(selectedModelId, params).catch((e) => alert(String(e)))
-              }
-              disabled={engineRunning}
+              className="rounded p-1 text-slate-400 hover:bg-panel-2/60 hover:text-slate-200"
+              onClick={toggleRight}
+              title="收起参数面板"
             >
-              启动引擎
-            </button>
-            <button
-              className="flex-1 rounded-lg border border-border bg-panel-2 py-1.5 text-xs hover:bg-panel-2/60"
-              onClick={() => api.engineStop().catch((e) => alert(String(e)))}
-              disabled={!engineRunning}
-            >
-              停止引擎
+              <Icon name="chevron-right" />
             </button>
           </div>
-        )}
-        <div className="mt-1 truncate text-xs text-slate-500">{engineLabel}</div>
+          <div className="mb-1 text-xs text-slate-400">当前模型</div>
+          <select
+            className="input w-full"
+            value={selectedModelId}
+            onChange={(e) => setSelectedModelId(e.target.value)}
+          >
+            {models.map((m) => (
+              <option key={m.id} value={m.id}>
+                {m.file_name}
+                {m.kind === "remote" ? "（API）" : ""}
+                {engineRunning && engineModel === m.file_name ? " ●已部署" : ""}
+              </option>
+            ))}
+          </select>
+          {selectedIsRemote ? (
+            <div className="mt-2 rounded-lg border border-sky-500/30 bg-sky-500/10 px-3 py-1.5 text-xs text-sky-300">
+              在线 API 模型，无需本地引擎
+            </div>
+          ) : (
+            <div className="mt-2 flex gap-2">
+              <button
+                className="flex-1 rounded-lg border border-border bg-panel-2 py-1.5 text-xs hover:bg-panel-2/60"
+                onClick={() =>
+                  api.engineStart(selectedModelId, params).catch((e) => alert(String(e)))
+                }
+                disabled={engineRunning}
+              >
+                启动引擎
+              </button>
+              <button
+                className="flex-1 rounded-lg border border-border bg-panel-2 py-1.5 text-xs hover:bg-panel-2/60"
+                onClick={() => api.engineStop().catch((e) => alert(String(e)))}
+                disabled={!engineRunning}
+              >
+                停止引擎
+              </button>
+            </div>
+          )}
+          <div className="mt-1 truncate text-xs text-slate-500">{engineLabel}</div>
 
-        <div className="mt-4 border-t border-border pt-3">
-          <div className="mb-3 text-xs uppercase text-slate-400">部署参数</div>
-          <ParamSlider
-            label="上下文长度 ctx_size"
-            value={params.ctx_size}
-            min={512}
-            max={32768}
-            step={512}
-            onChange={(v) => setParams({ ...params, ctx_size: v })}
-          />
-          <ParamSlider
-            label="GPU 层数 ngl（99=全部）"
-            value={params.ngl}
-            min={0}
-            max={99}
-            step={1}
-            onChange={(v) => setParams({ ...params, ngl: v })}
-          />
-        </div>
+          <div className="mt-4 border-t border-border pt-3">
+            <div className="mb-3 text-xs uppercase text-slate-400">部署参数</div>
+            <ParamSlider
+              label="上下文长度 ctx_size"
+              value={params.ctx_size}
+              min={512}
+              max={32768}
+              step={512}
+              onChange={(v) => setParams({ ...params, ctx_size: v })}
+            />
+            <ParamSlider
+              label="GPU 层数 ngl（99=全部）"
+              value={params.ngl}
+              min={0}
+              max={99}
+              step={1}
+              onChange={(v) => setParams({ ...params, ngl: v })}
+            />
+          </div>
 
-        <div className="mt-4 border-t border-border pt-3">
-          <div className="mb-3 text-xs uppercase text-slate-400">请求参数</div>
-          <ParamSlider
-            label="temperature"
-            value={params.temperature}
-            min={0}
-            max={2}
-            step={0.05}
-            onChange={(v) => setParams({ ...params, temperature: v })}
-          />
-          <ParamSlider
-            label="top_p"
-            value={params.top_p}
-            min={0}
-            max={1}
-            step={0.05}
-            onChange={(v) => setParams({ ...params, top_p: v })}
-          />
-          <ParamSlider
-            label="max_tokens"
-            value={params.max_tokens}
-            min={64}
-            max={8192}
-            step={64}
-            onChange={(v) => setParams({ ...params, max_tokens: v })}
-          />
+          <div className="mt-4 border-t border-border pt-3">
+            <div className="mb-3 text-xs uppercase text-slate-400">请求参数</div>
+            <ParamSlider
+              label="temperature"
+              value={params.temperature}
+              min={0}
+              max={2}
+              step={0.05}
+              onChange={(v) => setParams({ ...params, temperature: v })}
+            />
+            <ParamSlider
+              label="top_p"
+              value={params.top_p}
+              min={0}
+              max={1}
+              step={0.05}
+              onChange={(v) => setParams({ ...params, top_p: v })}
+            />
+            <ParamSlider
+              label="max_tokens"
+              value={params.max_tokens}
+              min={64}
+              max={8192}
+              step={64}
+              onChange={(v) => setParams({ ...params, max_tokens: v })}
+            />
+          </div>
         </div>
-      </div>
+      ) : (
+        <div className="flex w-9 flex-col items-center border-l border-border bg-panel py-2">
+          <button
+            className="rounded p-1.5 text-slate-400 hover:bg-panel-2/60 hover:text-slate-200"
+            onClick={toggleRight}
+            title="展开参数面板"
+          >
+            <Icon name="chevron-left" />
+          </button>
+          <span className="mt-3 whitespace-nowrap text-[10px] text-slate-500 [writing-mode:vertical-rl]">
+            参数
+          </span>
+        </div>
+      )}
     </div>
   );
 }
diff --git a/ui/src/pages/ServerPage.tsx b/ui/src/pages/ServerPage.tsx
index 9417e56..408c1b7 100644
--- a/ui/src/pages/ServerPage.tsx
+++ b/ui/src/pages/ServerPage.tsx
@@ -30,7 +30,7 @@ export default function ServerPage() {
 
   return (
     <div className="h-full overflow-auto p-6">
-      <h1 className="text-xl font-semibold">本地 API 服务</h1>
+      <h1 className="text-xl font-semibold">服务管理</h1>
       <p className="mt-1 text-sm text-slate-400">
         启动后即可用 OpenAI SDK / 任意 HTTP 客户端调用本地模型
       </p>
@@ -91,4 +91,3 @@ export default function ServerPage() {
     </div>
   );
 }
-