feat(web): 重构组件样式并添加确认对话框组件

- 优化组件视觉风格: 使用渐变色、阴影和圆角增强现代感
- 添加 ConfirmDialog 组件和 useConfirm hook 用于确认操作
- 改进聊天界面: 添加滚动到底部按钮、斜杠命令自动弹出
- 统一组件间距和颜色方案，提升 UI 一致性

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

@@ -1,4 +1,4 @@
-import { Video, Image, Square } from 'lucide-react';
+import { Video, Image } from 'lucide-react';
 import type { Account } from '@/types';
 
 const MODEL_LABELS: Record<string, string> = {
@@ -23,16 +23,16 @@ export function AccountCard({ account, isSelected, onClick }: Props) {
   return (
     <button
       onClick={onClick}
-      className={`w-full text-left rounded-xl border p-4 transition-all cursor-pointer group
+      className={`w-full text-left rounded-xl p-4 transition-all duration-200 cursor-pointer group
         ${isSelected
-          ? 'border-indigo-400 bg-indigo-50 shadow-sm'
-          : 'border-zinc-200 bg-white hover:border-indigo-300 hover:shadow-md'}`}
+          ? 'bg-indigo-50/80 ring-1 ring-indigo-200 shadow-sm shadow-indigo-100/50'
+          : 'bg-white border border-zinc-100 hover:border-zinc-200 hover:shadow-lg hover:shadow-zinc-100/80 hover:-translate-y-0.5'}`}
     >
       {/* Top: name + format badge */}
       <div className="flex items-start justify-between mb-2">
         <h3 className="font-semibold text-sm text-zinc-800 truncate flex-1 mr-2">{account.name}</h3>
-        <span className={`text-[10px] font-mono px-1.5 py-0.5 rounded ${
-          isSelected ? 'bg-indigo-200 text-indigo-700' : 'bg-zinc-100 text-zinc-500'
+        <span className={`text-[10px] font-mono px-2 py-0.5 rounded-full ${
+          isSelected ? 'bg-indigo-100 text-indigo-600' : 'bg-zinc-100 text-zinc-500'
         }`}>
           {formatBadge}
         </span>
@@ -40,21 +40,21 @@ export function AccountCard({ account, isSelected, onClick }: Props) {
 
       {/* Description */}
       {account.description && (
-        <p className="text-xs text-zinc-500 line-clamp-2 mb-3">{account.description}</p>
+        <p className="text-xs text-zinc-400 line-clamp-2 mb-3 leading-relaxed">{account.description}</p>
       )}
 
       {/* Tags */}
       <div className="flex items-center gap-1.5 flex-wrap">
-        <span className="inline-flex items-center gap-0.5 text-[10px] px-1.5 py-0.5 rounded bg-blue-50 text-blue-600">
+        <span className="inline-flex items-center gap-1 text-[10px] px-2 py-0.5 rounded-full bg-blue-50/80 text-blue-600">
           <Image size={10} />
           {MODEL_LABELS[account.imageModel] || account.imageModel}
         </span>
-        <span className="inline-flex items-center gap-0.5 text-[10px] px-1.5 py-0.5 rounded bg-purple-50 text-purple-600">
+        <span className="inline-flex items-center gap-1 text-[10px] px-2 py-0.5 rounded-full bg-violet-50/80 text-violet-600">
           <Video size={10} />
           {MODEL_LABELS[account.videoModel] || account.videoModel}
         </span>
         {account.ttsVoice && (
-          <span className="text-[10px] px-1.5 py-0.5 rounded bg-green-50 text-green-600">
+          <span className="text-[10px] px-2 py-0.5 rounded-full bg-emerald-50/80 text-emerald-600">
             TTS
           </span>
         )}

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

@@ -21,12 +21,12 @@ export function AssetProjectGroup({ title, subtitle, assets, onPreview, onDelete
         {subtitle && <span className="text-[10px] text-zinc-400">{subtitle}</span>}
         <div className="flex items-center gap-2 ml-auto text-[10px] text-zinc-400">
           {images.length > 0 && (
-            <span className="inline-flex items-center gap-0.5">
+            <span className="inline-flex items-center gap-0.5 px-1.5 py-0.5 rounded-full bg-blue-50/60 text-blue-500">
               <ImageIcon size={10} /> {images.length}
             </span>
           )}
           {videos.length > 0 && (
-            <span className="inline-flex items-center gap-0.5">
+            <span className="inline-flex items-center gap-0.5 px-1.5 py-0.5 rounded-full bg-violet-50/60 text-violet-500">
               <Film size={10} /> {videos.length}
             </span>
           )}
@@ -34,11 +34,11 @@ export function AssetProjectGroup({ title, subtitle, assets, onPreview, onDelete
       </div>
 
       {/* Asset strip */}
-      <div className="flex gap-2 overflow-x-auto pb-2">
+      <div className="flex gap-2.5 overflow-x-auto pb-2">
         {assets.map((asset) => (
           <div
             key={asset.id}
-            className="group relative flex-shrink-0 w-24 h-24 bg-zinc-100 rounded-lg overflow-hidden cursor-pointer border border-zinc-200 hover:border-indigo-300 hover:shadow-sm transition-all"
+            className="group relative flex-shrink-0 w-28 h-28 bg-zinc-100 rounded-xl overflow-hidden cursor-pointer border border-zinc-100 hover:shadow-lg hover:shadow-zinc-200/60 hover:-translate-y-0.5 transition-all duration-200"
             onClick={() => onPreview(asset)}
           >
             {asset.type === 'image' ? (
@@ -49,8 +49,8 @@ export function AssetProjectGroup({ title, subtitle, assets, onPreview, onDelete
                 loading="lazy"
               />
             ) : (
-              <div className="w-full h-full flex items-center justify-center bg-zinc-800">
-                <Film size={20} className="text-zinc-400" />
+              <div className="w-full h-full flex items-center justify-center bg-gradient-to-br from-zinc-800 to-zinc-900">
+                <Film size={20} className="text-zinc-500" />
                 <video
                   src={`/api/assets/file?path=${encodeURIComponent(asset.file_path)}`}
                   className="absolute inset-0 w-full h-full object-cover"
@@ -61,12 +61,12 @@ export function AssetProjectGroup({ title, subtitle, assets, onPreview, onDelete
             )}
             <button
               onClick={(e) => { e.stopPropagation(); if (confirm('确定删除这个资产？')) onDelete(asset.id); }}
-              className="absolute top-1 right-1 p-0.5 rounded bg-white/80 opacity-0 group-hover:opacity-100 transition-opacity shadow-sm"
+              className="absolute top-1.5 right-1.5 p-1 rounded-lg bg-white/90 opacity-0 group-hover:opacity-100 transition-all duration-200 shadow-sm hover:bg-red-50"
             >
               <Trash2 size={10} className="text-red-500" />
             </button>
-            <div className="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/40 to-transparent px-1 py-0.5">
-              <span className="text-[8px] text-white">
+            <div className="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/50 to-transparent px-1.5 py-1">
+              <span className="text-[9px] text-white/80 font-medium">
                 {asset.type === 'image' ? 'IMG' : 'VID'} #{asset.shot_index ?? '?'}
               </span>
             </div>

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

@@ -1,5 +1,5 @@
-import { useState, useRef } from 'react';
-import { Send, Terminal, Image, Play, FileText, ArrowUp } from 'lucide-react';
+import { useState, useRef, useEffect } from 'react';
+import { Terminal, Image, Play, FileText, ArrowUp } from 'lucide-react';
 
 const SLASH_COMMANDS = [
   { cmd: '/run', desc: '执行 pipeline 阶段', icon: Play },
@@ -19,6 +19,16 @@ export function ChatInput({ onSend, disabled }: { onSend: (content: string) => v
     ? SLASH_COMMANDS.filter((c) => c.cmd.startsWith(input.split(' ')[0]))
     : [];
 
+  // Auto-show/hide slash command menu
+  useEffect(() => {
+    if (input.startsWith('/') && matchingCmds.length > 0) {
+      setShowCmds(true);
+      setCmdIdx(0);
+    } else {
+      setShowCmds(false);
+    }
+  }, [input, matchingCmds.length]);
+
   const handleSend = () => {
     if (!input.trim() || disabled) return;
     onSend(input.trim());

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

@@ -60,19 +60,21 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
     <div className={cn('flex gap-3 mb-5 group/msg', isUser ? 'flex-row-reverse' : 'flex-row')}>
       {/* Avatar */}
       <div className={cn(
-        'w-7 h-7 rounded-full flex items-center justify-center flex-shrink-0 text-xs',
-        isUser ? 'bg-indigo-600 text-white' : 'bg-zinc-100 text-zinc-500'
+        'w-8 h-8 rounded-full flex items-center justify-center flex-shrink-0 text-xs',
+        isUser
+          ? 'bg-gradient-to-br from-indigo-500 to-indigo-600 text-white shadow-sm'
+          : 'bg-zinc-100 text-zinc-500'
       )}>
-        {isUser ? <User size={13} /> : <Bot size={13} />}
+        {isUser ? <User size={14} /> : <Bot size={14} />}
       </div>
 
       {/* Body */}
       <div className={cn('flex-1 max-w-[78%]', isUser && 'flex flex-col items-end')}>
         {/* Thinking indicator */}
         {state === 'thinking' && !message.content && !message.reasoningContent && (
-          <div className="rounded-2xl px-3.5 py-2.5 bg-zinc-50 border border-zinc-100 rounded-tl-md">
+          <div className="rounded-2xl px-4 py-3 bg-gradient-to-br from-indigo-50 to-zinc-50 border border-indigo-100/50 rounded-tl-sm">
             <div className="flex items-center gap-2 text-zinc-400 text-sm">
-              <Brain size={14} className="animate-pulse" />
+              <Brain size={14} className="animate-pulse text-indigo-400" />
               <span>深度思考中...</span>
             </div>
           </div>
@@ -96,7 +98,7 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
               )}
             </button>
             {(reasoningOpen || state !== 'done') && (
-              <div className="mt-1 px-3 py-2 rounded-lg bg-indigo-50/50 border border-indigo-100 text-xs text-zinc-500 leading-relaxed max-h-60 overflow-y-auto whitespace-pre-wrap">
+              <div className="mt-1 px-3 py-2.5 rounded-xl bg-gradient-to-br from-indigo-50/80 to-violet-50/40 border border-indigo-100/50 text-xs text-zinc-500 leading-relaxed max-h-60 overflow-y-auto whitespace-pre-wrap">
                 {message.reasoningContent}
               </div>
             )}
@@ -106,16 +108,16 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
         {/* Main content bubble */}
         {!(message.content === '(调用工具)' && state === 'done' && message.reasoningContent) && (
           <div className={cn(
-            'rounded-2xl px-3.5 py-2.5 text-sm leading-relaxed',
+            'rounded-2xl px-4 py-2.5 text-sm leading-relaxed',
             isUser
-              ? 'bg-indigo-600 text-white rounded-tr-md'
-              : 'bg-zinc-50 text-zinc-700 border border-zinc-100 rounded-tl-md'
+              ? 'bg-gradient-to-br from-indigo-500 to-indigo-600 text-white rounded-tr-sm shadow-sm'
+              : 'bg-zinc-50/80 text-zinc-700 border border-zinc-100 rounded-tl-sm'
           )}>
             {state === 'streaming' && !message.content ? (
-              <div className="flex items-center gap-1 text-zinc-400">
-                <span className="inline-block w-1.5 h-1.5 bg-zinc-300 rounded-full animate-pulse" />
-                <span className="inline-block w-1.5 h-1.5 bg-zinc-300 rounded-full animate-pulse [animation-delay:100ms]" />
-                <span className="inline-block w-1.5 h-1.5 bg-zinc-300 rounded-full animate-pulse [animation-delay:200ms]" />
+              <div className="flex items-center gap-1.5 text-zinc-400">
+                <span className="inline-block w-1.5 h-1.5 bg-indigo-300 rounded-full animate-pulse" />
+                <span className="inline-block w-1.5 h-1.5 bg-indigo-300 rounded-full animate-pulse [animation-delay:150ms]" />
+                <span className="inline-block w-1.5 h-1.5 bg-indigo-300 rounded-full animate-pulse [animation-delay:300ms]" />
               </div>
             ) : isUser ? (
               <p className="whitespace-pre-wrap">{message.content}</p>
@@ -125,27 +127,27 @@ export function ChatMessage({ message, isLast, isThinking, onRegenerate, onConti
           </div>
         )}
 
-        {/* Actions - visible on hover or when done */}
+        {/* Actions */}
         {showActions && (
-          <div className="flex gap-0.5 mt-1 opacity-0 group-hover/msg:opacity-100 transition-opacity px-1">
+          <div className="flex gap-0.5 mt-1 opacity-0 group-hover/msg:opacity-100 transition-opacity duration-200 px-1">
             <button onClick={handleCopy}
-              className="flex items-center gap-1 px-1.5 py-0.5 rounded text-[10px] text-zinc-400 hover:text-zinc-600 hover:bg-zinc-100 transition-colors">
+              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">
               <Copy size={10} />复制
             </button>
             <button onClick={() => onQuote?.(message.content)}
-              className="flex items-center gap-1 px-1.5 py-0.5 rounded text-[10px] text-zinc-400 hover:text-zinc-600 hover:bg-zinc-100 transition-colors">
+              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}
-              className="flex items-center gap-1 px-1.5 py-0.5 rounded text-[10px] text-zinc-400 hover:text-red-500 hover:bg-red-50 transition-colors">
+              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>
             <button onClick={() => onRegenerate?.(message.id)}
-              className="flex items-center gap-1 px-1.5 py-0.5 rounded text-[10px] text-zinc-400 hover:text-zinc-600 hover:bg-zinc-100 transition-colors">
+              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">
               <RefreshCw size={10} />重新生成
             </button>
             <button onClick={() => onContinue?.()}
-              className="flex items-center gap-1 px-1.5 py-0.5 rounded text-[10px] text-zinc-400 hover:text-zinc-600 hover:bg-zinc-100 transition-colors">
+              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">
               <ArrowRight size={10} />继续
             </button>
           </div>

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

@@ -6,7 +6,7 @@ import { ChatMessage } from './ChatMessage';
 import { ChatInput } from './ChatInput';
 import { PipelineProgress } from './PipelineProgress';
 import { Button } from '@/components/ui/button';
-import { RefreshCw, Loader2, StopCircle, X, MessageCircle } from 'lucide-react';
+import { RefreshCw, Loader2, StopCircle, X, MessageCircle, ArrowDown } from 'lucide-react';
 import { api } from '@/lib/api';
 import type { Account, Message } from '@/types';
 
@@ -19,6 +19,7 @@ export function ChatView() {
   const [accounts, setAccounts] = useState<Account[]>([]);
   const [quote, setQuote] = useState<string | null>(null);
   const [pendingMessage, setPendingMessage] = useState<string | null>(null);
+  const [showScrollBtn, setShowScrollBtn] = useState(false);
   const creatingRef = useRef(false);
   const scrollRef = useRef<HTMLDivElement>(null);
   const userScrolledUp = useRef(false);
@@ -54,6 +55,7 @@ export function ChatView() {
     const onScroll = () => {
       const atBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 80;
       userScrolledUp.current = !atBottom;
+      setShowScrollBtn(!atBottom);
     };
     el.addEventListener('scroll', onScroll, { passive: true });
     return () => el.removeEventListener('scroll', onScroll);
@@ -62,6 +64,7 @@ export function ChatView() {
   // Reset scroll state on conversation switch
   useEffect(() => {
     userScrolledUp.current = false;
+    setShowScrollBtn(false);
   }, [conversationId]);
 
   // After navigating to a new conversation, send the pending message once history is loaded
@@ -137,9 +140,12 @@ export function ChatView() {
   if (!conversationId) {
     const recentConvs = conversations.slice(0, 5);
     return (
-      <div className="flex-1 flex flex-col items-center justify-center bg-white">
+      <div className="flex-1 flex flex-col items-center justify-center bg-gradient-to-b from-white to-zinc-50/30">
         <div className="w-full max-w-xl px-4">
           <div className="text-center mb-6">
+            <div className="w-14 h-14 rounded-2xl bg-gradient-to-br from-indigo-50 to-violet-50 flex items-center justify-center mx-auto mb-4 shadow-sm">
+              <MessageCircle size={24} className="text-indigo-400" strokeWidth={1.5} />
+            </div>
             <h2 className="text-lg font-semibold text-zinc-800">开始新对话</h2>
             <p className="text-sm text-zinc-400 mt-1">输入消息开始创作，对话将自动创建</p>
           </div>
@@ -150,7 +156,7 @@ export function ChatView() {
               <select
                 value={selectedAccountId || ''}
                 onChange={(e) => useAppStore.getState().setSelectedAccountId(e.target.value || null)}
-                className="h-7 rounded-md border border-zinc-200 bg-white px-2.5 text-xs text-zinc-600"
+                className="h-7 rounded-lg border border-zinc-100 bg-white px-2.5 text-xs text-zinc-600 hover:border-zinc-200 transition-colors"
               >
                 <option value="">不指定</option>
                 {accounts.map((a) => <option key={a.id} value={a.id}>{a.name}</option>)}
@@ -164,7 +170,7 @@ export function ChatView() {
                 <button
                   key={conv.id}
                   onClick={() => navigate(`/chat/${conv.id}`)}
-                  className="w-full flex items-center gap-2 px-3 py-2 rounded-lg text-left hover:bg-zinc-50 transition-colors group"
+                  className="w-full flex items-center gap-2 px-3 py-2 rounded-xl text-left hover:bg-zinc-50/80 transition-colors group"
                 >
                   <MessageCircle size={13} className="text-zinc-300 flex-shrink-0" />
                   <span className="text-sm text-zinc-600 truncate flex-1 group-hover:text-zinc-800">{conv.title}</span>
@@ -184,19 +190,19 @@ export function ChatView() {
   return (
     <div className="flex-1 flex flex-col bg-white h-full">
       {/* Header bar */}
-      <div className="px-4 py-2 border-b border-zinc-200 flex items-center justify-between flex-shrink-0">
-        <div className="flex items-center gap-1.5">
-          <div className={`w-1.5 h-1.5 rounded-full ${connected ? 'bg-green-500' : 'bg-red-400'}`} />
+      <div className="px-4 py-2 border-b border-zinc-100 flex items-center justify-between flex-shrink-0">
+        <div className="flex items-center gap-2">
+          <div className={`w-2 h-2 rounded-full ${connected ? 'bg-emerald-400 shadow-sm shadow-emerald-200' : 'bg-red-400 animate-pulse'}`} />
           <span className="text-xs text-zinc-400">{connected ? '在线' : '连接中'}</span>
         </div>
         <div className="flex items-center gap-2">
           {manifestPath && (
-            <Button size="sm" variant="outline" className="h-7 text-xs" onClick={handleResume}>
+            <Button size="sm" variant="outline" className="h-7 text-xs rounded-lg" onClick={handleResume}>
               <RefreshCw size={12} className="mr-1" />断点续跑
             </Button>
           )}
           {thinking && (
-            <Button size="sm" variant="outline" className="h-7 text-xs text-red-500 border-red-200 hover:bg-red-50" onClick={handleStop}>
+            <Button size="sm" variant="outline" className="h-7 text-xs text-red-500 border-red-200 hover:bg-red-50 rounded-lg" onClick={handleStop}>
               <StopCircle size={12} className="mr-1" />停止
             </Button>
           )}
@@ -204,7 +210,7 @@ export function ChatView() {
       </div>
 
       {/* Chat area */}
-      <div className="flex-1 overflow-hidden">
+      <div className="flex-1 overflow-hidden relative">
         <div className="h-full flex flex-col">
           {/* Message list */}
           <div ref={scrollRef} className="flex-1 overflow-y-auto px-4 py-4">
@@ -235,15 +241,29 @@ export function ChatView() {
 
             {thinking && !pipeline && (
               <div className="flex items-center gap-2 text-zinc-400 text-sm py-2">
-                <Loader2 size={14} className="animate-spin" />
+                <Loader2 size={14} className="animate-spin text-indigo-400" />
                 {toolStatus || '思考中...'}
               </div>
             )}
           </div>
 
+          {/* Scroll to bottom FAB */}
+          {showScrollBtn && (
+            <button
+              onClick={() => {
+                scrollRef.current?.scrollTo({ top: scrollRef.current.scrollHeight, behavior: 'smooth' });
+                userScrolledUp.current = false;
+                setShowScrollBtn(false);
+              }}
+              className="absolute bottom-4 left-1/2 -translate-x-1/2 w-9 h-9 rounded-full bg-white border border-zinc-200 shadow-lg shadow-zinc-200/60 flex items-center justify-center text-zinc-400 hover:text-zinc-700 hover:border-zinc-300 hover:shadow-xl transition-all"
+            >
+              <ArrowDown size={16} />
+            </button>
+          )}
+
           {/* Quote bar */}
           {quote && (
-            <div className="mx-4 px-3 py-1.5 bg-zinc-50 border border-zinc-200 rounded-lg flex items-center gap-2 text-xs text-zinc-500 flex-shrink-0">
+            <div className="mx-4 px-3 py-1.5 bg-indigo-50/60 border border-indigo-100/50 rounded-xl flex items-center gap-2 text-xs text-zinc-500 flex-shrink-0">
               <span className="flex-1 truncate">引用: {quote}</span>
               <button onClick={() => setQuote(null)} className="text-zinc-400 hover:text-zinc-600"><X size={12} /></button>
             </div>

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

@@ -18,24 +18,24 @@ export function PipelineProgress({ phase, progress, currentItem, totalItems, sta
   };
 
   return (
-    <div className="bg-zinc-900 border border-zinc-800 rounded-lg p-3 my-2">
-      <div className="flex items-center justify-between mb-1.5">
-        <span className="text-xs text-zinc-400">
+    <div className="bg-gradient-to-br from-zinc-900 to-zinc-800 border border-zinc-700/50 rounded-xl p-3.5 my-2 shadow-lg shadow-zinc-900/20">
+      <div className="flex items-center justify-between mb-2">
+        <span className="text-xs text-zinc-400 font-medium">
           {phaseLabel[phase] || phase}
           {currentItem && totalItems ? ` (${currentItem}/${totalItems})` : ''}
         </span>
-        <span className="text-xs text-zinc-500">{progress}%</span>
+        <span className="text-xs font-mono text-zinc-500">{progress}%</span>
       </div>
-      <div className="w-full h-1.5 bg-zinc-800 rounded-full overflow-hidden">
+      <div className="w-full h-1.5 bg-zinc-700/50 rounded-full overflow-hidden">
         <div
           className={cn(
-            'h-full rounded-full transition-all duration-500',
-            progress < 100 ? 'bg-blue-500' : 'bg-green-500'
+            'h-full rounded-full transition-all duration-700 ease-out',
+            progress < 100 ? 'bg-gradient-to-r from-blue-500 to-indigo-400' : 'bg-gradient-to-r from-emerald-500 to-green-400'
           )}
           style={{ width: `${progress}%` }}
         />
       </div>
-      {status && <p className="text-xs text-zinc-500 mt-1">{status}</p>}
+      {status && <p className="text-xs text-zinc-500 mt-1.5">{status}</p>}
     </div>
   );
 }

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

@@ -13,7 +13,7 @@ export function AppLayout({ children }: { children: React.ReactNode }) {
     <div className="h-screen flex bg-white text-zinc-900 overflow-hidden">
       <Sidebar />
       {isChat && <MiddlePanel />}
-      <main className="flex-1 flex flex-col min-w-0 bg-zinc-50">
+      <main className="flex-1 flex flex-col min-w-0 bg-gradient-to-br from-zinc-50/50 to-white">
         {children}
       </main>
       <ToastContainer toasts={toasts} dismiss={dismiss} />

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

@@ -3,9 +3,11 @@ import { useNavigate, useLocation } from 'react-router-dom';
 import { Plus, Pin, Trash2, MessageCircle, Search } from 'lucide-react';
 import { Input } from '@/components/ui/input';
 import { ScrollArea } from '@/components/ui/scroll-area';
+import { ConfirmDialog } from '@/components/ui/confirm';
 import { useAppStore } from '@/store';
 import { api } from '@/lib/api';
 import { useToast } from '@/hooks/useToast';
+import { useConfirm } from '@/hooks/useConfirm';
 
 export function MiddlePanel() {
   const { conversations, setConversations } = useAppStore();
@@ -13,6 +15,8 @@ export function MiddlePanel() {
   const navigate = useNavigate();
   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\/(.+)$/);
@@ -65,20 +69,20 @@ export function MiddlePanel() {
   };
 
   return (
-    <aside className="w-60 flex flex-col border-r border-zinc-200 bg-white">
-      <div className="p-3 flex items-center gap-2 border-b border-zinc-100">
+    <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">
-          <Search size={13} className="absolute left-2.5 top-1/2 -translate-y-1/2 text-zinc-400" />
+          <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 border-zinc-200 pl-8"
+            className="h-8 text-xs bg-zinc-50/80 border-zinc-100 pl-8 focus:bg-white"
             value={search}
             onChange={(e) => handleSearch(e.target.value)}
           />
         </div>
         <button
           onClick={() => navigate('/chat')}
-          className="flex items-center gap-1 px-3 py-1.5 rounded-md bg-indigo-600 text-white text-xs font-medium hover:bg-indigo-700 transition-colors whitespace-nowrap"
+          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"
         >
           <Plus size={13} />
           新对话
@@ -89,27 +93,27 @@ export function MiddlePanel() {
           <div
             key={conv.id}
             onClick={() => navigate(`/chat/${conv.id}`)}
-            className={`group w-full text-left px-3 py-2.5 border-b border-zinc-50 transition-colors cursor-pointer
+            className={`group w-full text-left px-3 py-2.5 transition-all duration-150 cursor-pointer
               ${conv.id === conversationId
-                ? 'bg-indigo-50 border-l-[3px] border-l-indigo-600'
-                : 'hover:bg-zinc-50 border-l-[3px] border-l-transparent'}`}
+                ? '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-500 flex-shrink-0" /> : null}
-              <div className={`text-sm truncate flex-1 ${conv.id === conversationId ? 'text-indigo-700 font-medium' : 'text-zinc-700'}`}>
+              {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 flex-shrink-0">
+              <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 hover:bg-zinc-200 transition-colors ${conv.pinned ? 'text-indigo-500' : 'text-zinc-400'}`}
+                  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 hover:bg-red-100 text-zinc-400 hover:text-red-500 transition-colors"
+                  className="p-1 rounded-md text-zinc-300 hover:text-red-500 hover:bg-red-50 transition-colors"
                   title="删除"
                 >
                   <Trash2 size={12} />
@@ -124,10 +128,10 @@ export function MiddlePanel() {
           </div>
         ))}
         {conversations.length === 0 && (
-          <div className="flex flex-col items-center justify-center mt-12 text-zinc-400">
-            <MessageCircle size={24} className="mb-2 opacity-40" />
-            <p className="text-xs">暂无对话</p>
-            <p className="text-[10px] mt-1">点击上方「新对话」开始</p>
+          <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} />
+            <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>

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

@@ -11,21 +11,22 @@ const navItems = [
 
 export function Sidebar() {
   return (
-    <aside className="w-16 flex flex-col items-center py-4 gap-1 border-r border-zinc-200 bg-zinc-50">
+    <aside className="w-16 flex flex-col items-center py-5 gap-1.5 border-r border-zinc-100 bg-white">
       {navItems.map(({ to, icon: Icon, label }) => (
         <NavLink
           key={to}
           to={to}
+          title={label}
           className={({ isActive }) =>
             cn(
-              'w-12 h-12 flex flex-col items-center justify-center gap-0.5 rounded-lg transition-colors text-[10px] font-medium',
+              'w-11 h-11 flex flex-col items-center justify-center gap-0.5 rounded-xl transition-all duration-200 text-[10px] font-medium',
               isActive
-                ? 'bg-indigo-50 text-indigo-600'
-                : 'text-zinc-500 hover:text-zinc-700 hover:bg-zinc-100'
+                ? 'bg-indigo-50 text-indigo-600 shadow-sm shadow-indigo-100'
+                : 'text-zinc-400 hover:text-zinc-600 hover:bg-zinc-50'
             )
           }
         >
-          <Icon size={18} />
+          <Icon size={17} strokeWidth={1.8} />
           <span>{label}</span>
         </NavLink>
       ))}

web/client/src/components/ui/confirm.tsx

@@ -0,0 +1,74 @@
+import { useEffect, useRef } from 'react';
+import { X } from 'lucide-react';
+
+interface ConfirmDialogProps {
+  open: boolean;
+  title: string;
+  description?: string;
+  confirmText?: string;
+  cancelText?: string;
+  variant?: 'danger' | 'default';
+  onConfirm: () => void;
+  onCancel: () => void;
+}
+
+export function ConfirmDialog({
+  open,
+  title,
+  description,
+  confirmText = '确认',
+  cancelText = '取消',
+  variant = 'default',
+  onConfirm,
+  onCancel,
+}: ConfirmDialogProps) {
+  const cancelRef = useRef<HTMLButtonElement>(null);
+
+  useEffect(() => {
+    if (open) cancelRef.current?.focus();
+    const handleKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onCancel();
+    };
+    if (open) document.addEventListener('keydown', handleKey);
+    return () => document.removeEventListener('keydown', handleKey);
+  }, [open, onCancel]);
+
+  if (!open) return null;
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center">
+      {/* Backdrop */}
+      <div className="absolute inset-0 bg-black/20 backdrop-blur-[2px]" onClick={onCancel} />
+      {/* Dialog */}
+      <div className="relative bg-white rounded-2xl shadow-xl shadow-zinc-200/50 border border-zinc-100 p-5 w-[320px] animate-in fade-in zoom-in-95 duration-150">
+        <button
+          onClick={onCancel}
+          className="absolute top-3.5 right-3.5 text-zinc-300 hover:text-zinc-500 transition-colors"
+        >
+          <X size={16} />
+        </button>
+        <h3 className="text-sm font-semibold text-zinc-800 mb-1">{title}</h3>
+        {description && <p className="text-xs text-zinc-400 leading-relaxed mb-4">{description}</p>}
+        <div className="flex items-center justify-end gap-2 mt-4">
+          <button
+            ref={cancelRef}
+            onClick={onCancel}
+            className="px-3.5 py-1.5 text-xs font-medium text-zinc-500 hover:text-zinc-700 rounded-lg hover:bg-zinc-50 transition-colors"
+          >
+            {cancelText}
+          </button>
+          <button
+            onClick={onConfirm}
+            className={`px-3.5 py-1.5 text-xs font-medium rounded-lg transition-colors ${
+              variant === 'danger'
+                ? 'bg-red-500 text-white hover:bg-red-600'
+                : 'bg-indigo-600 text-white hover:bg-indigo-700'
+            }`}
+          >
+            {confirmText}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}

web/client/src/hooks/useConfirm.ts

@@ -0,0 +1,43 @@
+import { useState, useCallback } from 'react';
+
+interface ConfirmOptions {
+  title: string;
+  description?: string;
+  confirmText?: string;
+  cancelText?: string;
+  variant?: 'danger' | 'default';
+}
+
+interface ConfirmState extends ConfirmOptions {
+  open: boolean;
+  resolve: ((value: boolean) => void) | null;
+}
+
+const initialState: ConfirmState = {
+  open: false,
+  title: '',
+  description: '',
+  resolve: null,
+};
+
+export function useConfirm() {
+  const [state, setState] = useState<ConfirmState>(initialState);
+
+  const confirm = useCallback((options: ConfirmOptions): Promise<boolean> => {
+    return new Promise((resolve) => {
+      setState({ ...options, open: true, resolve });
+    });
+  }, []);
+
+  const handleConfirm = useCallback(() => {
+    state.resolve?.(true);
+    setState(initialState);
+  }, [state.resolve]);
+
+  const handleCancel = useCallback(() => {
+    state.resolve?.(false);
+    setState(initialState);
+  }, [state.resolve]);
+
+  return { confirmState: state, confirm, handleConfirm, handleCancel };
+}

web/client/src/index.css

@@ -4,30 +4,37 @@
 
 @layer base {
   * {
-    @apply border-zinc-200;
+    @apply border-zinc-200/60;
   }
   body {
-    @apply bg-white text-zinc-900;
+    @apply bg-white text-zinc-900 antialiased;
   }
-  /* Custom scrollbar */
+  /* Modern scrollbar */
   ::-webkit-scrollbar {
-    width: 6px;
-    height: 6px;
+    width: 5px;
+    height: 5px;
   }
   ::-webkit-scrollbar-track {
     background: transparent;
   }
   ::-webkit-scrollbar-thumb {
-    background: #d4d4d8;
-    border-radius: 3px;
+    background: rgba(161, 161, 170, 0.35);
+    border-radius: 10px;
   }
   ::-webkit-scrollbar-thumb:hover {
-    background: #a1a1aa;
+    background: rgba(161, 161, 170, 0.6);
   }
   /* Firefox scrollbar */
   * {
     scrollbar-width: thin;
-    scrollbar-color: #d4d4d8 transparent;
+    scrollbar-color: rgba(161, 161, 170, 0.35) transparent;
+  }
+}
+
+@layer utilities {
+  /* Skeleton shimmer animation */
+  .skeleton {
+    @apply bg-zinc-100 rounded-md animate-pulse;
   }
 }