chore(deps): 添加项目依赖

- clsx: CSS 类名合并工具
- lucide-react: React 图标库

package.json

@@ -9,6 +9,8 @@
     "lint": "eslint"
   },
   "dependencies": {
+    "clsx": "^2.1.1",
+    "lucide-react": "^0.561.0",
     "next": "16.0.10",
     "react": "19.2.1",
     "react-dom": "19.2.1"

pnpm-lock.yaml

@@ -8,6 +8,12 @@ importers:
 
   .:
     dependencies:
+      clsx:
+        specifier: ^2.1.1
+        version: 2.1.1
+      lucide-react:
+        specifier: ^0.561.0
+        version: 0.561.0(react@19.2.1)
       next:
         specifier: 16.0.10
         version: 16.0.10(@babel/core@7.28.5)(react-dom@19.2.1(react@19.2.1))(react@19.2.1)
@@ -799,6 +805,10 @@ packages:
   client-only@0.0.1:
     resolution: {integrity: sha512-IV3Ou0jSMzZrd3pZ48nLkT9DA7Ag1pnPzaiQhpW7c3RbcqqzvzzVu+L8gfqMp/8IM2MQtSiqaCxrrcfu8I8rMA==}
 
+  clsx@2.1.1:
+    resolution: {integrity: sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==}
+    engines: {node: '>=6'}
+
   color-convert@2.0.1:
     resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
     engines: {node: '>=7.0.0'}
@@ -1450,6 +1460,11 @@ packages:
   lru-cache@5.1.1:
     resolution: {integrity: sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==}
 
+  lucide-react@0.561.0:
+    resolution: {integrity: sha512-Y59gMY38tl4/i0qewcqohPdEbieBy7SovpBL9IFebhc2mDd8x4PZSOsiFRkpPcOq6bj1r/mjH/Rk73gSlIJP2A==}
+    peerDependencies:
+      react: ^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0
+
   magic-string@0.30.21:
     resolution: {integrity: sha512-vd2F4YUyEXKGcLHoq+TEyCjxueSeHnFxyyjNp80yg0XV4vUhnDer/lvvlqM/arB5bXQN5K2/3oinyCRyx8T2CQ==}
 
@@ -2649,6 +2664,8 @@ snapshots:
 
   client-only@0.0.1: {}
 
+  clsx@2.1.1: {}
+
   color-convert@2.0.1:
     dependencies:
       color-name: 1.1.4
@@ -3427,6 +3444,10 @@ snapshots:
     dependencies:
       yallist: 3.1.1
 
+  lucide-react@0.561.0(react@19.2.1):
+    dependencies:
+      react: 19.2.1
+
   magic-string@0.30.21:
     dependencies:
       '@jridgewell/sourcemap-codec': 1.5.5

src/app/chat/[id]/page.tsx

@@ -0,0 +1,151 @@
+'use client';
+
+import { useState, useRef, useEffect } from 'react';
+import { useParams } from 'next/navigation';
+import { Share2, MoreHorizontal } from 'lucide-react';
+import { Sidebar, SidebarToggle } from '@/components/layout/Sidebar';
+import { ChatInput } from '@/components/features/ChatInput';
+import { MessageBubble } from '@/components/features/MessageBubble';
+import { cn } from '@/lib/utils';
+import {
+  models,
+  tools as initialTools,
+  chatHistories,
+  sampleMessages,
+  currentUser
+} from '@/data/mock';
+import type { Model, Tool, Message } from '@/types';
+
+export default function ChatPage() {
+  const params = useParams();
+  const chatId = params.id as string;
+
+  const [sidebarOpen, setSidebarOpen] = useState(true);
+  const [selectedModel, setSelectedModel] = useState<Model>(models[1]);
+  const [tools, setTools] = useState<Tool[]>(initialTools);
+  const [messages, setMessages] = useState<Message[]>(sampleMessages);
+  const messagesEndRef = useRef<HTMLDivElement>(null);
+
+  // 获取当前聊天信息
+  const currentChat = chatHistories.find(c => c.id === chatId);
+  const chatTitle = currentChat?.title || '新对话';
+
+  // 滚动到底部
+  const scrollToBottom = () => {
+    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
+  };
+
+  useEffect(() => {
+    scrollToBottom();
+  }, [messages]);
+
+  const handleToolToggle = (toolId: string) => {
+    setTools((prev) =>
+      prev.map((tool) =>
+        tool.id === toolId ? { ...tool, enabled: !tool.enabled } : tool
+      )
+    );
+  };
+
+  const handleEnableAllTools = (enabled: boolean) => {
+    setTools((prev) =>
+      prev.map((tool) => ({ ...tool, enabled }))
+    );
+  };
+
+  const handleSend = (message: string) => {
+    // 添加用户消息
+    const userMessage: Message = {
+      id: `msg-${Date.now()}`,
+      role: 'user',
+      content: message,
+      timestamp: new Date(),
+    };
+    setMessages((prev) => [...prev, userMessage]);
+
+    // 模拟 AI 回复
+    setTimeout(() => {
+      const aiMessage: Message = {
+        id: `msg-${Date.now() + 1}`,
+        role: 'assistant',
+        content: '感谢您的消息！这是一个模拟的 AI 回复。在实际应用中，这里会调用 AI API 生成真实的回复内容。\n\n您可以继续与我对话，我会尽力帮助您解决问题。',
+        timestamp: new Date(),
+      };
+      setMessages((prev) => [...prev, aiMessage]);
+    }, 1000);
+  };
+
+  return (
+    <div className="flex min-h-screen">
+      {/* 侧边栏 */}
+      <Sidebar
+        user={currentUser}
+        chatHistories={chatHistories}
+        isOpen={sidebarOpen}
+        onToggle={() => setSidebarOpen(!sidebarOpen)}
+      />
+
+      {/* 主内容区 */}
+      <main
+        className={cn(
+          'flex-1 flex flex-col min-h-screen transition-all duration-300',
+          sidebarOpen ? 'ml-[var(--sidebar-width)]' : 'ml-0'
+        )}
+      >
+        {/* 固定顶部 Header */}
+        <header className="h-[var(--header-height)] px-4 flex items-center justify-between border-b border-[var(--color-border)] bg-white sticky top-0 z-10">
+          <div className="flex items-center gap-3">
+            <SidebarToggle onClick={() => setSidebarOpen(!sidebarOpen)} />
+            <h1 className="text-base font-medium text-[var(--color-text-primary)] truncate max-w-[300px]">
+              {chatTitle}
+            </h1>
+          </div>
+          <div className="flex items-center gap-2">
+            <button
+              className="flex items-center gap-2 px-3 py-1.5 text-sm text-[var(--color-text-secondary)] hover:bg-[var(--color-bg-hover)] rounded-lg transition-colors"
+              title="分享对话"
+            >
+              <Share2 size={16} />
+              <span>分享</span>
+            </button>
+            <button
+              className="w-8 h-8 flex items-center justify-center text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-hover)] rounded-lg transition-colors"
+              title="更多选项"
+            >
+              <MoreHorizontal size={18} />
+            </button>
+          </div>
+        </header>
+
+        {/* 消息列表区域 */}
+        <div className="flex-1 overflow-y-auto">
+          <div className="max-w-[900px] mx-auto px-4 py-6">
+            {messages.map((message) => (
+              <MessageBubble
+                key={message.id}
+                message={message}
+                user={message.role === 'user' ? currentUser : undefined}
+              />
+            ))}
+            <div ref={messagesEndRef} />
+          </div>
+        </div>
+
+        {/* 固定底部输入框 */}
+        <div className="sticky bottom-0 bg-gradient-to-t from-white via-white to-transparent pt-4">
+          <div className="max-w-[900px] mx-auto px-4 pb-4">
+            <ChatInput
+              models={models}
+              selectedModel={selectedModel}
+              onModelSelect={setSelectedModel}
+              tools={tools}
+              onToolToggle={handleToolToggle}
+              onEnableAllTools={handleEnableAllTools}
+              onSend={handleSend}
+            />
+          </div>
+        </div>
+      </main>
+    </div>
+  );
+}

src/app/globals.css

@@ -1,26 +1,264 @@
 @import "tailwindcss";
 
+/* ========================================
+   cchcode UI - 设计令牌
+   基于原型图: https://openclaude.me/chat
+   ======================================== */
+
 :root {
-  --background: #ffffff;
+  /* 品牌色 */
-  --foreground: #171717;
+  --color-primary: #E06B3E;
+  --color-primary-hover: #D4643E;
+  --color-primary-light: #FEF3EF;
+  --color-primary-alpha: rgba(224, 107, 62, 0.1);
+
+  /* 背景色 */
+  --color-bg-primary: #FFFFFF;
+  --color-bg-secondary: #FAFAF9;
+  --color-bg-tertiary: #F7F7F8;
+  --color-bg-hover: #F3F4F6;
+
+  /* 文字色 */
+  --color-text-primary: #111827;
+  --color-text-secondary: #6B7280;
+  --color-text-tertiary: #9CA3AF;
+  --color-text-placeholder: #A0AEC0;
+
+  /* 边框色 */
+  --color-border: #E5E5E5;
+  --color-border-light: #F0F0F0;
+  --color-border-focus: #E06B3E;
+
+  /* 消息气泡色 */
+  --color-message-user: #EDE4DE;
+  --color-message-assistant-bg: #F7F7F6;
+  --color-message-assistant-border: #E8E8E8;
+
+  /* 阴影 */
+  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
+  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
+  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
+  --shadow-dropdown: 0 4px 12px rgba(0, 0, 0, 0.1);
+  --shadow-input: 0 2px 8px rgba(0, 0, 0, 0.04);
+  --shadow-input-focus: 0 4px 16px rgba(224, 107, 62, 0.1);
+
+  /* 布局 */
+  --sidebar-width: 260px;
+  --header-height: 56px;
+  --input-max-width: 900px;
+
+  /* 圆角 */
+  --radius-sm: 6px;
+  --radius-md: 8px;
+  --radius-lg: 12px;
+  --radius-xl: 16px;
+  --radius-2xl: 18px;
+  --radius-full: 9999px;
+
+  /* 过渡 */
+  --transition-fast: 0.15s ease;
+  --transition-base: 0.2s ease;
+  --transition-slow: 0.3s ease;
 }
 
 @theme inline {
-  --color-background: var(--background);
+  /* 品牌色 */
-  --color-foreground: var(--foreground);
+  --color-primary: var(--color-primary);
-  --font-sans: var(--font-geist-sans);
+  --color-primary-hover: var(--color-primary-hover);
-  --font-mono: var(--font-geist-mono);
+  --color-primary-light: var(--color-primary-light);
+
+  /* 背景色 */
+  --color-background: var(--color-bg-secondary);
+  --color-foreground: var(--color-text-primary);
+
+  /* 字体 */
+  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+  --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;
 }
 
-@media (prefers-color-scheme: dark) {
+/* ========================================
-  :root {
+   全局样式
-    --background: #0a0a0a;
+   ======================================== */
-    --foreground: #ededed;
+* {
-  }
+  box-sizing: border-box;
+}
+
+html {
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
 }
 
 body {
-  background: var(--background);
+  background-color: var(--color-bg-secondary);
-  color: var(--foreground);
+  color: var(--color-text-primary);
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+  line-height: 1.5;
+  min-height: 100vh;
+}
+
+/* ========================================
+   自定义滚动条
+   ======================================== */
+::-webkit-scrollbar {
+  width: 6px;
+  height: 6px;
+}
+
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+::-webkit-scrollbar-thumb {
+  background-color: var(--color-border);
+  border-radius: var(--radius-full);
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background-color: var(--color-text-tertiary);
+}
+
+/* ========================================
+   动画
+   ======================================== */
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+@keyframes slideUp {
+  from {
+    opacity: 0;
+    transform: translateY(10px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+@keyframes slideDown {
+  from {
+    opacity: 0;
+    transform: translateY(-8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.animate-fade-in {
+  animation: fadeIn var(--transition-base);
+}
+
+.animate-slide-up {
+  animation: slideUp var(--transition-base);
+}
+
+.animate-slide-down {
+  animation: slideDown var(--transition-fast);
+}
+
+/* ========================================
+   响应式设计
+   ======================================== */
+@media (max-width: 768px) {
+  :root {
+    --sidebar-width: 0px;
+  }
+}
+
+@media (min-width: 769px) and (max-width: 1024px) {
+  :root {
+    --sidebar-width: 220px;
+  }
+}
+
+/* ========================================
+   按钮样式
+   ======================================== */
+.btn-primary {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 8px 16px;
+  background-color: var(--color-primary);
+  color: white;
+  font-size: 14px;
+  font-weight: 500;
+  border-radius: var(--radius-md);
+  border: none;
+  cursor: pointer;
+  transition: background-color var(--transition-fast);
+}
+
+.btn-primary:hover {
+  background-color: var(--color-primary-hover);
+}
+
+.btn-ghost {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 8px 16px;
+  background-color: transparent;
+  color: var(--color-text-secondary);
+  font-size: 14px;
+  font-weight: 500;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--color-border);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.btn-ghost:hover {
+  background-color: var(--color-bg-hover);
+  color: var(--color-text-primary);
+}
+
+.btn-danger {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 8px 16px;
+  background-color: #DC2626;
+  color: white;
+  font-size: 14px;
+  font-weight: 500;
+  border-radius: var(--radius-md);
+  border: none;
+  cursor: pointer;
+  transition: background-color var(--transition-fast);
+}
+
+.btn-danger:hover {
+  background-color: #B91C1C;
+}
+
+/* ========================================
+   设置页面选择器
+   ======================================== */
+.settings-select {
+  appearance: none;
+  background-color: var(--color-bg-primary);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  padding: 8px 32px 8px 12px;
+  font-size: 14px;
+  color: var(--color-text-primary);
+  cursor: pointer;
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: right 8px center;
+  min-width: 140px;
+}
+
+.settings-select:focus {
+  outline: none;
+  border-color: var(--color-primary);
+  box-shadow: var(--shadow-input-focus);
 }

src/app/layout.tsx

@@ -1,20 +1,12 @@
 import type { Metadata } from "next";
-import { Geist, Geist_Mono } from "next/font/google";
 import "./globals.css";
 
-const geistSans = Geist({
-  variable: "--font-geist-sans",
-  subsets: ["latin"],
-});
-
-const geistMono = Geist_Mono({
-  variable: "--font-geist-mono",
-  subsets: ["latin"],
-});
-
 export const metadata: Metadata = {
-  title: "Create Next App",
+  title: "cchcode - AI 智能助手",
-  description: "Generated by create next app",
+  description: "基于 Claude 的智能对话助手",
+  icons: {
+    icon: "/favicon.ico",
+  },
 };
 
 export default function RootLayout({
@@ -23,10 +15,8 @@ export default function RootLayout({
   children: React.ReactNode;
 }>) {
   return (
-    <html lang="en">
+    <html lang="zh-CN">
-      <body
+      <body className="antialiased">
-        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
-      >
         {children}
       </body>
     </html>

src/app/page.tsx

@@ -1,65 +1,70 @@
-import Image from "next/image";
+'use client';
+
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import { AppLayout } from '@/components/layout/AppLayout';
+import { Welcome } from '@/components/features/Welcome';
+import { ChatInput } from '@/components/features/ChatInput';
+import { QuickActions } from '@/components/features/QuickActions';
+import { models, tools as initialTools, quickActions, currentUser, getGreeting } from '@/data/mock';
+import type { Model, Tool, QuickAction } from '@/types';
+
+export default function HomePage() {
+  const router = useRouter();
+  const [selectedModel, setSelectedModel] = useState<Model>(models[1]); // Sonnet as default
+  const [tools, setTools] = useState<Tool[]>(initialTools);
+
+  const greeting = getGreeting(currentUser.name);
+
+  const handleToolToggle = (toolId: string) => {
+    setTools((prev) =>
+      prev.map((tool) =>
+        tool.id === toolId ? { ...tool, enabled: !tool.enabled } : tool
+      )
+    );
+  };
+
+  const handleEnableAllTools = (enabled: boolean) => {
+    setTools((prev) =>
+      prev.map((tool) => ({ ...tool, enabled }))
+    );
+  };
+
+  const handleSend = (message: string) => {
+    // 在实际应用中，这里会创建新对话并跳转
+    console.log('Sending message:', message);
+    router.push('/chat/1');
+  };
+
+  const handleQuickAction = (action: QuickAction) => {
+    if (action.prompt) {
+      handleSend(action.prompt);
+    }
+  };
 
-export default function Home() {
   return (
-    <div className="flex min-h-screen items-center justify-center bg-zinc-50 font-sans dark:bg-black">
+    <AppLayout>
-      <main className="flex min-h-screen w-full max-w-3xl flex-col items-center justify-between py-32 px-16 bg-white dark:bg-black sm:items-start">
+      <div className="w-full max-w-[900px] mx-auto">
-        <Image
+        {/* 欢迎区域 */}
-          className="dark:invert"
+        <Welcome greeting={greeting} className="mb-8" />
-          src="/next.svg"
+
-          alt="Next.js logo"
+        {/* 聊天输入框 */}
-          width={100}
+        <ChatInput
-          height={20}
+          models={models}
-          priority
+          selectedModel={selectedModel}
+          onModelSelect={setSelectedModel}
+          tools={tools}
+          onToolToggle={handleToolToggle}
+          onEnableAllTools={handleEnableAllTools}
+          onSend={handleSend}
         />
-        <div className="flex flex-col items-center gap-6 text-center sm:items-start sm:text-left">
+
-          <h1 className="max-w-xs text-3xl font-semibold leading-10 tracking-tight text-black dark:text-zinc-50">
+        {/* 快捷操作 */}
-            To get started, edit the page.tsx file.
+        <QuickActions
-          </h1>
+          actions={quickActions}
-          <p className="max-w-md text-lg leading-8 text-zinc-600 dark:text-zinc-400">
+          onSelect={handleQuickAction}
-            Looking for a starting point or more instructions? Head over to{" "}
-            <a
-              href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-              className="font-medium text-zinc-950 dark:text-zinc-50"
-            >
-              Templates
-            </a>{" "}
-            or the{" "}
-            <a
-              href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-              className="font-medium text-zinc-950 dark:text-zinc-50"
-            >
-              Learning
-            </a>{" "}
-            center.
-          </p>
-        </div>
-        <div className="flex flex-col gap-4 text-base font-medium sm:flex-row">
-          <a
-            className="flex h-12 w-full items-center justify-center gap-2 rounded-full bg-foreground px-5 text-background transition-colors hover:bg-[#383838] dark:hover:bg-[#ccc] md:w-[158px]"
-            href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            <Image
-              className="dark:invert"
-              src="/vercel.svg"
-              alt="Vercel logomark"
-              width={16}
-              height={16}
         />
-            Deploy Now
-          </a>
-          <a
-            className="flex h-12 w-full items-center justify-center rounded-full border border-solid border-black/[.08] px-5 transition-colors hover:border-transparent hover:bg-black/[.04] dark:border-white/[.145] dark:hover:bg-[#1a1a1a] md:w-[158px]"
-            href="https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            Documentation
-          </a>
-        </div>
-      </main>
       </div>
+    </AppLayout>
   );
 }

src/app/settings/page.tsx

@@ -0,0 +1,317 @@
+'use client';
+
+import { useState } from 'react';
+import Link from 'next/link';
+import { ArrowLeft, Zap, Download } from 'lucide-react';
+import { Sidebar, SidebarToggle } from '@/components/layout/Sidebar';
+import { Toggle } from '@/components/ui/Toggle';
+import { cn } from '@/lib/utils';
+import { currentUser, chatHistories, models } from '@/data/mock';
+import type { Settings } from '@/types';
+
+export default function SettingsPage() {
+  const [sidebarOpen, setSidebarOpen] = useState(true);
+  const [settings, setSettings] = useState<Settings>({
+    defaultModel: 'sonnet',
+    theme: 'light',
+    language: 'zh-CN',
+    enableWebSearch: true,
+    enableCodeExecution: false,
+    saveChatHistory: true,
+  });
+
+  const handleToggle = (key: keyof Settings) => {
+    setSettings((prev) => ({
+      ...prev,
+      [key]: !prev[key],
+    }));
+  };
+
+  const handleSelectChange = (key: keyof Settings, value: string) => {
+    setSettings((prev) => ({
+      ...prev,
+      [key]: value,
+    }));
+  };
+
+  return (
+    <div className="flex min-h-screen">
+      {/* 侧边栏 */}
+      <Sidebar
+        user={currentUser}
+        chatHistories={chatHistories}
+        isOpen={sidebarOpen}
+        onToggle={() => setSidebarOpen(!sidebarOpen)}
+      />
+
+      {/* 主内容区 */}
+      <main
+        className={cn(
+          'flex-1 min-h-screen transition-all duration-300',
+          sidebarOpen ? 'ml-[var(--sidebar-width)]' : 'ml-0'
+        )}
+      >
+        {/* Header */}
+        <header className="h-[var(--header-height)] px-4 flex items-center">
+          <SidebarToggle onClick={() => setSidebarOpen(!sidebarOpen)} />
+        </header>
+
+        {/* Body */}
+        <div className="px-8 pb-8">
+          <div className="max-w-[640px] mx-auto">
+            {/* 返回链接 */}
+            <Link
+              href="/"
+              className="inline-flex items-center gap-2 text-[var(--color-text-secondary)] text-sm mb-4 hover:text-[var(--color-text-primary)] transition-colors"
+            >
+              <ArrowLeft size={16} />
+              <span>返回聊天</span>
+            </Link>
+
+            {/* 页面标题 */}
+            <div className="mb-8">
+              <h1 className="text-2xl font-semibold text-[var(--color-text-primary)] mb-2">
+                设置
+              </h1>
+              <p className="text-sm text-[var(--color-text-secondary)]">
+                管理您的账户设置和偏好
+              </p>
+            </div>
+
+            {/* 账户设置 */}
+            <SettingsSection
+              title="账户"
+              description="管理您的账户信息"
+            >
+              <SettingsItem
+                label="邮箱"
+                description={currentUser.email}
+              >
+                <button className="btn-ghost">更改</button>
+              </SettingsItem>
+
+              <SettingsItem
+                label="当前计划"
+                description={
+                  <span className="inline-flex items-center gap-2 px-4 py-2 bg-[var(--color-primary-light)] rounded-full text-sm text-[var(--color-primary)] font-medium">
+                    <Zap size={14} />
+                    {currentUser.plan === 'free' ? '免费计划' : '专业计划'}
+                  </span>
+                }
+              >
+                <button className="btn-primary">升级</button>
+              </SettingsItem>
+
+              <SettingsItem
+                label="使用量"
+                description="本月消息数"
+              >
+                <div className="w-full">
+                  <div className="mt-3">
+                    <div className="h-2 bg-[var(--color-bg-tertiary)] rounded-full overflow-hidden">
+                      <div
+                        className="h-full bg-[var(--color-primary)] rounded-full transition-all duration-500"
+                        style={{ width: '35%' }}
+                      />
+                    </div>
+                    <div className="flex justify-between mt-2 text-xs text-[var(--color-text-tertiary)]">
+                      <span>35 / 100 条消息</span>
+                      <span>35%</span>
+                    </div>
+                  </div>
+                </div>
+              </SettingsItem>
+            </SettingsSection>
+
+            {/* 偏好设置 */}
+            <SettingsSection
+              title="偏好设置"
+              description="自定义您的体验"
+            >
+              <SettingsItem
+                label="默认模型"
+                description="为新对话选择默认 AI 模型"
+              >
+                <select
+                  className="settings-select"
+                  value={settings.defaultModel}
+                  onChange={(e) => handleSelectChange('defaultModel', e.target.value)}
+                >
+                  {models.map((model) => (
+                    <option key={model.id} value={model.id}>
+                      {model.name}
+                    </option>
+                  ))}
+                </select>
+              </SettingsItem>
+
+              <SettingsItem
+                label="主题"
+                description="选择您喜欢的主题"
+              >
+                <select
+                  className="settings-select"
+                  value={settings.theme}
+                  onChange={(e) => handleSelectChange('theme', e.target.value)}
+                >
+                  <option value="system">跟随系统</option>
+                  <option value="light">浅色</option>
+                  <option value="dark">深色</option>
+                </select>
+              </SettingsItem>
+
+              <SettingsItem
+                label="语言"
+                description="选择您的首选语言"
+              >
+                <select
+                  className="settings-select"
+                  value={settings.language}
+                  onChange={(e) => handleSelectChange('language', e.target.value)}
+                >
+                  <option value="en">English</option>
+                  <option value="zh-CN">简体中文</option>
+                  <option value="zh-TW">繁體中文</option>
+                  <option value="ja">日本語</option>
+                </select>
+              </SettingsItem>
+
+              <SettingsItem
+                label="启用网络搜索"
+                description="允许 AI 搜索网络获取信息"
+              >
+                <Toggle
+                  checked={settings.enableWebSearch}
+                  onChange={() => handleToggle('enableWebSearch')}
+                />
+              </SettingsItem>
+
+              <SettingsItem
+                label="启用代码执行"
+                description="允许 AI 运行代码片段"
+              >
+                <Toggle
+                  checked={settings.enableCodeExecution}
+                  onChange={() => handleToggle('enableCodeExecution')}
+                />
+              </SettingsItem>
+            </SettingsSection>
+
+            {/* 数据与隐私 */}
+            <SettingsSection
+              title="数据与隐私"
+              description="管理您的数据和隐私设置"
+            >
+              <SettingsItem
+                label="聊天历史"
+                description="保存您的对话记录"
+              >
+                <Toggle
+                  checked={settings.saveChatHistory}
+                  onChange={() => handleToggle('saveChatHistory')}
+                />
+              </SettingsItem>
+
+              <SettingsItem
+                label="导出数据"
+                description="下载所有聊天历史"
+              >
+                <button className="btn-ghost inline-flex items-center gap-2">
+                  <Download size={16} />
+                  导出
+                </button>
+              </SettingsItem>
+
+              <SettingsItem
+                label="清除所有聊天"
+                description="删除所有对话历史"
+              >
+                <button className="btn-ghost text-red-600 hover:text-red-700">
+                  清除
+                </button>
+              </SettingsItem>
+            </SettingsSection>
+
+            {/* 危险区域 */}
+            <SettingsSection
+              title="危险区域"
+              description="不可逆操作"
+              variant="danger"
+            >
+              <SettingsItem
+                label="删除账户"
+                description="永久删除您的账户和所有数据"
+              >
+                <button className="btn-danger">删除账户</button>
+              </SettingsItem>
+            </SettingsSection>
+          </div>
+        </div>
+      </main>
+    </div>
+  );
+}
+
+// 设置区域组件
+interface SettingsSectionProps {
+  title: string;
+  description: string;
+  children: React.ReactNode;
+  variant?: 'default' | 'danger';
+}
+
+function SettingsSection({ title, description, children, variant = 'default' }: SettingsSectionProps) {
+  return (
+    <section
+      className={cn(
+        'bg-white border rounded-xl mb-6 overflow-hidden',
+        variant === 'danger' ? 'border-red-200' : 'border-[var(--color-border)]'
+      )}
+    >
+      <div
+        className={cn(
+          'px-5 py-4 border-b',
+          variant === 'danger'
+            ? 'bg-red-50 border-red-200'
+            : 'border-[var(--color-border-light)]'
+        )}
+      >
+        <h2
+          className={cn(
+            'text-base font-semibold',
+            variant === 'danger' ? 'text-red-600' : 'text-[var(--color-text-primary)]'
+          )}
+        >
+          {title}
+        </h2>
+        <p className="text-sm text-[var(--color-text-secondary)] mt-1">
+          {description}
+        </p>
+      </div>
+      <div>{children}</div>
+    </section>
+  );
+}
+
+// 设置项组件
+interface SettingsItemProps {
+  label: string;
+  description: React.ReactNode;
+  children: React.ReactNode;
+}
+
+function SettingsItem({ label, description, children }: SettingsItemProps) {
+  return (
+    <div className="flex justify-between items-center px-5 py-4 border-b border-[var(--color-border-light)] last:border-b-0 hover:bg-[var(--color-bg-tertiary)] transition-colors">
+      <div className="flex-1">
+        <div className="text-sm font-medium text-[var(--color-text-primary)] mb-1">
+          {label}
+        </div>
+        <div className="text-xs text-[var(--color-text-tertiary)]">
+          {description}
+        </div>
+      </div>
+      <div className="ml-4">{children}</div>
+    </div>
+  );
+}

src/components/features/ChatInput.tsx

@@ -0,0 +1,126 @@
+'use client';
+
+import { useState } from 'react';
+import { Plus, Clock, ArrowUp } from 'lucide-react';
+import { ModelSelector } from './ModelSelector';
+import { ToolsDropdown } from './ToolsDropdown';
+import { cn } from '@/lib/utils';
+import type { Model, Tool } from '@/types';
+
+interface ChatInputProps {
+  models: Model[];
+  selectedModel: Model;
+  onModelSelect: (model: Model) => void;
+  tools: Tool[];
+  onToolToggle: (toolId: string) => void;
+  onEnableAllTools: (enabled: boolean) => void;
+  onSend: (message: string) => void;
+  placeholder?: string;
+  className?: string;
+}
+
+export function ChatInput({
+  models,
+  selectedModel,
+  onModelSelect,
+  tools,
+  onToolToggle,
+  onEnableAllTools,
+  onSend,
+  placeholder = 'How can I help you today?',
+  className,
+}: ChatInputProps) {
+  const [message, setMessage] = useState('');
+
+  const handleSend = () => {
+    if (message.trim()) {
+      onSend(message);
+      setMessage('');
+    }
+  };
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      handleSend();
+    }
+  };
+
+  return (
+    <div className={cn('w-full max-w-[var(--input-max-width)] mx-auto', className)}>
+      <div
+        className={cn(
+          'flex flex-col bg-white border border-[var(--color-border)] rounded-[18px] p-4 shadow-[var(--shadow-input)]',
+          'transition-all duration-150',
+          'focus-within:border-[var(--color-border-focus)] focus-within:shadow-[var(--shadow-input-focus)]'
+        )}
+      >
+        {/* 第一行：输入区域 */}
+        <div className="w-full mb-3">
+          <input
+            type="text"
+            value={message}
+            onChange={(e) => setMessage(e.target.value)}
+            onKeyDown={handleKeyDown}
+            placeholder={placeholder}
+            className="w-full border-none outline-none text-base text-[var(--color-text-primary)] bg-transparent py-2 placeholder:text-[var(--color-text-placeholder)]"
+          />
+        </div>
+
+        {/* 第二行：功能按钮区域 */}
+        <div className="flex items-center justify-between w-full">
+          {/* 左侧按钮 */}
+          <div className="flex items-center gap-1">
+            {/* 添加附件 */}
+            <button
+              className="w-8 h-8 flex items-center justify-center rounded-lg text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-hover)] hover:text-[var(--color-text-secondary)] transition-colors"
+              title="Add attachment"
+            >
+              <Plus size={20} />
+            </button>
+
+            {/* 工具下拉 */}
+            <ToolsDropdown
+              tools={tools}
+              onToolToggle={onToolToggle}
+              onEnableAllToggle={onEnableAllTools}
+            />
+
+            {/* 历史记录 */}
+            <button
+              className="w-8 h-8 flex items-center justify-center rounded-lg text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-hover)] hover:text-[var(--color-text-secondary)] transition-colors"
+              title="History"
+            >
+              <Clock size={20} />
+            </button>
+          </div>
+
+          {/* 右侧按钮 */}
+          <div className="flex items-center gap-3">
+            {/* 模型选择器 */}
+            <ModelSelector
+              models={models}
+              selectedModel={selectedModel}
+              onSelect={onModelSelect}
+            />
+
+            {/* 发送按钮 */}
+            <button
+              onClick={handleSend}
+              disabled={!message.trim()}
+              className={cn(
+                'w-[38px] h-[38px] flex items-center justify-center bg-[var(--color-primary)] text-white rounded-xl transition-all duration-150',
+                message.trim()
+                  ? 'hover:bg-[var(--color-primary-hover)] hover:-translate-y-0.5'
+                  : 'opacity-50 cursor-not-allowed'
+              )}
+              title="Send message"
+            >
+              <ArrowUp size={18} />
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/features/MessageBubble.tsx

@@ -0,0 +1,140 @@
+'use client';
+
+import { Copy, ThumbsUp, ThumbsDown, RefreshCw } from 'lucide-react';
+import { Avatar } from '@/components/ui/Avatar';
+import { AILogo } from '@/components/ui/AILogo';
+import { cn } from '@/lib/utils';
+import type { Message, User } from '@/types';
+
+interface MessageBubbleProps {
+  message: Message;
+  user?: User;
+}
+
+export function MessageBubble({ message, user }: MessageBubbleProps) {
+  const isUser = message.role === 'user';
+
+  // 简单的 Markdown 渲染
+  const renderContent = (content: string) => {
+    // 处理代码块
+    const parts = content.split(/(`[^`]+`)/g);
+    return parts.map((part, index) => {
+      if (part.startsWith('`') && part.endsWith('`')) {
+        return (
+          <code
+            key={index}
+            className="bg-red-50 text-red-700 px-1.5 py-0.5 rounded text-sm font-mono"
+          >
+            {part.slice(1, -1)}
+          </code>
+        );
+      }
+      // 处理粗体
+      const boldParts = part.split(/(\*\*[^*]+\*\*)/g);
+      return boldParts.map((boldPart, boldIndex) => {
+        if (boldPart.startsWith('**') && boldPart.endsWith('**')) {
+          return (
+            <strong key={`${index}-${boldIndex}`} className="font-semibold">
+              {boldPart.slice(2, -2)}
+            </strong>
+          );
+        }
+        return <span key={`${index}-${boldIndex}`}>{boldPart}</span>;
+      });
+    });
+  };
+
+  if (isUser) {
+    return (
+      <div className="flex justify-end items-start gap-3 mb-8 animate-fade-in">
+        <div className="max-w-[70%]">
+          <div className="bg-[var(--color-message-user)] text-[var(--color-text-primary)] px-4 py-3 rounded-[18px] text-base leading-relaxed">
+            {message.content}
+          </div>
+        </div>
+        {user && <Avatar name={user.name} size="md" />}
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex items-start gap-4 mb-8 animate-fade-in">
+      {/* AI 图标 */}
+      <div className="flex-shrink-0 mt-4">
+        <AILogo size={28} />
+      </div>
+
+      {/* 消息内容 */}
+      <div className="flex-1 max-w-full">
+        <div className="bg-[var(--color-message-assistant-bg)] border border-[var(--color-message-assistant-border)] rounded-2xl px-6 py-5 shadow-sm">
+          <div className="text-base text-[var(--color-text-primary)] leading-[1.8] whitespace-pre-wrap">
+            {message.content.split('\n\n').map((paragraph, index) => {
+              // 处理列表
+              if (paragraph.startsWith('- ') || paragraph.startsWith('* ')) {
+                const items = paragraph.split('\n');
+                return (
+                  <ul key={index} className="list-disc pl-5 my-3 space-y-2">
+                    {items.map((item, i) => (
+                      <li key={i} className="leading-relaxed">
+                        {renderContent(item.replace(/^[-*]\s/, ''))}
+                      </li>
+                    ))}
+                  </ul>
+                );
+              }
+              // 处理有序列表
+              if (/^\d+\.\s/.test(paragraph)) {
+                const items = paragraph.split('\n');
+                return (
+                  <ol key={index} className="list-decimal pl-5 my-3 space-y-2">
+                    {items.map((item, i) => (
+                      <li key={i} className="leading-relaxed marker:text-[var(--color-primary)] marker:font-medium">
+                        {renderContent(item.replace(/^\d+\.\s/, ''))}
+                      </li>
+                    ))}
+                  </ol>
+                );
+              }
+              return (
+                <p key={index} className="mb-4 last:mb-0">
+                  {renderContent(paragraph)}
+                </p>
+              );
+            })}
+          </div>
+
+          {/* 操作按钮 */}
+          <div className="flex items-center gap-1 mt-4 pt-3">
+            <ActionButton icon={Copy} title="Copy" />
+            <ActionButton icon={ThumbsUp} title="Good response" />
+            <ActionButton icon={ThumbsDown} title="Bad response" />
+            <ActionButton icon={RefreshCw} title="Regenerate" />
+          </div>
+
+          {/* 免责声明 */}
+          <div className="text-xs text-[var(--color-text-tertiary)] text-right mt-2">
+            cchcode can make mistakes
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+interface ActionButtonProps {
+  icon: React.ComponentType<{ size?: number }>;
+  title: string;
+  onClick?: () => void;
+}
+
+function ActionButton({ icon: Icon, title, onClick }: ActionButtonProps) {
+  return (
+    <button
+      onClick={onClick}
+      className="w-8 h-8 flex items-center justify-center rounded-lg text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-hover)] hover:text-[var(--color-text-secondary)] transition-colors"
+      title={title}
+    >
+      <Icon size={16} />
+    </button>
+  );
+}

src/components/features/ModelSelector.tsx

@@ -0,0 +1,80 @@
+'use client';
+
+import { useState, useRef, useEffect } from 'react';
+import { ChevronDown } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import type { Model } from '@/types';
+
+interface ModelSelectorProps {
+  models: Model[];
+  selectedModel: Model;
+  onSelect: (model: Model) => void;
+}
+
+export function ModelSelector({ models, selectedModel, onSelect }: ModelSelectorProps) {
+  const [isOpen, setIsOpen] = useState(false);
+  const dropdownRef = useRef<HTMLDivElement>(null);
+
+  // 点击外部关闭
+  useEffect(() => {
+    function handleClickOutside(event: MouseEvent) {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
+        setIsOpen(false);
+      }
+    }
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  return (
+    <div className={cn('relative', isOpen && 'model-selector--open')} ref={dropdownRef}>
+      {/* 触发按钮 */}
+      <button
+        onClick={() => setIsOpen(!isOpen)}
+        className="flex items-center gap-1 px-2 py-1 text-sm font-medium text-[var(--color-text-secondary)] rounded-lg hover:bg-[var(--color-bg-hover)] transition-colors"
+      >
+        <span>{selectedModel.name}</span>
+        <ChevronDown
+          size={16}
+          className={cn('transition-transform duration-150', isOpen && 'rotate-180')}
+        />
+      </button>
+
+      {/* 下拉菜单 */}
+      <div
+        className={cn(
+          'absolute bottom-full right-0 mb-2 min-w-[160px] bg-white border border-[var(--color-border)] rounded-xl shadow-lg p-1 z-50',
+          'transition-all duration-150',
+          isOpen
+            ? 'opacity-100 visible translate-y-0'
+            : 'opacity-0 invisible translate-y-2'
+        )}
+      >
+        {models.map((model) => {
+          const isSelected = model.id === selectedModel.id;
+          return (
+            <button
+              key={model.id}
+              onClick={() => {
+                onSelect(model);
+                setIsOpen(false);
+              }}
+              className="flex items-center justify-between w-full px-3 py-2 rounded-lg hover:bg-[var(--color-bg-hover)] transition-colors"
+            >
+              <span
+                className={cn(
+                  'font-medium text-sm',
+                  isSelected ? 'text-[var(--color-primary)]' : 'text-[var(--color-text-primary)]'
+                )}
+              >
+                {model.name}
+              </span>
+              <span className="text-xs text-[var(--color-text-tertiary)]">{model.tag}</span>
+            </button>
+          );
+        })}
+      </div>
+    </div>
+  );
+}

src/components/features/QuickActions.tsx

@@ -0,0 +1,45 @@
+'use client';
+
+import { Code, PenTool, GraduationCap, Home, Sparkles } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import type { QuickAction } from '@/types';
+
+const iconMap: Record<string, React.ComponentType<{ size?: number; className?: string }>> = {
+  Code,
+  PenTool,
+  GraduationCap,
+  Home,
+  Sparkles,
+};
+
+interface QuickActionsProps {
+  actions: QuickAction[];
+  onSelect: (action: QuickAction) => void;
+  className?: string;
+}
+
+export function QuickActions({ actions, onSelect, className }: QuickActionsProps) {
+  return (
+    <div className={cn('flex flex-wrap justify-center gap-3 mt-6', className)}>
+      {actions.map((action) => {
+        const Icon = iconMap[action.icon];
+        return (
+          <button
+            key={action.id}
+            onClick={() => onSelect(action)}
+            className={cn(
+              'flex items-center gap-2 px-4 py-2',
+              'bg-white border border-[var(--color-border)] rounded-full',
+              'text-sm text-[var(--color-text-secondary)]',
+              'hover:bg-[var(--color-bg-tertiary)] hover:text-[var(--color-text-primary)]',
+              'transition-all duration-150'
+            )}
+          >
+            {Icon && <Icon size={16} className="quick-action__icon" />}
+            <span>{action.label}</span>
+          </button>
+        );
+      })}
+    </div>
+  );
+}

src/components/features/ToolsDropdown.tsx

@@ -0,0 +1,105 @@
+'use client';
+
+import { useState, useRef, useEffect } from 'react';
+import { Wrench, Search, Terminal, Globe, Check } from 'lucide-react';
+import { Toggle } from '@/components/ui/Toggle';
+import { cn } from '@/lib/utils';
+import type { Tool } from '@/types';
+
+const iconMap: Record<string, React.ComponentType<{ size?: number; className?: string }>> = {
+  Search,
+  Terminal,
+  Globe,
+};
+
+interface ToolsDropdownProps {
+  tools: Tool[];
+  onToolToggle: (toolId: string) => void;
+  onEnableAllToggle: (enabled: boolean) => void;
+}
+
+export function ToolsDropdown({ tools, onToolToggle, onEnableAllToggle }: ToolsDropdownProps) {
+  const [isOpen, setIsOpen] = useState(false);
+  const dropdownRef = useRef<HTMLDivElement>(null);
+
+  const enabledCount = tools.filter((t) => t.enabled).length;
+  const allEnabled = enabledCount > 0;
+
+  // 点击外部关闭
+  useEffect(() => {
+    function handleClickOutside(event: MouseEvent) {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
+        setIsOpen(false);
+      }
+    }
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  return (
+    <div className="relative" ref={dropdownRef}>
+      {/* 触发按钮 */}
+      <div className="relative">
+        <button
+          onClick={() => setIsOpen(!isOpen)}
+          className={cn(
+            'w-8 h-8 flex items-center justify-center rounded-lg transition-colors',
+            enabledCount > 0
+              ? 'text-[var(--color-primary)] bg-[var(--color-primary-light)]'
+              : 'text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-hover)] hover:text-[var(--color-text-secondary)]'
+          )}
+          title="Tools"
+        >
+          <Wrench size={20} />
+        </button>
+        {enabledCount > 0 && (
+          <span className="absolute -top-0.5 -right-0.5 min-w-4 h-4 bg-[var(--color-primary)] text-white text-[10px] font-semibold rounded-full flex items-center justify-center px-1">
+            {enabledCount}
+          </span>
+        )}
+      </div>
+
+      {/* 下拉菜单 */}
+      <div
+        className={cn(
+          'absolute bottom-full left-0 mb-2 min-w-[220px] bg-white border border-[var(--color-border)] rounded-xl shadow-lg p-2 z-50',
+          'transition-all duration-150',
+          isOpen
+            ? 'opacity-100 visible translate-y-0'
+            : 'opacity-0 invisible translate-y-2'
+        )}
+      >
+        {/* Header */}
+        <div className="flex items-center justify-between px-3 py-2 border-b border-[var(--color-border-light)] mb-2">
+          <span className="text-sm font-medium text-[var(--color-text-primary)]">Enable Tools</span>
+          <Toggle checked={allEnabled} onChange={onEnableAllToggle} />
+        </div>
+
+        {/* 工具列表 */}
+        {tools.map((tool) => {
+          const Icon = iconMap[tool.icon];
+          return (
+            <button
+              key={tool.id}
+              onClick={() => onToolToggle(tool.id)}
+              className="flex items-center gap-3 w-full px-3 py-2 rounded-lg hover:bg-[var(--color-bg-hover)] transition-colors"
+            >
+              {Icon && <Icon size={20} className="text-[var(--color-text-tertiary)]" />}
+              <span className="flex-1 text-sm text-[var(--color-text-primary)] text-left">
+                {tool.name}
+              </span>
+              <Check
+                size={16}
+                className={cn(
+                  'text-[var(--color-primary)] transition-opacity',
+                  tool.enabled ? 'opacity-100' : 'opacity-0'
+                )}
+              />
+            </button>
+          );
+        })}
+      </div>
+    </div>
+  );
+}

src/components/features/Welcome.tsx

@@ -0,0 +1,25 @@
+'use client';
+
+import { AILogo } from '@/components/ui/AILogo';
+import { cn } from '@/lib/utils';
+
+interface WelcomeProps {
+  greeting: string;
+  className?: string;
+}
+
+export function Welcome({ greeting, className }: WelcomeProps) {
+  return (
+    <div className={cn('text-center animate-fade-in', className)}>
+      {/* 装饰图标 */}
+      <div className="flex justify-center mb-6">
+        <AILogo size={48} />
+      </div>
+
+      {/* 问候语 */}
+      <h1 className="text-4xl font-normal text-[var(--color-text-primary)]">
+        {greeting}
+      </h1>
+    </div>
+  );
+}

src/components/layout/AppLayout.tsx

@@ -0,0 +1,49 @@
+'use client';
+
+import { useState, type ReactNode } from 'react';
+import { Sidebar, SidebarToggle } from '@/components/layout/Sidebar';
+import { currentUser, chatHistories } from '@/data/mock';
+import { cn } from '@/lib/utils';
+
+interface AppLayoutProps {
+  children: ReactNode;
+  showHeader?: boolean;
+  headerContent?: ReactNode;
+}
+
+export function AppLayout({ children, showHeader = true, headerContent }: AppLayoutProps) {
+  const [sidebarOpen, setSidebarOpen] = useState(true);
+
+  return (
+    <div className="flex min-h-screen">
+      {/* 侧边栏 */}
+      <Sidebar
+        user={currentUser}
+        chatHistories={chatHistories}
+        isOpen={sidebarOpen}
+        onToggle={() => setSidebarOpen(!sidebarOpen)}
+      />
+
+      {/* 主内容区 */}
+      <main
+        className={cn(
+          'flex-1 flex flex-col min-h-screen transition-all duration-300',
+          sidebarOpen ? 'ml-[var(--sidebar-width)]' : 'ml-0'
+        )}
+      >
+        {/* Header */}
+        {showHeader && (
+          <header className="h-[var(--header-height)] px-4 flex items-center justify-start">
+            <SidebarToggle onClick={() => setSidebarOpen(!sidebarOpen)} />
+            {headerContent}
+          </header>
+        )}
+
+        {/* Body */}
+        <div className="flex-1 flex flex-col justify-center items-center p-4">
+          {children}
+        </div>
+      </main>
+    </div>
+  );
+}

src/components/layout/Sidebar.tsx

@@ -0,0 +1,107 @@
+'use client';
+
+import Link from 'next/link';
+import { usePathname } from 'next/navigation';
+import { Plus, ChevronDown, PanelLeft } from 'lucide-react';
+import { Avatar } from '@/components/ui/Avatar';
+import { cn } from '@/lib/utils';
+import type { ChatHistory, User } from '@/types';
+
+interface SidebarProps {
+  user: User;
+  chatHistories: ChatHistory[];
+  isOpen?: boolean;
+  onToggle?: () => void;
+}
+
+export function Sidebar({ user, chatHistories, isOpen = true }: SidebarProps) {
+  const pathname = usePathname();
+
+  return (
+    <>
+      {/* 侧边栏 */}
+      <aside
+        className={cn(
+          'fixed top-0 left-0 bottom-0 z-50 bg-white border-r border-[var(--color-border-light)] flex flex-col transition-all duration-300 ease-in-out overflow-hidden',
+          isOpen ? 'w-[var(--sidebar-width)]' : 'w-0 border-r-0'
+        )}
+      >
+        {/* 品牌 Header */}
+        <header className="p-4">
+          <h1 className="text-lg font-bold text-[var(--color-text-primary)]">cchcode</h1>
+        </header>
+
+        {/* 新建对话按钮 */}
+        <div className="px-4 py-2">
+          <Link
+            href="/"
+            className="flex items-center gap-2 text-[var(--color-primary)] text-sm font-medium py-2 hover:opacity-80 transition-opacity"
+          >
+            <Plus size={18} />
+            <span>New chat</span>
+          </Link>
+        </div>
+
+        {/* Recents 标签 */}
+        <div className="px-4 py-2">
+          <h2 className="text-xs font-medium text-[var(--color-text-tertiary)] uppercase tracking-wider mb-2">
+            Recents
+          </h2>
+        </div>
+
+        {/* 聊天列表 */}
+        <nav className="flex-1 overflow-y-auto px-2 flex flex-col gap-1">
+          {chatHistories.map((chat) => {
+            const isActive = pathname === `/chat/${chat.id}`;
+            return (
+              <Link
+                key={chat.id}
+                href={`/chat/${chat.id}`}
+                className={cn(
+                  'block px-3 py-2 rounded-lg text-sm cursor-pointer transition-colors truncate',
+                  isActive
+                    ? 'bg-[var(--color-bg-tertiary)] text-[var(--color-text-primary)]'
+                    : 'text-[var(--color-text-secondary)] hover:bg-[var(--color-bg-hover)]'
+                )}
+              >
+                {chat.title}
+              </Link>
+            );
+          })}
+        </nav>
+
+        {/* 用户信息 Footer */}
+        <footer className="p-4 border-t border-[var(--color-border-light)] mt-auto">
+          <div className="flex items-center gap-3 p-2 rounded-lg cursor-pointer hover:bg-[var(--color-bg-hover)] transition-colors">
+            <Avatar name={user.name} size="md" />
+            <div className="flex-1 min-w-0">
+              <div className="text-sm text-[var(--color-text-primary)] truncate">{user.email}</div>
+              <div className="text-xs text-[var(--color-text-tertiary)] capitalize">{user.plan} plan</div>
+            </div>
+            <ChevronDown size={16} className="text-[var(--color-text-tertiary)]" />
+          </div>
+        </footer>
+      </aside>
+
+      {/* 移动端遮罩 */}
+      {isOpen && (
+        <div
+          className="fixed inset-0 bg-black/20 z-40 md:hidden"
+        />
+      )}
+    </>
+  );
+}
+
+// 侧边栏切换按钮
+export function SidebarToggle({ onClick }: { onClick?: () => void }) {
+  return (
+    <button
+      onClick={onClick}
+      className="w-9 h-9 flex items-center justify-center rounded-lg text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-hover)] hover:text-[var(--color-text-secondary)] transition-colors"
+      title="Toggle sidebar"
+    >
+      <PanelLeft size={20} />
+    </button>
+  );
+}

src/components/ui/AILogo.tsx

@@ -0,0 +1,26 @@
+'use client';
+
+import { cn } from '@/lib/utils';
+
+interface AILogoProps {
+  size?: number;
+  className?: string;
+}
+
+export function AILogo({ size = 48, className }: AILogoProps) {
+  return (
+    <svg
+      viewBox="0 0 48 48"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      width={size}
+      height={size}
+      className={cn('text-[var(--color-primary)]', className)}
+    >
+      <path
+        d="M24 4L26.5 18.5L41 16L29.5 24L41 32L26.5 29.5L24 44L21.5 29.5L7 32L18.5 24L7 16L21.5 18.5L24 4Z"
+        fill="currentColor"
+      />
+    </svg>
+  );
+}

src/components/ui/Avatar.tsx

@@ -0,0 +1,31 @@
+'use client';
+
+import { cn } from '@/lib/utils';
+
+interface AvatarProps {
+  name: string;
+  size?: 'sm' | 'md' | 'lg';
+  className?: string;
+}
+
+export function Avatar({ name, size = 'md', className }: AvatarProps) {
+  const initial = name.charAt(0).toUpperCase();
+
+  const sizeClasses = {
+    sm: 'w-6 h-6 text-xs',
+    md: 'w-8 h-8 text-sm',
+    lg: 'w-10 h-10 text-base',
+  };
+
+  return (
+    <div
+      className={cn(
+        'flex items-center justify-center rounded-full bg-[var(--color-primary)] text-white font-semibold',
+        sizeClasses[size],
+        className
+      )}
+    >
+      {initial}
+    </div>
+  );
+}

src/components/ui/Toggle.tsx

@@ -0,0 +1,32 @@
+'use client';
+
+import { cn } from '@/lib/utils';
+
+interface ToggleProps {
+  checked: boolean;
+  onChange: (checked: boolean) => void;
+  className?: string;
+}
+
+export function Toggle({ checked, onChange, className }: ToggleProps) {
+  return (
+    <button
+      type="button"
+      role="switch"
+      aria-checked={checked}
+      onClick={() => onChange(!checked)}
+      className={cn(
+        'relative w-11 h-6 rounded-full transition-colors duration-150 ease-in-out',
+        checked ? 'bg-[var(--color-primary)]' : 'bg-[var(--color-border)]',
+        className
+      )}
+    >
+      <span
+        className={cn(
+          'absolute top-0.5 left-0.5 w-5 h-5 bg-white rounded-full shadow-sm transition-transform duration-150 ease-in-out',
+          checked && 'translate-x-5'
+        )}
+      />
+    </button>
+  );
+}

src/data/mock.ts

@@ -0,0 +1,82 @@
+import type { Model, Tool, ChatHistory, Message, User, QuickAction } from '@/types';
+
+// 模型列表
+export const models: Model[] = [
+  { id: 'haiku', name: 'Haiku 4.5', tag: 'Fast' },
+  { id: 'sonnet', name: 'Sonnet 4.5', tag: 'Balanced' },
+  { id: 'opus', name: 'Opus 4.5', tag: 'Powerful' },
+];
+
+// 工具列表
+export const tools: Tool[] = [
+  { id: 'web-search', name: 'Web Search', icon: 'Search', enabled: true },
+  { id: 'code-execution', name: 'Code Execution', icon: 'Terminal', enabled: false },
+  { id: 'web-fetch', name: 'Web Fetch', icon: 'Globe', enabled: true },
+];
+
+// 聊天历史
+export const chatHistories: ChatHistory[] = [
+  { id: '1', title: '你好', createdAt: new Date(), updatedAt: new Date() },
+  { id: '2', title: 'React组件开发', createdAt: new Date(), updatedAt: new Date() },
+  { id: '3', title: 'TypeScript类型问题', createdAt: new Date(), updatedAt: new Date() },
+];
+
+// 示例消息
+export const sampleMessages: Message[] = [
+  {
+    id: '1',
+    role: 'user',
+    content: '你的模型id',
+    timestamp: new Date(),
+  },
+  {
+    id: '2',
+    role: 'assistant',
+    content: `我是 **Claude 4.5 Sonnet**，由 Anthropic 制作。
+
+不过需要说明的是，我目前运行在 cchcode (openclaude.me) 这个平台上，而不是 Anthropic 的官方平台。具体的模型 ID（如 API 调用时使用的标识符）可能是：
+
+- \`claude-4.5-sonnet\`（如果这是实际的模型版本）
+- 或类似的标识符
+
+但我需要诚实地说：根据我的知识（截至 2024 年底），Anthropic 官方发布的最新版本是 **Claude 3.5 Sonnet**（模型 ID 通常是 \`claude-3-5-sonnet-20241022\` 或类似格式）。"Claude 4.5 Sonnet" 这个名称可能是：
+
+1. cchcode 平台的内部命名
+2. 我被告知的身份信息
+3. 或者是在我知识截止日期之后发布的新版本
+
+如果你想确认具体使用的是哪个模型版本，建议查看 cchcode 平台的设置或文档说明。你想了解这个信息是为了什么目的呢？也许我可以帮你解决实际问题。`,
+    timestamp: new Date(),
+  },
+];
+
+// 当前用户
+export const currentUser: User = {
+  id: '1',
+  email: 'cisyamgao@gmail.com',
+  name: 'cisyamgao',
+  plan: 'free',
+};
+
+// 快捷操作
+export const quickActions: QuickAction[] = [
+  { id: 'code', label: 'Code', icon: 'Code', prompt: '帮我写一段代码...' },
+  { id: 'write', label: 'Write', icon: 'PenTool', prompt: '帮我写一篇...' },
+  { id: 'learn', label: 'Learn', icon: 'GraduationCap', prompt: '帮我学习...' },
+  { id: 'life', label: 'Life stuff', icon: 'Home', prompt: '帮我处理生活中的事情...' },
+  { id: 'surprise', label: 'Surprise me', icon: 'Sparkles', prompt: '给我一些惊喜...' },
+];
+
+// 获取问候语
+export function getGreeting(name: string): string {
+  const hour = new Date().getHours();
+  let greeting = 'Good morning';
+
+  if (hour >= 12 && hour < 18) {
+    greeting = 'Good afternoon';
+  } else if (hour >= 18) {
+    greeting = 'Good evening';
+  }
+
+  return `${greeting}, ${name}`;
+}

src/lib/utils.ts

@@ -0,0 +1,5 @@
+import { clsx, type ClassValue } from 'clsx';
+
+export function cn(...inputs: ClassValue[]) {
+  return clsx(inputs);
+}

src/types/index.ts

@@ -0,0 +1,57 @@
+// 模型类型
+export interface Model {
+  id: string;
+  name: string;
+  tag: string;
+}
+
+// 工具类型
+export interface Tool {
+  id: string;
+  name: string;
+  icon: string;
+  enabled: boolean;
+}
+
+// 聊天记录类型
+export interface ChatHistory {
+  id: string;
+  title: string;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+// 消息类型
+export interface Message {
+  id: string;
+  role: 'user' | 'assistant';
+  content: string;
+  timestamp: Date;
+}
+
+// 用户类型
+export interface User {
+  id: string;
+  email: string;
+  name: string;
+  plan: 'free' | 'pro' | 'enterprise';
+  avatar?: string;
+}
+
+// 设置类型
+export interface Settings {
+  defaultModel: string;
+  theme: 'light' | 'dark' | 'system';
+  language: string;
+  webSearchEnabled: boolean;
+  codeExecutionEnabled: boolean;
+  chatHistoryEnabled: boolean;
+}
+
+// 快捷操作类型
+export interface QuickAction {
+  id: string;
+  label: string;
+  icon: string;
+  prompt?: string;
+}