feat(web): 重构对话列表和资产页面，添加加载骨架屏和确认对话框

- 重构 MiddlePanel 对话列表，按时间分组并优化交互
- 为 AccountList 和 AssetGallery 添加加载骨架屏
- 用确认对话框替换原生 confirm，统一交互体验
- 优化聊天消息组件的视觉样式和细节
- 添加 Escape 键快速返回账户列表导航
- 更新构建资源文件

web/client/src/components/accounts/AccountList.tsx

@@ -1,15 +1,32 @@
 import { Plus, Search } from 'lucide-react';
-import { useState, useEffect } from 'react';
+import { useState } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useAccounts } from '@/hooks/useAccounts';
 import { AccountCard } from './AccountCard';
 import { AccountDetail } from './AccountDetail';
 import { Input } from '@/components/ui/input';
 
+function AccountCardSkeleton() {
+  return (
+    <div className="rounded-xl p-4 border border-zinc-100 bg-white">
+      <div className="flex items-start justify-between mb-2">
+        <div className="skeleton h-4 w-24" />
+        <div className="skeleton h-4 w-10 rounded-full" />
+      </div>
+      <div className="skeleton h-3 w-full mb-2" />
+      <div className="skeleton h-3 w-2/3 mb-3" />
+      <div className="flex gap-1.5">
+        <div className="skeleton h-4 w-14 rounded-full" />
+        <div className="skeleton h-4 w-12 rounded-full" />
+      </div>
+    </div>
+  );
+}
+
 export function AccountList() {
   const { accountId } = useParams<{ accountId?: string }>();
   const navigate = useNavigate();
-  const { accounts, create, update, remove } = useAccounts();
+  const { accounts, loading, create, update, remove } = useAccounts();
   const [search, setSearch] = useState('');
 
   const selected = accountId ? accounts.find((a) => a.id === accountId) || null : null;
@@ -42,22 +59,22 @@ export function AccountList() {
   return (
     <div className="flex flex-col h-full">
       {/* Header */}
-      <div className="flex items-center justify-between px-6 py-4 border-b border-zinc-200 bg-white flex-shrink-0">
+      <div className="flex items-center justify-between px-6 py-4 border-b border-zinc-100 bg-white flex-shrink-0">
         <div className="flex items-center gap-3">
           <h1 className="text-base font-semibold text-zinc-800">账号管理</h1>
           <div className="relative">
-            <Search size={14} className="absolute left-2.5 top-1/2 -translate-y-1/2 text-zinc-400" />
+            <Search size={14} className="absolute left-2.5 top-1/2 -translate-y-1/2 text-zinc-300" />
             <Input
               value={search}
               onChange={(e) => setSearch(e.target.value)}
               placeholder="搜索账号..."
-              className="pl-8 h-8 w-48 text-xs bg-zinc-50 border-zinc-200"
+              className="pl-8 h-8 w-48 text-xs bg-zinc-50/80 border-zinc-100 focus:bg-white"
             />
           </div>
         </div>
         <button
           onClick={handleCreate}
-          className="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium text-white bg-indigo-600 rounded-lg hover:bg-indigo-700 transition-colors"
+          className="inline-flex items-center gap-1.5 px-3.5 py-1.5 text-xs font-medium text-white bg-indigo-600 rounded-lg hover:bg-indigo-700 transition-colors shadow-sm shadow-indigo-200/50"
         >
           <Plus size={14} />
           新建账号
@@ -66,8 +83,12 @@ export function AccountList() {
 
       {/* Grid */}
       <div className="flex-1 overflow-auto p-6">
-        {filtered.length > 0 ? (
-          <div className="grid grid-cols-3 gap-4">
+        {loading ? (
+          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
+            {Array.from({ length: 6 }).map((_, i) => <AccountCardSkeleton key={i} />)}
+          </div>
+        ) : filtered.length > 0 ? (
+          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
             {filtered.map((a) => (
               <AccountCard
                 key={a.id}
@@ -78,12 +99,25 @@ export function AccountList() {
             ))}
           </div>
         ) : (
-          <div className="flex flex-col items-center justify-center h-full text-zinc-400">
-            <p className="text-sm">{search ? '没有匹配的账号' : '暂无账号'}</p>
-            {!search && (
-              <button onClick={handleCreate} className="mt-2 text-xs text-indigo-600 hover:underline">
-                创建第一个账号
-              </button>
+          <div className="flex flex-col items-center justify-center h-full text-zinc-300">
+            <div className="w-16 h-16 rounded-2xl bg-zinc-50 flex items-center justify-center mb-4">
+              <Search size={24} strokeWidth={1.5} className="text-zinc-300" />
+            </div>
+            {search ? (
+              <>
+                <p className="text-sm text-zinc-400">没有匹配「{search}」的账号</p>
+                <button onClick={() => setSearch('')} className="mt-2 text-xs text-indigo-500 hover:text-indigo-600">
+                  清除搜索
+                </button>
+              </>
+            ) : (
+              <>
+                <p className="text-sm text-zinc-400">还没有创建任何账号</p>
+                <button onClick={handleCreate} className="mt-3 inline-flex items-center gap-1.5 px-4 py-2 text-xs font-medium text-white bg-indigo-600 rounded-lg hover:bg-indigo-700 transition-colors shadow-sm shadow-indigo-200/50">
+                  <Plus size={14} />
+                  创建第一个账号
+                </button>
+              </>
             )}
           </div>
         )}

web/client/src/components/assets/AssetGallery.tsx

@@ -16,6 +16,22 @@ interface ManifestGroup {
 
 type TypeTab = 'all' | 'image' | 'video';
 
+function AssetGroupSkeleton() {
+  return (
+    <div className="mb-6">
+      <div className="flex items-center gap-3 mb-3">
+        <div className="skeleton h-4 w-28" />
+        <div className="skeleton h-3 w-20" />
+      </div>
+      <div className="flex gap-2.5">
+        {Array.from({ length: 4 }).map((_, i) => (
+          <div key={i} className="w-28 h-28 rounded-xl skeleton" />
+        ))}
+      </div>
+    </div>
+  );
+}
+
 export function AssetGallery() {
   const [accountFilter, setAccountFilter] = useState('');
   const [typeTab, setTypeTab] = useState<TypeTab>('all');
@@ -31,13 +47,11 @@ export function AssetGallery() {
     fetch('/api/assets/manifests').then((r) => r.json()).then(setManifests).catch(() => {});
   }, []);
 
-  // Filter by type tab
   const filtered = useMemo(() => {
     if (typeTab === 'all') return assets;
     return assets.filter((a) => a.type === typeTab);
   }, [assets, typeTab]);
 
-  // Group filtered assets by manifest_path
   const grouped = useMemo(() => {
     const map = new Map<string, Asset[]>();
     for (const asset of filtered) {
@@ -73,7 +87,6 @@ export function AssetGallery() {
     return parts.join(' · ');
   };
 
-  // Filter manifests by account
   const filteredGroups = useMemo(() => {
     if (!accountFilter) return [...grouped.entries()];
     return [...grouped.entries()].filter(([key]) => {
@@ -92,21 +105,20 @@ export function AssetGallery() {
   return (
     <div className="flex flex-col h-full">
       {/* Header */}
-      <div className="flex items-center gap-3 px-4 py-3 border-b border-zinc-200 bg-white flex-shrink-0">
-        {/* Type tabs */}
-        <div className="flex rounded-lg border border-zinc-200 overflow-hidden">
+      <div className="flex items-center gap-3 px-4 py-3 border-b border-zinc-100 bg-white flex-shrink-0">
+        <div className="flex rounded-lg border border-zinc-100 overflow-hidden bg-zinc-50/50">
           {tabs.map(({ key, label, icon: Icon, count }) => (
             <button
               key={key}
               onClick={() => setTypeTab(key)}
-              className={`flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium transition-colors
+              className={`flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium transition-all duration-150
                 ${typeTab === key
-                  ? 'bg-indigo-50 text-indigo-700 border-r border-zinc-200 last:border-r-0'
-                  : 'bg-white text-zinc-500 hover:bg-zinc-50 border-r border-zinc-200 last:border-r-0'}`}
+                  ? 'bg-white text-indigo-600 shadow-sm'
+                  : 'text-zinc-400 hover:text-zinc-600'}`}
             >
               <Icon size={13} />
               {label}
-              <span className={`text-[10px] px-1 rounded-full ${typeTab === key ? 'bg-indigo-100 text-indigo-600' : 'bg-zinc-100 text-zinc-400'}`}>
+              <span className={`text-[10px] px-1.5 rounded-full ${typeTab === key ? 'bg-indigo-50 text-indigo-500' : 'bg-zinc-100 text-zinc-400'}`}>
                 {count}
               </span>
             </button>
@@ -116,7 +128,7 @@ export function AssetGallery() {
         <select
           value={accountFilter}
           onChange={(e) => setAccountFilter(e.target.value)}
-          className="h-8 rounded-md border border-zinc-200 bg-zinc-50 px-2 text-xs"
+          className="h-8 rounded-lg border border-zinc-100 bg-zinc-50/80 px-2 text-xs hover:border-zinc-200 transition-colors"
         >
           <option value="">全部账号</option>
           {accounts.map((a) => (
@@ -125,7 +137,7 @@ export function AssetGallery() {
         </select>
 
         <div className="flex-1" />
-        <Button size="sm" variant="outline" className="h-8 text-xs" onClick={handleScan}>
+        <Button size="sm" variant="outline" className="h-8 text-xs rounded-lg" onClick={handleScan}>
           <RefreshCw size={12} className="mr-1" />
           扫描
         </Button>
@@ -134,12 +146,16 @@ export function AssetGallery() {
       {/* Content */}
       <div className="flex-1 overflow-auto p-4">
         {loading ? (
-          <p className="text-zinc-400 text-sm text-center mt-8">加载中...</p>
+          <div>
+            {Array.from({ length: 3 }).map((_, i) => <AssetGroupSkeleton key={i} />)}
+          </div>
         ) : filteredGroups.length === 0 ? (
-          <div className="flex flex-col items-center justify-center mt-16 text-zinc-400">
-            <FolderOpen size={28} className="mb-2 opacity-40" />
-            <p className="text-sm">{typeTab === 'all' ? '暂无资产' : `暂无${typeTab === 'image' ? '图片' : '视频'}`}</p>
-            <p className="text-xs mt-1">点击"扫描"从 output 目录导入</p>
+          <div className="flex flex-col items-center justify-center mt-16 text-zinc-300">
+            <div className="w-16 h-16 rounded-2xl bg-zinc-50 flex items-center justify-center mb-4">
+              <FolderOpen size={24} strokeWidth={1.5} className="text-zinc-300" />
+            </div>
+            <p className="text-sm text-zinc-400">{typeTab === 'all' ? '暂无资产' : `暂无${typeTab === 'image' ? '图片' : '视频'}`}</p>
+            <p className="text-xs mt-1 text-zinc-300">点击「扫描」从 output 目录导入</p>
           </div>
         ) : (
           filteredGroups.map(([manifestPath, groupAssets]) => (

web/client/src/components/chat/ChatMessage.tsx

@@ -2,6 +2,8 @@ import { useState, useCallback } from 'react';
 import { cn } from '@/lib/utils';
 import { renderMarkdown } from '@/lib/markdown';
 import { Bot, User, Copy, Trash2, ChevronDown, ChevronRight, RefreshCw, ArrowRight, Quote, Brain } from 'lucide-react';
+import { ConfirmDialog } from '@/components/ui/confirm';
+import { useConfirm } from '@/hooks/useConfirm';
 import { useToast } from '@/hooks/useToast';
 import type { Message } from '@/types';
 
@@ -29,6 +31,7 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
   const isTool = message.role === 'tool';
   const [reasoningOpen, setReasoningOpen] = useState(false);
   const { toast } = useToast();
+  const { confirmState, confirm, handleConfirm, handleCancel } = useConfirm();
   const state = getState(message, !!isLast, !!isThinking);
 
   const handleCopy = useCallback(() => {
@@ -37,10 +40,15 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
     });
   }, [message.content, toast]);
 
-  const handleDelete = useCallback(() => {
-    if (!confirm('确定删除这条消息？')) return;
-    onDelete?.(message.id);
-  }, [message.id, onDelete]);
+  const handleDeleteClick = useCallback(async () => {
+    const ok = await confirm({
+      title: '删除消息',
+      description: '确定要删除这条消息吗？',
+      confirmText: '删除',
+      variant: 'danger',
+    });
+    if (ok) onDelete?.(message.id);
+  }, [message.id, onDelete, confirm]);
 
   // Tool messages
   if (isTool) {
@@ -138,7 +146,7 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
               className="flex items-center gap-1 px-1.5 py-0.5 rounded-md text-[10px] text-zinc-400 hover:text-zinc-600 hover:bg-zinc-100 transition-colors">
               <Quote size={10} />引用
             </button>
-            <button onClick={handleDelete}
+            <button onClick={handleDeleteClick}
               className="flex items-center gap-1 px-1.5 py-0.5 rounded-md text-[10px] text-zinc-400 hover:text-red-500 hover:bg-red-50 transition-colors">
               <Trash2 size={10} />删除
             </button>
@@ -153,6 +161,17 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
           </div>
         )}
       </div>
+
+      <ConfirmDialog
+        open={confirmState.open}
+        title={confirmState.title}
+        description={confirmState.description}
+        confirmText={confirmState.confirmText}
+        cancelText={confirmState.cancelText}
+        variant={confirmState.variant}
+        onConfirm={handleConfirm}
+        onCancel={handleCancel}
+      />
     </div>
   );
 }

web/client/src/components/layout/AppLayout.tsx

@@ -1,4 +1,5 @@
-import { useLocation } from 'react-router-dom';
+import { useEffect } from 'react';
+import { useLocation, useNavigate } from 'react-router-dom';
 import { Sidebar } from './Sidebar';
 import { MiddlePanel } from './MiddlePanel';
 import { ToastContainer } from '@/components/ui/Toast';
@@ -6,9 +7,24 @@ import { useToast } from '@/hooks/useToast';
 
 export function AppLayout({ children }: { children: React.ReactNode }) {
   const { pathname } = useLocation();
+  const navigate = useNavigate();
   const isChat = pathname.startsWith('/chat');
   const { toasts, dismiss } = useToast();
 
+  // Keyboard navigation: Escape to go back from detail views
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key !== 'Escape') return;
+      if (e.target instanceof HTMLInputElement || e.target instanceof HTMLTextAreaElement || e.target instanceof HTMLSelectElement) return;
+
+      if (pathname.startsWith('/accounts/') && pathname !== '/accounts') {
+        navigate('/accounts');
+      }
+    };
+    document.addEventListener('keydown', handleKeyDown);
+    return () => document.removeEventListener('keydown', handleKeyDown);
+  }, [pathname, navigate]);
+
   return (
     <div className="h-screen flex bg-white text-zinc-900 overflow-hidden">
       <Sidebar />

web/client/src/components/layout/MiddlePanel.tsx

@@ -1,6 +1,6 @@
 import { useState, useEffect, useMemo } from 'react';
 import { useNavigate, useLocation } from 'react-router-dom';
-import { Plus, Pin, Trash2, MessageCircle, Search } from 'lucide-react';
+import { Pin, Trash2, MessageCircle, Search, Sparkles } from 'lucide-react';
 import { Input } from '@/components/ui/input';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { ConfirmDialog } from '@/components/ui/confirm';
@@ -16,7 +16,6 @@ export function MiddlePanel() {
   const location = useLocation();
   const { toast } = useToast();
   const { confirmState, confirm, handleConfirm, handleCancel } = useConfirm();
-  const [pendingDeleteId, setPendingDeleteId] = useState<string | null>(null);
 
   const conversationId = useMemo(() => {
     const match = location.pathname.match(/^\/chat\/(.+)$/);
@@ -50,13 +49,20 @@ export function MiddlePanel() {
     loadConversations();
   };
 
-  const handleDelete = async (id: string, e: React.MouseEvent) => {
+  const handleDeleteClick = async (id: string, e: React.MouseEvent) => {
     e.stopPropagation();
-    if (!confirm('确定删除这个对话？')) return;
-    await api.deleteConversation(id);
-    loadConversations();
-    toast('对话已删除', 'success');
-    if (id === conversationId) navigate('/chat');
+    const ok = await confirm({
+      title: '删除对话',
+      description: '确定要删除这个对话吗？此操作无法撤销。',
+      confirmText: '删除',
+      variant: 'danger',
+    });
+    if (ok) {
+      await api.deleteConversation(id);
+      loadConversations();
+      toast('对话已删除', 'success');
+      if (id === conversationId) navigate('/chat');
+    }
   };
 
   const formatDate = (d: string) => {
@@ -68,73 +74,166 @@ export function MiddlePanel() {
     return date.toLocaleDateString('zh-CN', { month: 'short', day: 'numeric' });
   };
 
+  // Split pinned and unpinned
+  const pinned = conversations.filter((c) => c.pinned);
+  const unpinned = conversations.filter((c) => !c.pinned);
+
+  // Group unpinned by time bucket
+  const now = new Date();
+  const todayStart = new Date(now.getFullYear(), now.getMonth(), now.getDate()).getTime();
+  const yesterdayStart = todayStart - 86400000;
+  const weekStart = todayStart - 6 * 86400000;
+
+  type Bucket = { label: string; items: typeof unpinned };
+  const buckets: Bucket[] = [
+    { label: '今天', items: [] },
+    { label: '昨天', items: [] },
+    { label: '7 天内', items: [] },
+    { label: '更早', items: [] },
+  ];
+  for (const c of unpinned) {
+    const t = new Date(c.updated_at).getTime();
+    if (t >= todayStart) buckets[0].items.push(c);
+    else if (t >= yesterdayStart) buckets[1].items.push(c);
+    else if (t >= weekStart) buckets[2].items.push(c);
+    else buckets[3].items.push(c);
+  }
+
   return (
-    <aside className="w-60 flex flex-col border-r border-zinc-100 bg-white">
-      <div className="p-3 flex items-center gap-2 border-b border-zinc-100/80">
-        <div className="relative flex-1">
+    <aside className="w-60 flex flex-col border-r border-zinc-100 bg-zinc-50/40">
+      {/* Top control zone — elevated card feel */}
+      <div className="px-3 pt-3 pb-3 bg-white/80 backdrop-blur-sm border-b border-zinc-100">
+        {/* Search */}
+        <div className="relative">
           <Search size={13} className="absolute left-2.5 top-1/2 -translate-y-1/2 text-zinc-300" />
           <Input
             placeholder="搜索对话..."
-            className="h-8 text-xs bg-zinc-50/80 border-zinc-100 pl-8 focus:bg-white"
+            className="h-8 text-xs bg-zinc-100/80 border-transparent pl-8 rounded-xl focus:bg-white focus:border-indigo-200 focus:ring-1 focus:ring-indigo-200/50 transition-all"
             value={search}
             onChange={(e) => handleSearch(e.target.value)}
           />
         </div>
+
+        {/* New conversation */}
         <button
           onClick={() => navigate('/chat')}
-          className="flex items-center gap-1 px-3 py-1.5 rounded-lg bg-indigo-600 text-white text-xs font-medium hover:bg-indigo-700 transition-colors whitespace-nowrap shadow-sm shadow-indigo-200/50"
+          className="w-full mt-2.5 flex items-center gap-2.5 px-3 py-2 rounded-xl bg-gradient-to-r from-indigo-500 to-indigo-600 text-white text-xs font-medium hover:from-indigo-600 hover:to-indigo-700 transition-all duration-200 shadow-md shadow-indigo-200/50 active:scale-[0.98]"
         >
-          <Plus size={13} />
-          新对话
+          <div className="w-6 h-6 rounded-lg bg-white/20 flex items-center justify-center flex-shrink-0">
+            <Sparkles size={13} />
+          </div>
+          <span>新建对话</span>
         </button>
       </div>
-      <ScrollArea className="flex-1">
-        {conversations.map((conv) => (
-          <div
-            key={conv.id}
-            onClick={() => navigate(`/chat/${conv.id}`)}
-            className={`group w-full text-left px-3 py-2.5 transition-all duration-150 cursor-pointer
-              ${conv.id === conversationId
-                ? 'bg-indigo-50/60 border-l-2 border-l-indigo-500'
-                : 'hover:bg-zinc-50/80 border-l-2 border-l-transparent'}`}
-          >
-            <div className="flex items-center gap-1.5">
-              {conv.pinned ? <Pin size={11} className="text-indigo-400 flex-shrink-0" /> : null}
-              <div className={`text-sm truncate flex-1 ${conv.id === conversationId ? 'text-indigo-700 font-medium' : 'text-zinc-600'}`}>
-                {conv.title}
-              </div>
-              <div className="opacity-0 group-hover:opacity-100 flex gap-0.5 transition-opacity duration-150 flex-shrink-0">
-                <button
-                  onClick={(e) => handleTogglePin(conv.id, e)}
-                  className={`p-1 rounded-md transition-colors ${conv.pinned ? 'text-indigo-400' : 'text-zinc-300 hover:text-zinc-500 hover:bg-zinc-100'}`}
-                  title={conv.pinned ? '取消置顶' : '置顶'}
-                >
-                  <Pin size={12} />
-                </button>
-                <button
-                  onClick={(e) => handleDelete(conv.id, e)}
-                  className="p-1 rounded-md text-zinc-300 hover:text-red-500 hover:bg-red-50 transition-colors"
-                  title="删除"
-                >
-                  <Trash2 size={12} />
-                </button>
-              </div>
+
+      {/* Conversation list — recessed zone */}
+      <ScrollArea className="flex-1 px-2 py-1.5">
+        {pinned.length > 0 && (
+          <>
+            <p className="px-2 pt-1.5 pb-1 text-[10px] text-zinc-400 font-medium tracking-wider">置顶</p>
+            {pinned.map((conv) => (
+              <ConversationItem
+                key={conv.id}
+                conv={conv}
+                isActive={conv.id === conversationId}
+                onNavigate={() => navigate(`/chat/${conv.id}`)}
+                onTogglePin={(e) => handleTogglePin(conv.id, e)}
+                onDelete={(e) => handleDeleteClick(conv.id, e)}
+                formatDate={formatDate}
+              />
+            ))}
+            <div className="my-1.5 mx-2 border-t border-zinc-200/60" />
+          </>
+        )}
+        {buckets.map((bucket) =>
+          bucket.items.length > 0 ? (
+            <div key={bucket.label}>
+              <p className="px-2 pt-2 pb-1 text-[10px] text-zinc-400 font-medium tracking-wider">{bucket.label}</p>
+              {bucket.items.map((conv) => (
+                <ConversationItem
+                  key={conv.id}
+                  conv={conv}
+                  isActive={conv.id === conversationId}
+                  onNavigate={() => navigate(`/chat/${conv.id}`)}
+                  onTogglePin={(e) => handleTogglePin(conv.id, e)}
+                  onDelete={(e) => handleDeleteClick(conv.id, e)}
+                  formatDate={formatDate}
+                />
+              ))}
             </div>
-            <div className="mt-0.5">
-              <span className="text-[10px] text-zinc-300">
-                {formatDate(conv.updated_at)}
-              </span>
-            </div>
-          </div>
-        ))}
+          ) : null
+        )}
         {conversations.length === 0 && (
-          <div className="flex flex-col items-center justify-center mt-16 text-zinc-300">
-            <MessageCircle size={28} className="mb-3 opacity-30" strokeWidth={1.5} />
+          <div className="flex flex-col items-center justify-center pt-20 text-zinc-300">
+            <div className="w-12 h-12 rounded-2xl bg-white flex items-center justify-center mb-3 shadow-sm">
+              <MessageCircle size={20} strokeWidth={1.5} className="text-zinc-300" />
+            </div>
             <p className="text-xs text-zinc-400">暂无对话</p>
-            <p className="text-[10px] mt-1 text-zinc-300">点击上方「新对话」开始</p>
           </div>
         )}
       </ScrollArea>
+
+      <ConfirmDialog
+        open={confirmState.open}
+        title={confirmState.title}
+        description={confirmState.description}
+        confirmText={confirmState.confirmText}
+        cancelText={confirmState.cancelText}
+        variant={confirmState.variant}
+        onConfirm={handleConfirm}
+        onCancel={handleCancel}
+      />
     </aside>
   );
 }
+
+/* Individual conversation bubble item */
+function ConversationItem({
+  conv,
+  isActive,
+  onNavigate,
+  onTogglePin,
+  onDelete,
+  formatDate,
+}: {
+  conv: { id: string; title: string; pinned?: number; updated_at: string };
+  isActive: boolean;
+  onNavigate: () => void;
+  onTogglePin: (e: React.MouseEvent) => void;
+  onDelete: (e: React.MouseEvent) => void;
+  formatDate: (d: string) => string;
+}) {
+  return (
+    <div
+      onClick={onNavigate}
+      className={`group my-0.5 rounded-xl px-3 py-2 transition-all duration-200 cursor-pointer
+        ${isActive
+          ? 'bg-white ring-1 ring-indigo-200/60 shadow-sm shadow-indigo-100/30'
+          : 'hover:bg-white hover:shadow-sm hover:shadow-zinc-200/40'}`}
+    >
+      <div className="flex items-center gap-1.5">
+        {conv.pinned ? <Pin size={10} className="text-indigo-400 flex-shrink-0" /> : null}
+        <span className={`text-[13px] truncate flex-1 leading-snug ${isActive ? 'text-indigo-700 font-medium' : 'text-zinc-600'}`}>
+          {conv.title}
+        </span>
+        <div className="opacity-0 group-hover:opacity-100 flex gap-0.5 transition-opacity duration-150 flex-shrink-0">
+          <button
+            onClick={onTogglePin}
+            className={`p-0.5 rounded-md transition-colors ${conv.pinned ? 'text-indigo-400' : 'text-zinc-300 hover:text-zinc-500 hover:bg-zinc-100'}`}
+            title={conv.pinned ? '取消置顶' : '置顶'}
+          >
+            <Pin size={12} />
+          </button>
+          <button
+            onClick={onDelete}
+            className="p-0.5 rounded-md text-zinc-300 hover:text-red-500 hover:bg-red-50 transition-colors"
+            title="删除"
+          >
+            <Trash2 size={12} />
+          </button>
+        </div>
+      </div>
+      <span className="text-[10px] text-zinc-300 mt-0.5 block">{formatDate(conv.updated_at)}</span>
+    </div>
+  );
+}