diff --git a/web/src/pages/AssistantChatPage.tsx b/web/src/pages/AssistantChatPage.tsx
index 2cfe669..8dbfdc1 100644
--- a/web/src/pages/AssistantChatPage.tsx
+++ b/web/src/pages/AssistantChatPage.tsx
@@ -1,5 +1,4 @@
 import { FormEvent, useEffect, useRef, useState } from 'react'
-import { Loader2, MessageSquare, Plus, Send, Trash2 } from 'lucide-react'
 import toast from 'react-hot-toast'
 
 import {
@@ -9,6 +8,7 @@ import {
   type SessionView,
 } from '../api/assistant'
 import { confirmAction } from '../components/confirmAction'
+import { AssistantConversationPane, AssistantSessionsSidebar } from './AssistantChatSections'
 
 // AssistantChatPage is the multi-turn chat surface backed by the Go
 // AssistantService. It complements the older AIAssistantPage which is
@@ -113,110 +113,22 @@ export function AssistantChatPage() {
 
   return (
     <div className="grid h-[calc(100vh-100px)] grid-cols-[260px_1fr] gap-4">
-      {/* Sessions sidebar */}
-      <aside className="glass-panel flex flex-col overflow-hidden">
-        <div className="mb-3 flex items-center justify-between">
-          <h2 className="font-display text-sm font-semibold text-ink-600">会话</h2>
-          <button onClick={onNew} className="neon-button !px-2 !py-1 text-xs">
-            <Plus size={12} /> 新建
-          </button>
-        </div>
-        {loading && (
-          <div className="flex justify-center py-6 text-ink-50">
-            <Loader2 className="animate-spin" />
-          </div>
-        )}
-        <ul className="flex-1 space-y-1 overflow-y-auto pr-1">
-          {sessions.map((s) => (
-            <li
-              key={s.id}
-              className={
-                'group flex items-center gap-2 rounded px-2 py-2 text-sm cursor-pointer ' +
-                (active?.session.id === s.id
-                  ? 'bg-primary-400/10 text-brand-500'
-                  : 'text-ink-100 hover:bg-gray-50 hover:text-white')
-              }
-              onClick={() => onSelect(s.id)}
-            >
-              <MessageSquare size={14} className="shrink-0" />
-              <span className="flex-1 truncate">{s.title || '未命名'}</span>
-              <button
-                onClick={(e) => {
-                  e.stopPropagation()
-                  onDelete(s.id)
-                }}
-                className="opacity-0 group-hover:opacity-100"
-              >
-                <Trash2 size={12} className="text-red-400" />
-              </button>
-            </li>
-          ))}
-          {!loading && sessions.length === 0 && (
-            <li className="px-2 py-2 text-xs text-sand-500">暂无会话</li>
-          )}
-        </ul>
-      </aside>
-
-      {/* Conversation pane */}
-      <section className="glass-panel flex flex-col overflow-hidden">
-        {!active && (
-          <div className="m-auto text-center text-ink-50">
-            <MessageSquare size={32} className="mx-auto mb-2 opacity-50" />
-            <p>选择或创建一个会话开始对话</p>
-          </div>
-        )}
-        {active && (
-          <>
-            <div className="mb-3 border-b border-gray-200 pb-2">
-              <h2 className="font-display text-base font-semibold text-ink-600">
-                {active.session.title || '未命名'}
-              </h2>
-            </div>
-            <div className="flex-1 space-y-3 overflow-y-auto pr-2">
-              {active.messages.length === 0 && (
-                <p className="text-sm text-sand-500">说点什么开始对话…</p>
-              )}
-              {active.messages.map((m) => (
-                <Bubble key={m.id} message={m} />
-              ))}
-              <div ref={messagesEndRef} />
-            </div>
-            <form onSubmit={onSend} className="mt-3 flex gap-2 border-t border-gray-200 pt-3">
-              <input
-                className="input-base flex-1"
-                placeholder="发送消息…"
-                value={draft}
-                onChange={(e) => setDraft(e.target.value)}
-                disabled={sending}
-              />
-              <button type="submit" disabled={sending || !draft.trim()} className="neon-button">
-                {sending ? <Loader2 size={16} className="animate-spin" /> : <Send size={16} />}
-                发送
-              </button>
-            </form>
-          </>
-        )}
-      </section>
-    </div>
-  )
-}
-
-function Bubble({ message }: { message: AssistantMessage }) {
-  const mine = message.role === 'user'
-  return (
-    <div className={'flex ' + (mine ? 'justify-end' : 'justify-start')}>
-      <div
-        className={
-          'max-w-[80%] whitespace-pre-wrap rounded-2xl px-4 py-2 text-sm ' +
-          (mine
-            ? 'bg-primary-400/20 text-primary-100'
-            : message.role === 'system'
-              ? 'border border-amber-400/30 bg-amber-400/5 text-amber-200'
-              : 'bg-gray-50 text-ink-200')
-        }
-      >
-        {message.content}
-      </div>
+      <AssistantSessionsSidebar
+        sessions={sessions}
+        activeSessionId={active?.session.id}
+        loading={loading}
+        onNew={onNew}
+        onSelect={onSelect}
+        onDelete={onDelete}
+      />
+      <AssistantConversationPane
+        active={active}
+        draft={draft}
+        sending={sending}
+        messagesEndRef={messagesEndRef}
+        onDraftChange={setDraft}
+        onSend={onSend}
+      />
     </div>
   )
 }
diff --git a/web/src/pages/AssistantChatSections.tsx b/web/src/pages/AssistantChatSections.tsx
new file mode 100644
index 0000000..bb88e60
--- /dev/null
+++ b/web/src/pages/AssistantChatSections.tsx
@@ -0,0 +1,143 @@
+import type { FormEvent, RefObject } from 'react'
+import { Loader2, MessageSquare, Plus, Send, Trash2 } from 'lucide-react'
+
+import type { AssistantMessage, AssistantSession, SessionView } from '../api/assistant'
+
+export function AssistantSessionsSidebar({
+  sessions,
+  activeSessionId,
+  loading,
+  onNew,
+  onSelect,
+  onDelete,
+}: {
+  sessions: AssistantSession[]
+  activeSessionId?: string
+  loading: boolean
+  onNew: () => void
+  onSelect: (id: string) => void
+  onDelete: (id: string) => void
+}) {
+  return (
+    <aside className="glass-panel flex flex-col overflow-hidden">
+      <div className="mb-3 flex items-center justify-between">
+        <h2 className="font-display text-sm font-semibold text-ink-600">会话</h2>
+        <button onClick={onNew} className="neon-button !px-2 !py-1 text-xs">
+          <Plus size={12} /> 新建
+        </button>
+      </div>
+      {loading && (
+        <div className="flex justify-center py-6 text-ink-50">
+          <Loader2 className="animate-spin" />
+        </div>
+      )}
+      <ul className="flex-1 space-y-1 overflow-y-auto pr-1">
+        {sessions.map((session) => (
+          <li
+            key={session.id}
+            className={
+              'group flex items-center gap-2 rounded px-2 py-2 text-sm cursor-pointer ' +
+              (activeSessionId === session.id
+                ? 'bg-primary-400/10 text-brand-500'
+                : 'text-ink-100 hover:bg-gray-50 hover:text-white')
+            }
+            onClick={() => onSelect(session.id)}
+          >
+            <MessageSquare size={14} className="shrink-0" />
+            <span className="flex-1 truncate">{session.title || '未命名'}</span>
+            <button
+              onClick={(event) => {
+                event.stopPropagation()
+                onDelete(session.id)
+              }}
+              className="opacity-0 group-hover:opacity-100"
+            >
+              <Trash2 size={12} className="text-red-400" />
+            </button>
+          </li>
+        ))}
+        {!loading && sessions.length === 0 && (
+          <li className="px-2 py-2 text-xs text-sand-500">暂无会话</li>
+        )}
+      </ul>
+    </aside>
+  )
+}
+
+export function AssistantConversationPane({
+  active,
+  draft,
+  sending,
+  messagesEndRef,
+  onDraftChange,
+  onSend,
+}: {
+  active: SessionView | null
+  draft: string
+  sending: boolean
+  messagesEndRef: RefObject<HTMLDivElement>
+  onDraftChange: (value: string) => void
+  onSend: (event: FormEvent<HTMLFormElement>) => void
+}) {
+  return (
+    <section className="glass-panel flex flex-col overflow-hidden">
+      {!active && (
+        <div className="m-auto text-center text-ink-50">
+          <MessageSquare size={32} className="mx-auto mb-2 opacity-50" />
+          <p>选择或创建一个会话开始对话</p>
+        </div>
+      )}
+      {active && (
+        <>
+          <div className="mb-3 border-b border-gray-200 pb-2">
+            <h2 className="font-display text-base font-semibold text-ink-600">
+              {active.session.title || '未命名'}
+            </h2>
+          </div>
+          <div className="flex-1 space-y-3 overflow-y-auto pr-2">
+            {active.messages.length === 0 && (
+              <p className="text-sm text-sand-500">说点什么开始对话…</p>
+            )}
+            {active.messages.map((message) => (
+              <Bubble key={message.id} message={message} />
+            ))}
+            <div ref={messagesEndRef} />
+          </div>
+          <form onSubmit={onSend} className="mt-3 flex gap-2 border-t border-gray-200 pt-3">
+            <input
+              className="input-base flex-1"
+              placeholder="发送消息…"
+              value={draft}
+              onChange={(event) => onDraftChange(event.target.value)}
+              disabled={sending}
+            />
+            <button type="submit" disabled={sending || !draft.trim()} className="neon-button">
+              {sending ? <Loader2 size={16} className="animate-spin" /> : <Send size={16} />}
+              发送
+            </button>
+          </form>
+        </>
+      )}
+    </section>
+  )
+}
+
+function Bubble({ message }: { message: AssistantMessage }) {
+  const mine = message.role === 'user'
+  return (
+    <div className={'flex ' + (mine ? 'justify-end' : 'justify-start')}>
+      <div
+        className={
+          'max-w-[80%] whitespace-pre-wrap rounded-2xl px-4 py-2 text-sm ' +
+          (mine
+            ? 'bg-primary-400/20 text-primary-100'
+            : message.role === 'system'
+              ? 'border border-amber-400/30 bg-amber-400/5 text-amber-200'
+              : 'bg-gray-50 text-ink-200')
+        }
+      >
+        {message.content}
+      </div>
+    </div>
+  )
+}