style(样式): 优化全局背景色样式

- 为 html 元素添加背景色变量
- 设置最小高度为 100%

src/app/api/conversations/[id]/summary/route.ts

@@ -0,0 +1,118 @@
+import { NextResponse } from 'next/server';
+import { db } from '@/drizzle/db';
+import { conversations } from '@/drizzle/schema';
+import { eq } from 'drizzle-orm';
+import { getCurrentUser } from '@/lib/auth';
+
+interface UpdateSummaryRequest {
+  summary: string;
+}
+
+// PUT /api/conversations/[id]/summary - 更新对话摘要
+export async function PUT(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id: conversationId } = await params;
+    const body: UpdateSummaryRequest = await request.json();
+    const { summary } = body;
+
+    // 获取当前登录用户
+    const user = await getCurrentUser();
+    if (!user) {
+      return NextResponse.json(
+        { error: '请先登录' },
+        { status: 401 }
+      );
+    }
+
+    // 验证对话是否存在且属于当前用户
+    const conversation = await db.query.conversations.findFirst({
+      where: eq(conversations.conversationId, conversationId),
+    });
+
+    if (!conversation) {
+      return NextResponse.json(
+        { error: '对话不存在' },
+        { status: 404 }
+      );
+    }
+
+    if (conversation.userId !== user.userId) {
+      return NextResponse.json(
+        { error: '无权访问此对话' },
+        { status: 403 }
+      );
+    }
+
+    // 更新摘要
+    await db
+      .update(conversations)
+      .set({
+        summary,
+        updatedAt: new Date(),
+      })
+      .where(eq(conversations.conversationId, conversationId));
+
+    return NextResponse.json({
+      success: true,
+      message: '摘要已更新',
+    });
+  } catch (error) {
+    console.error('[API/conversations/summary] 更新摘要错误:', error);
+    return NextResponse.json(
+      { error: '更新摘要失败' },
+      { status: 500 }
+    );
+  }
+}
+
+// GET /api/conversations/[id]/summary - 获取对话摘要
+export async function GET(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const { id: conversationId } = await params;
+
+    // 获取当前登录用户
+    const user = await getCurrentUser();
+    if (!user) {
+      return NextResponse.json(
+        { error: '请先登录' },
+        { status: 401 }
+      );
+    }
+
+    // 获取对话
+    const conversation = await db.query.conversations.findFirst({
+      where: eq(conversations.conversationId, conversationId),
+    });
+
+    if (!conversation) {
+      return NextResponse.json(
+        { error: '对话不存在' },
+        { status: 404 }
+      );
+    }
+
+    if (conversation.userId !== user.userId) {
+      return NextResponse.json(
+        { error: '无权访问此对话' },
+        { status: 403 }
+      );
+    }
+
+    return NextResponse.json({
+      summary: conversation.summary,
+      hasSummary: !!conversation.summary,
+    });
+  } catch (error) {
+    console.error('[API/conversations/summary] 获取摘要错误:', error);
+    return NextResponse.json(
+      { error: '获取摘要失败' },
+      { status: 500 }
+    );
+  }
+}

src/app/api/summary/generate/route.ts

@@ -0,0 +1,293 @@
+import { NextResponse } from 'next/server';
+import { db } from '@/drizzle/db';
+import { userSettings, conversations } from '@/drizzle/schema';
+import { eq } from 'drizzle-orm';
+import { getCurrentUser } from '@/lib/auth';
+import { decryptApiKey } from '@/lib/crypto';
+
+interface SummaryMessage {
+  role: 'user' | 'assistant';
+  content: string;
+}
+
+interface SummaryOptions {
+  length: 'short' | 'standard' | 'detailed';
+  style: 'bullet' | 'narrative';
+}
+
+interface GenerateSummaryRequest {
+  conversationId: string;
+  messages: SummaryMessage[];
+  options: SummaryOptions;
+}
+
+// 摘要长度配置
+const LENGTH_CONFIG = {
+  short: { maxWords: 50, description: '50字左右的核心要点' },
+  standard: { maxWords: 150, description: '150字左右的详细摘要' },
+  detailed: { maxWords: 300, description: '300字左右的完整分析' },
+};
+
+// 摘要风格配置
+const STYLE_CONFIG = {
+  bullet: { description: '使用结构化的要点列表，每个要点独立成行' },
+  narrative: { description: '使用连贯的段落描述，像讲故事一样自然流畅' },
+};
+
+// 生成摘要 Prompt
+function buildSummaryPrompt(messages: SummaryMessage[], options: SummaryOptions): string {
+  const lengthConfig = LENGTH_CONFIG[options.length];
+  const styleConfig = STYLE_CONFIG[options.style];
+
+  // 将消息格式化为对话文本
+  const conversationText = messages
+    .map((msg) => `${msg.role === 'user' ? '用户' : 'AI助手'}: ${msg.content}`)
+    .join('\n\n');
+
+  return `你是一个专业的对话摘要生成器。请根据以下对话内容生成摘要。
+
+## 摘要要求
+
+**长度要求**: ${lengthConfig.description}
+**风格要求**: ${styleConfig.description}
+
+## 输出格式
+
+请按照以下 Markdown 格式输出摘要：
+
+${options.style === 'bullet' ? `
+## 对话摘要
+
+[一句话概述对话的主题和目的]
+
+### 关键要点
+
+- [要点1：具体的讨论内容或结论]
+- [要点2：具体的讨论内容或结论]
+- [要点3：具体的讨论内容或结论]
+${options.length === 'detailed' ? `- [要点4]
+- [要点5]` : ''}
+
+### 结论
+
+[总结性的结论或建议]
+` : `
+## 对话摘要
+
+[用连贯的段落描述对话的主要内容，包括讨论的主题、关键观点和最终结论。语言要自然流畅，像在向别人转述这段对话一样。]
+`}
+
+## 对话内容
+
+${conversationText}
+
+---
+
+请直接输出摘要内容，不要有任何开场白或结束语。`;
+}
+
+// 规范化 URL
+function normalizeBaseUrl(url: string): string {
+  return url.replace(/\/+$/, '');
+}
+
+// POST /api/summary/generate - 生成对话摘要
+export async function POST(request: Request) {
+  try {
+    const body: GenerateSummaryRequest = await request.json();
+    const { conversationId, messages, options } = body;
+
+    // 验证请求参数
+    if (!conversationId || !messages || messages.length === 0) {
+      return NextResponse.json(
+        { error: '缺少必要参数' },
+        { status: 400 }
+      );
+    }
+
+    // 获取当前登录用户
+    const user = await getCurrentUser();
+    if (!user) {
+      return NextResponse.json(
+        { error: '请先登录' },
+        { status: 401 }
+      );
+    }
+
+    // 获取用户设置
+    const settings = await db.query.userSettings.findFirst({
+      where: eq(userSettings.userId, user.userId),
+    });
+
+    if (!settings?.cchApiKey) {
+      return NextResponse.json(
+        { error: '请先在设置中配置您的 API Key' },
+        { status: 400 }
+      );
+    }
+
+    // 解密 API Key
+    const decryptedApiKey = decryptApiKey(settings.cchApiKey);
+    const cchUrl = settings.cchUrl || process.env.CCH_DEFAULT_URL || 'https://claude.leocoder.cn/';
+    const apiFormat = (settings.apiFormat as 'claude' | 'openai') || 'claude';
+
+    // 构建摘要 Prompt
+    const summaryPrompt = buildSummaryPrompt(messages, options);
+
+    // 创建流式响应
+    const encoder = new TextEncoder();
+    const stream = new ReadableStream({
+      async start(controller) {
+        try {
+          let apiUrl: string;
+          let requestBody: object;
+          let headers: Record<string, string>;
+
+          if (apiFormat === 'openai') {
+            // OpenAI 兼容格式
+            apiUrl = `${normalizeBaseUrl(cchUrl)}/v1/chat/completions`;
+            headers = {
+              'Content-Type': 'application/json',
+              'Authorization': `Bearer ${decryptedApiKey}`,
+            };
+            requestBody = {
+              model: settings.defaultModel || 'claude-sonnet-4-5-20250929',
+              messages: [
+                { role: 'user', content: summaryPrompt },
+              ],
+              stream: true,
+              max_tokens: 2048,
+              temperature: 0.7,
+            };
+          } else {
+            // Claude 原生格式
+            apiUrl = `${normalizeBaseUrl(cchUrl)}/v1/messages`;
+            headers = {
+              'Content-Type': 'application/json',
+              'x-api-key': decryptedApiKey,
+              'anthropic-version': '2023-06-01',
+            };
+            requestBody = {
+              model: settings.defaultModel || 'claude-sonnet-4-5-20250929',
+              max_tokens: 2048,
+              messages: [
+                { role: 'user', content: summaryPrompt },
+              ],
+              stream: true,
+            };
+          }
+
+          console.log('[API/summary] 开始生成摘要，消息数量:', messages.length);
+
+          const response = await fetch(apiUrl, {
+            method: 'POST',
+            headers,
+            body: JSON.stringify(requestBody),
+          });
+
+          if (!response.ok) {
+            const errorText = await response.text();
+            console.error('[API/summary] API 调用失败:', response.status, errorText);
+            controller.enqueue(
+              encoder.encode(`data: ${JSON.stringify({ type: 'error', error: '生成摘要失败' })}\n\n`)
+            );
+            controller.close();
+            return;
+          }
+
+          const reader = response.body?.getReader();
+          if (!reader) {
+            controller.enqueue(
+              encoder.encode(`data: ${JSON.stringify({ type: 'error', error: '无法读取响应' })}\n\n`)
+            );
+            controller.close();
+            return;
+          }
+
+          const decoder = new TextDecoder();
+          let buffer = '';
+          let fullContent = '';
+
+          while (true) {
+            const { done, value } = await reader.read();
+
+            if (done) break;
+
+            buffer += decoder.decode(value, { stream: true });
+            const lines = buffer.split('\n');
+            buffer = lines.pop() || '';
+
+            for (const line of lines) {
+              if (!line.startsWith('data: ')) continue;
+
+              const data = line.slice(6).trim();
+              if (data === '[DONE]') continue;
+
+              try {
+                const parsed = JSON.parse(data);
+
+                if (apiFormat === 'openai') {
+                  // OpenAI 格式响应
+                  const delta = parsed.choices?.[0]?.delta?.content;
+                  if (delta) {
+                    fullContent += delta;
+                    controller.enqueue(
+                      encoder.encode(`data: ${JSON.stringify({ type: 'content', content: delta })}\n\n`)
+                    );
+                  }
+                } else {
+                  // Claude 格式响应
+                  if (parsed.type === 'content_block_delta') {
+                    const delta = parsed.delta?.text;
+                    if (delta) {
+                      fullContent += delta;
+                      controller.enqueue(
+                        encoder.encode(`data: ${JSON.stringify({ type: 'content', content: delta })}\n\n`)
+                      );
+                    }
+                  }
+                }
+              } catch {
+                // 忽略解析错误
+              }
+            }
+          }
+
+          // 保存摘要到数据库
+          if (fullContent) {
+            await db
+              .update(conversations)
+              .set({ summary: fullContent, updatedAt: new Date() })
+              .where(eq(conversations.conversationId, conversationId));
+
+            console.log('[API/summary] 摘要已保存到数据库');
+          }
+
+          // 发送完成信号
+          controller.enqueue(encoder.encode('data: [DONE]\n\n'));
+          controller.close();
+        } catch (error) {
+          console.error('[API/summary] 生成摘要错误:', error);
+          controller.enqueue(
+            encoder.encode(`data: ${JSON.stringify({ type: 'error', error: '生成摘要时发生错误' })}\n\n`)
+          );
+          controller.close();
+        }
+      },
+    });
+
+    return new Response(stream, {
+      headers: {
+        'Content-Type': 'text/event-stream',
+        'Cache-Control': 'no-cache',
+        'Connection': 'keep-alive',
+      },
+    });
+  } catch (error) {
+    console.error('[API/summary] 请求处理错误:', error);
+    return NextResponse.json(
+      { error: '处理请求时发生错误' },
+      { status: 500 }
+    );
+  }
+}

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

@@ -13,6 +13,7 @@ import { PromptOptimizer } from '@/components/features/PromptOptimizer';
 import { LinkPreviewModal } from '@/components/features/LinkPreviewModal';
 import { ExportDropdown } from '@/components/features/ExportDropdown';
 import { ShareModal } from '@/components/features/ShareModal';
+import { SummaryButton } from '@/components/features/SummaryGenerator';
 import { cn } from '@/lib/utils';
 import { useConversation, useConversations } from '@/hooks/useConversations';
 import { useStreamChat, type ChatMessage } from '@/hooks/useStreamChat';
@@ -441,7 +442,7 @@ export default function ChatPage({ params }: PageProps) {
   }
 
   return (
-    <div className="flex min-h-screen">
+    <div className="flex min-h-screen bg-[var(--color-bg-secondary)]">
       {/* 侧边栏 */}
       <Sidebar
         isOpen={sidebarOpen}
@@ -451,7 +452,7 @@ export default function ChatPage({ params }: PageProps) {
       {/* 主内容区 */}
       <main
         className={cn(
-          'flex-1 flex flex-col min-h-screen transition-all duration-300',
+          'flex-1 flex flex-col min-h-screen transition-all duration-300 bg-[var(--color-bg-secondary)]',
           sidebarOpen ? 'ml-[var(--sidebar-width)]' : 'ml-0'
         )}
       >
@@ -557,6 +558,17 @@ export default function ChatPage({ params }: PageProps) {
               </button>
             )}
 
+            {/* 智能摘要按钮 */}
+            <SummaryButton
+              conversationId={chatId}
+              messages={messages.map(m => ({
+                role: m.role,
+                content: m.content,
+              }))}
+              hasSummary={!!conversation?.summary}
+              existingSummary={conversation?.summary}
+            />
+
             <button
               onClick={() => setShareModalOpen(true)}
               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"
@@ -659,12 +671,7 @@ export default function ChatPage({ params }: PageProps) {
         </div>
 
         {/* 固定底部输入框 */}
-        <div
-          className="sticky bottom-0 pt-4 z-20"
-          style={{
-            background: `linear-gradient(to top, var(--color-bg-secondary) 0%, var(--color-bg-secondary) 80%, transparent 100%)`
-          }}
-        >
+        <div className="sticky bottom-0 pt-4 z-20 bg-[var(--color-bg-secondary)]">
           <div className="max-w-[900px] mx-auto px-4 pb-4 pl-[60px]">
             {isStreaming && (
               <div className="flex justify-center mb-3">

src/app/globals.css

@@ -168,6 +168,8 @@
 html {
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
+  background-color: var(--color-bg-secondary);
+  min-height: 100%;
 }
 
 body {

src/components/features/SummaryGenerator/SummaryButton.tsx

@@ -0,0 +1,69 @@
+'use client';
+
+import { useState } from 'react';
+import { Sparkles } from 'lucide-react';
+import { SummaryModal } from './SummaryModal';
+import type { SummaryMessage } from './types';
+import { Tooltip } from '@/components/ui/Tooltip';
+
+interface SummaryButtonProps {
+  conversationId: string;
+  messages: SummaryMessage[];
+  hasSummary?: boolean;
+  existingSummary?: string | null;
+  onSummaryGenerated?: (summary: string) => void;
+  className?: string;
+}
+
+/**
+ * 智能摘要触发按钮
+ * 集成到对话头部
+ */
+export function SummaryButton({
+  conversationId,
+  messages,
+  hasSummary = false,
+  existingSummary,
+  onSummaryGenerated,
+  className = '',
+}: SummaryButtonProps) {
+  const [isModalOpen, setIsModalOpen] = useState(false);
+
+  const handleClick = () => {
+    setIsModalOpen(true);
+  };
+
+  const handleClose = () => {
+    setIsModalOpen(false);
+  };
+
+  return (
+    <>
+      <Tooltip content="智能摘要" position="bottom">
+        <button
+          type="button"
+          onClick={handleClick}
+          className={`relative p-2 rounded text-[var(--color-text-secondary)] hover:bg-[var(--color-bg-secondary)] hover:text-[var(--color-primary)] transition-all duration-150 ${className}`}
+          aria-label="生成智能摘要"
+        >
+          <Sparkles size={18} />
+
+          {/* 已有摘要指示器 */}
+          {hasSummary && (
+            <span className="absolute top-1 right-1 w-2 h-2 bg-[var(--color-primary)] rounded-full border-2 border-[var(--color-bg-primary)] animate-pulse" />
+          )}
+        </button>
+      </Tooltip>
+
+      {/* 摘要 Modal */}
+      <SummaryModal
+        isOpen={isModalOpen}
+        onClose={handleClose}
+        conversationId={conversationId}
+        messages={messages}
+        existingSummary={existingSummary}
+        onSummaryGenerated={onSummaryGenerated}
+      />
+    </>
+  );
+}

src/components/features/SummaryGenerator/SummaryContent.tsx

@@ -0,0 +1,130 @@
+'use client';
+
+import { useState } from 'react';
+import { Clock, MessageSquare, Copy, Check, BookmarkPlus, RefreshCw } from 'lucide-react';
+import { MarkdownRenderer } from '@/components/markdown/MarkdownRenderer';
+import type { SummaryData } from './types';
+import { toast } from 'sonner';
+
+interface SummaryContentProps {
+  summary: SummaryData;
+  isStreaming?: boolean;
+  streamingContent?: string;
+  onRegenerate?: () => void;
+  onSaveToNote?: () => void;
+  conversationId?: string;
+}
+
+/**
+ * 摘要内容展示组件
+ * 支持 Markdown 渲染和操作按钮
+ */
+export function SummaryContent({
+  summary,
+  isStreaming = false,
+  streamingContent = '',
+  onRegenerate,
+  onSaveToNote,
+}: SummaryContentProps) {
+  const [copied, setCopied] = useState(false);
+
+  // 复制摘要内容
+  const handleCopy = async () => {
+    const content = isStreaming ? streamingContent : summary.content;
+    try {
+      await navigator.clipboard.writeText(content);
+      setCopied(true);
+      toast.success('已复制到剪贴板');
+      setTimeout(() => setCopied(false), 2000);
+    } catch {
+      toast.error('复制失败');
+    }
+  };
+
+  // 格式化时间
+  const formatTime = (date: Date) => {
+    const now = new Date();
+    const diff = now.getTime() - date.getTime();
+    const minutes = Math.floor(diff / 60000);
+
+    if (minutes < 1) return '刚刚生成';
+    if (minutes < 60) return `${minutes} 分钟前`;
+
+    const hours = Math.floor(minutes / 60);
+    if (hours < 24) return `${hours} 小时前`;
+
+    return date.toLocaleDateString('zh-CN');
+  };
+
+  const displayContent = isStreaming ? streamingContent : summary.content;
+
+  return (
+    <div className="flex flex-col h-full">
+      {/* 摘要内容区域 */}
+      <div className="flex-1 overflow-y-auto px-6 py-5 max-h-[500px] summary-content-wrapper">
+        {isStreaming ? (
+          <div className="prose prose-sm max-w-none summary-prose">
+            <MarkdownRenderer content={displayContent} />
+            {/* 流式光标 */}
+            <span className="inline-block w-0.5 h-5 bg-[var(--color-primary)] ml-0.5 animate-pulse" />
+          </div>
+        ) : (
+          <div className="prose prose-sm max-w-none summary-prose">
+            <MarkdownRenderer content={displayContent} />
+          </div>
+        )}
+      </div>
+
+      {/* 底部操作栏 */}
+      {!isStreaming && (
+        <div className="flex items-center justify-between px-6 py-4 border-t border-[var(--color-border)] rounded-b bg-[var(--color-bg-tertiary)]">
+          {/* 元信息 */}
+          <div className="flex items-center gap-4">
+            <div className="flex items-center gap-1.5 text-[12px] text-[var(--color-text-tertiary)]">
+              <Clock size={14} />
+              <span>{formatTime(summary.generatedAt)}</span>
+            </div>
+            <div className="flex items-center gap-1.5 text-[12px] text-[var(--color-text-tertiary)]">
+              <MessageSquare size={14} />
+              <span>{summary.messageCount} 条消息</span>
+            </div>
+          </div>
+
+          {/* 操作按钮 */}
+          <div className="flex items-center gap-2">
+            <button
+              type="button"
+              onClick={handleCopy}
+              className={`flex items-center gap-1.5 px-3 py-1.5 rounded text-[13px] font-medium border transition-all duration-150 ${copied ? 'bg-green-500 border-green-500 text-white' : 'bg-[var(--color-bg-primary)] border-[var(--color-border)] text-[var(--color-text-secondary)] hover:border-[var(--color-primary)] hover:text-[var(--color-primary)]'}`}
+            >
+              {copied ? <Check size={14} /> : <Copy size={14} />}
+              {copied ? '已复制' : '复制'}
+            </button>
+
+            {onSaveToNote && (
+              <button
+                type="button"
+                onClick={onSaveToNote}
+                className="flex items-center gap-1.5 px-3 py-1.5 rounded text-[13px] font-medium border border-[var(--color-border)] bg-[var(--color-bg-primary)] text-[var(--color-text-secondary)] hover:border-[var(--color-primary)] hover:text-[var(--color-primary)] transition-all duration-150"
+              >
+                <BookmarkPlus size={14} />
+                保存笔记
+              </button>
+            )}
+
+            {onRegenerate && (
+              <button
+                type="button"
+                onClick={onRegenerate}
+                className="flex items-center gap-1.5 px-3 py-1.5 rounded text-[13px] font-medium bg-[var(--color-primary)] text-white hover:bg-[var(--color-primary-hover)] transition-all duration-150"
+              >
+                <RefreshCw size={14} />
+                重新生成
+              </button>
+            )}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/features/SummaryGenerator/SummaryModal.tsx

@@ -0,0 +1,380 @@
+'use client';
+
+import { useEffect, useCallback, useState } from 'react';
+import { createPortal } from 'react-dom';
+import { X, Sparkles, MessageSquare, Loader2, AlertCircle, Eye, RefreshCw } from 'lucide-react';
+import { SummaryOptions } from './SummaryOptions';
+import { SummaryContent } from './SummaryContent';
+import { useSummary } from './useSummary';
+import type { SummaryMessage } from './types';
+import { toast } from 'sonner';
+
+interface SummaryModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  conversationId: string;
+  messages: SummaryMessage[];
+  existingSummary?: string | null;
+  onSummaryGenerated?: (summary: string) => void;
+}
+
+/**
+ * 智能摘要 Modal 组件
+ * 包含选项配置、生成中状态、生成结果展示
+ */
+export function SummaryModal({
+  isOpen,
+  onClose,
+  conversationId,
+  messages,
+  existingSummary,
+  onSummaryGenerated,
+}: SummaryModalProps) {
+  const {
+    status,
+    summary,
+    error,
+    streamingContent,
+    options,
+    setOptions,
+    generate,
+    reset,
+    saveSummary,
+  } = useSummary();
+
+  // 视图模式：'view' 查看已有摘要，'generate' 生成新摘要
+  const [viewMode, setViewMode] = useState<'view' | 'generate'>(
+    existingSummary ? 'view' : 'generate'
+  );
+
+  // 客户端挂载状态（用于 Portal SSR 安全）
+  const [mounted, setMounted] = useState(false);
+
+  // 组件挂载后设置 mounted 状态
+  useEffect(() => {
+    setMounted(true);
+    return () => setMounted(false);
+  }, []);
+
+  // 当 modal 打开时，根据是否有已有摘要设置默认视图
+  useEffect(() => {
+    if (isOpen) {
+      setViewMode(existingSummary ? 'view' : 'generate');
+    }
+  }, [isOpen, existingSummary]);
+
+  // 关闭时重置状态
+  const handleClose = useCallback(() => {
+    if (status !== 'generating') {
+      reset();
+      onClose();
+    }
+  }, [status, reset, onClose]);
+
+  // ESC 键关闭
+  useEffect(() => {
+    const handleEsc = (e: KeyboardEvent) => {
+      if (e.key === 'Escape' && status !== 'generating') {
+        handleClose();
+      }
+    };
+
+    if (isOpen) {
+      document.addEventListener('keydown', handleEsc);
+      return () => document.removeEventListener('keydown', handleEsc);
+    }
+  }, [isOpen, status, handleClose]);
+
+  // 阻止背景滚动
+  useEffect(() => {
+    if (isOpen) {
+      document.body.style.overflow = 'hidden';
+      return () => {
+        document.body.style.overflow = '';
+      };
+    }
+  }, [isOpen]);
+
+  // 开始生成摘要
+  const handleGenerate = async () => {
+    await generate(conversationId, messages);
+  };
+
+  // 重新生成
+  const handleRegenerate = async () => {
+    reset();
+    await generate(conversationId, messages);
+  };
+
+  // 保存到笔记
+  const handleSaveToNote = async () => {
+    if (!summary) return;
+
+    try {
+      const response = await fetch('/api/notes', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          title: '对话摘要',
+          content: summary.content,
+          conversationId,
+          tags: ['摘要', '自动生成'],
+        }),
+      });
+
+      if (response.ok) {
+        toast.success('已保存到笔记');
+      } else {
+        toast.error('保存失败');
+      }
+    } catch {
+      toast.error('保存失败');
+    }
+  };
+
+  // 保存摘要到对话
+  useEffect(() => {
+    if (status === 'completed' && summary) {
+      saveSummary(conversationId);
+      onSummaryGenerated?.(summary.content);
+    }
+  }, [status, summary, conversationId, saveSummary, onSummaryGenerated]);
+
+  // SSR 安全检查：未挂载或未打开时不渲染
+  if (!mounted || !isOpen) return null;
+
+  // 使用 Portal 将 Modal 渲染到 body，脱离组件树的层叠上下文
+  return createPortal(
+    <div className="fixed inset-0 z-50 flex items-center justify-center">
+      {/* 背景遮罩 */}
+      <div
+        className="absolute inset-0 bg-black/50 backdrop-blur-sm"
+        style={{ animation: 'fadeIn 0.2s ease-out' }}
+        onClick={handleClose}
+      />
+
+      {/* Modal 内容 */}
+      <div
+        className="relative w-full max-w-[800px] mx-4 bg-[var(--color-bg-primary)] rounded-[4px] border border-[var(--color-border)] shadow-2xl overflow-hidden"
+        style={{ animation: 'scaleIn 0.2s ease-out' }}
+      >
+        {/* 头部 */}
+        <div className="flex items-center justify-between px-6 py-5 border-b border-[var(--color-border)]">
+          <div className="flex items-center gap-3">
+            <div className="p-2 rounded-[4px] bg-[var(--color-primary)]/10">
+              <Sparkles size={20} className="text-[var(--color-primary)]" />
+            </div>
+            <h2 className="text-[18px] font-semibold text-[var(--color-text-primary)]">
+              智能摘要
+            </h2>
+          </div>
+          <button
+            type="button"
+            onClick={handleClose}
+            disabled={status === 'generating'}
+            className="p-2 rounded-[4px] text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-secondary)] hover:text-[var(--color-text-primary)] disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-150"
+          >
+            <X size={20} />
+          </button>
+        </div>
+
+        {/* 内容区域 */}
+        {status === 'idle' && viewMode === 'view' && existingSummary && (
+          <div className="flex flex-col">
+            {/* 标签页切换 */}
+            <div className="flex items-center gap-2 px-6 pt-4 pb-3 border-b border-[var(--color-border)]">
+              <button
+                type="button"
+                onClick={() => setViewMode('view')}
+                className="flex items-center gap-1.5 px-3 py-1.5 rounded-[4px] text-[13px] font-medium bg-[var(--color-primary)]/10 text-[var(--color-primary)] border border-[var(--color-primary)]/30"
+              >
+                <Eye size={14} />
+                查看摘要
+              </button>
+              <button
+                type="button"
+                onClick={() => setViewMode('generate')}
+                className="flex items-center gap-1.5 px-3 py-1.5 rounded-[4px] text-[13px] font-medium text-[var(--color-text-secondary)] hover:bg-[var(--color-bg-secondary)] border border-transparent hover:border-[var(--color-border)] transition-all duration-150"
+              >
+                <RefreshCw size={14} />
+                重新生成
+              </button>
+            </div>
+
+            {/* 已有摘要内容 */}
+            <SummaryContent
+              summary={{
+                content: existingSummary,
+                generatedAt: new Date(),
+                messageCount: messages.length,
+                options,
+              }}
+              onRegenerate={() => setViewMode('generate')}
+              conversationId={conversationId}
+            />
+          </div>
+        )}
+
+        {status === 'idle' && (viewMode === 'generate' || !existingSummary) && (
+          <div className="p-6">
+            {/* 如果有现有摘要，显示标签页切换 */}
+            {existingSummary && (
+              <div className="flex items-center gap-2 mb-5 pb-4 border-b border-[var(--color-border)]">
+                <button
+                  type="button"
+                  onClick={() => setViewMode('view')}
+                  className="flex items-center gap-1.5 px-3 py-1.5 rounded-[4px] text-[13px] font-medium text-[var(--color-text-secondary)] hover:bg-[var(--color-bg-secondary)] border border-transparent hover:border-[var(--color-border)] transition-all duration-150"
+                >
+                  <Eye size={14} />
+                  查看摘要
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setViewMode('generate')}
+                  className="flex items-center gap-1.5 px-3 py-1.5 rounded-[4px] text-[13px] font-medium bg-[var(--color-primary)]/10 text-[var(--color-primary)] border border-[var(--color-primary)]/30"
+                >
+                  <RefreshCw size={14} />
+                  重新生成
+                </button>
+              </div>
+            )}
+
+            {/* 选项配置 */}
+            <SummaryOptions
+              options={options}
+              onChange={setOptions}
+            />
+
+            {/* 生成按钮 */}
+            <button
+              type="button"
+              onClick={handleGenerate}
+              disabled={messages.length === 0}
+              className="w-full mt-6 py-3.5 rounded text-[15px] font-semibold bg-gradient-to-r from-[var(--color-primary)] to-[#FF8A5C] text-white shadow-lg shadow-[var(--color-primary)]/25 hover:shadow-xl hover:shadow-[var(--color-primary)]/30 hover:-translate-y-0.5 disabled:opacity-50 disabled:cursor-not-allowed disabled:hover:translate-y-0 transition-all duration-200 flex items-center justify-center gap-2"
+            >
+              <Sparkles size={18} />
+              开始生成
+            </button>
+          </div>
+        )}
+
+        {/* 生成中状态 */}
+        {status === 'generating' && (
+          <div className="p-6">
+            {/* 进度条 */}
+            <div className="h-1 rounded-full bg-[var(--color-bg-secondary)] overflow-hidden mb-6">
+              <div
+                className="h-full bg-gradient-to-r from-[var(--color-primary)] via-[#FF8A5C] to-[var(--color-primary)]"
+                style={{
+                  width: '60%',
+                  backgroundSize: '200% 100%',
+                  animation: 'shimmer 1.5s linear infinite',
+                }}
+              />
+            </div>
+
+            {/* 流式内容 */}
+            {streamingContent ? (
+              <div className="prose prose-sm max-w-none mb-6 max-h-[400px] overflow-y-auto">
+                <SummaryContent
+                  summary={{
+                    content: streamingContent,
+                    generatedAt: new Date(),
+                    messageCount: messages.length,
+                    options,
+                  }}
+                  isStreaming={true}
+                  streamingContent={streamingContent}
+                />
+              </div>
+            ) : (
+              <div className="flex items-center justify-center py-12">
+                <div className="text-center">
+                  <Loader2 size={32} className="mx-auto mb-3 text-[var(--color-primary)] animate-spin" />
+                  <p className="text-[14px] text-[var(--color-text-secondary)]">
+                    正在分析 {messages.length} 条消息...
+                  </p>
+                </div>
+              </div>
+            )}
+
+            {/* 状态提示 */}
+            <div className="flex items-center gap-2.5 px-4 py-3 rounded bg-[var(--color-bg-secondary)]">
+              <div className="w-4 h-4 rounded-full border-2 border-[var(--color-border)] border-t-[var(--color-primary)] animate-spin" />
+              <span className="text-[13px] text-[var(--color-text-secondary)]">
+                AI 正在分析对话内容...
+              </span>
+            </div>
+          </div>
+        )}
+
+        {/* 生成完成状态 */}
+        {status === 'completed' && summary && (
+          <SummaryContent
+            summary={summary}
+            onRegenerate={handleRegenerate}
+            onSaveToNote={handleSaveToNote}
+            conversationId={conversationId}
+          />
+        )}
+
+        {/* 错误状态 */}
+        {status === 'error' && (
+          <div className="p-6">
+            <div className="flex flex-col items-center py-8">
+              <div className="p-3 rounded-full bg-red-500/10 mb-4">
+                <AlertCircle size={32} className="text-red-500" />
+              </div>
+              <h3 className="text-[16px] font-medium text-[var(--color-text-primary)] mb-2">
+                生成失败
+              </h3>
+              <p className="text-[14px] text-[var(--color-text-secondary)] text-center mb-6">
+                {error || '生成摘要时发生错误，请重试'}
+              </p>
+              <button
+                type="button"
+                onClick={handleRegenerate}
+                className="px-6 py-2.5 rounded text-[14px] font-medium bg-[var(--color-primary)] text-white hover:bg-[var(--color-primary-hover)] transition-all duration-150"
+              >
+                重新尝试
+              </button>
+            </div>
+          </div>
+        )}
+
+        {/* 底部信息（仅在生成新摘要状态显示） */}
+        {status === 'idle' && (viewMode === 'generate' || !existingSummary) && (
+          <div className="px-6 py-4 border-t border-[var(--color-border)] rounded-b bg-[var(--color-bg-tertiary)]">
+            <div className="flex items-center gap-1.5 text-[13px] text-[var(--color-text-secondary)]">
+              <MessageSquare size={14} className="text-[var(--color-primary)]" />
+              <span>将分析</span>
+              <span className="font-semibold text-[var(--color-primary)]">{messages.length}</span>
+              <span>条消息</span>
+            </div>
+          </div>
+        )}
+      </div>
+
+      {/* 全局动画样式 - 使用 global style 替代 styled-jsx */}
+      <style>
+        {`
+          @keyframes fadeIn {
+            from { opacity: 0; }
+            to { opacity: 1; }
+          }
+          @keyframes scaleIn {
+            from { opacity: 0; transform: scale(0.95); }
+            to { opacity: 1; transform: scale(1); }
+          }
+          @keyframes shimmer {
+            0% { background-position: 200% 0; }
+            100% { background-position: -200% 0; }
+          }
+        `}
+      </style>
+    </div>,
+    document.body
+  );
+}

src/components/features/SummaryGenerator/SummaryOptions.tsx

@@ -0,0 +1,86 @@
+'use client';
+
+import { AlignLeft, FileText } from 'lucide-react';
+import type { SummaryLength, SummaryStyle, SummaryOptions as SummaryOptionsType } from './types';
+import { SUMMARY_LENGTH_CONFIG, SUMMARY_STYLE_CONFIG } from './types';
+
+interface SummaryOptionsProps {
+  options: SummaryOptionsType;
+  onChange: (options: Partial<SummaryOptionsType>) => void;
+  disabled?: boolean;
+}
+
+/**
+ * 摘要选项配置组件
+ * 包含长度选择和风格选择
+ */
+export function SummaryOptions({ options, onChange, disabled = false }: SummaryOptionsProps) {
+  const lengthOptions: SummaryLength[] = ['short', 'standard', 'detailed'];
+  const styleOptions: SummaryStyle[] = ['bullet', 'narrative'];
+
+  const getButtonClass = (isActive: boolean) => {
+    const base = 'px-4 py-2 rounded text-[13px] font-medium border transition-all duration-150';
+    const active = 'bg-[var(--color-primary)]/10 border-[var(--color-primary)] text-[var(--color-primary)]';
+    const inactive = 'bg-[var(--color-bg-primary)] border-[var(--color-border)] text-[var(--color-text-secondary)] hover:border-[var(--color-primary)] hover:text-[var(--color-primary)]';
+    const disabledClass = disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer';
+    return `${base} ${isActive ? active : inactive} ${disabledClass}`;
+  };
+
+  return (
+    <div className="space-y-5">
+      {/* 摘要长度选择 */}
+      <div>
+        <label className="flex items-center gap-1.5 text-[13px] font-medium text-[var(--color-text-secondary)] mb-3">
+          <AlignLeft size={14} />
+          摘要长度
+        </label>
+        <div className="flex gap-2">
+          {lengthOptions.map((length) => {
+            const config = SUMMARY_LENGTH_CONFIG[length];
+            const isActive = options.length === length;
+
+            return (
+              <button
+                key={length}
+                type="button"
+                disabled={disabled}
+                onClick={() => onChange({ length })}
+                className={getButtonClass(isActive)}
+                title={config.description}
+              >
+                {config.label}
+              </button>
+            );
+          })}
+        </div>
+      </div>
+
+      {/* 摘要风格选择 */}
+      <div>
+        <label className="flex items-center gap-1.5 text-[13px] font-medium text-[var(--color-text-secondary)] mb-3">
+          <FileText size={14} />
+          摘要风格
+        </label>
+        <div className="flex gap-2">
+          {styleOptions.map((style) => {
+            const config = SUMMARY_STYLE_CONFIG[style];
+            const isActive = options.style === style;
+
+            return (
+              <button
+                key={style}
+                type="button"
+                disabled={disabled}
+                onClick={() => onChange({ style })}
+                className={getButtonClass(isActive)}
+                title={config.description}
+              >
+                {config.label}
+              </button>
+            );
+          })}
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/features/SummaryGenerator/index.ts

@@ -0,0 +1,31 @@
+/**
+ * 智能摘要功能模块
+ *
+ * 提供 AI 自动生成对话摘要的能力
+ */
+
+// 组件导出
+export { SummaryButton } from './SummaryButton';
+export { SummaryModal } from './SummaryModal';
+export { SummaryOptions } from './SummaryOptions';
+export { SummaryContent } from './SummaryContent';
+
+// Hook 导出
+export { useSummary } from './useSummary';
+
+// 类型导出
+export type {
+  SummaryLength,
+  SummaryStyle,
+  SummaryOptions as SummaryOptionsType,
+  SummaryStatus,
+  SummaryData,
+  SummaryMessage,
+  GenerateSummaryRequest,
+  GenerateSummaryResponse,
+  UseSummaryReturn,
+  ModalView,
+} from './types';
+
+// 常量导出
+export { SUMMARY_LENGTH_CONFIG, SUMMARY_STYLE_CONFIG } from './types';

src/components/features/SummaryGenerator/types.ts

@@ -0,0 +1,80 @@
+/**
+ * 智能摘要功能类型定义
+ */
+
+// 摘要长度选项
+export type SummaryLength = 'short' | 'standard' | 'detailed';
+
+// 摘要风格选项
+export type SummaryStyle = 'bullet' | 'narrative';
+
+// 摘要生成选项
+export interface SummaryOptions {
+  length: SummaryLength;
+  style: SummaryStyle;
+}
+
+// 摘要长度配置
+export const SUMMARY_LENGTH_CONFIG: Record<SummaryLength, { label: string; description: string; maxWords: number }> = {
+  short: { label: '简短', description: '约50字的核心要点', maxWords: 50 },
+  standard: { label: '标准', description: '约150字的详细摘要', maxWords: 150 },
+  detailed: { label: '详细', description: '约300字的完整分析', maxWords: 300 },
+};
+
+// 摘要风格配置
+export const SUMMARY_STYLE_CONFIG: Record<SummaryStyle, { label: string; description: string }> = {
+  bullet: { label: '要点式', description: '结构化的要点列表' },
+  narrative: { label: '叙述式', description: '连贯的段落描述' },
+};
+
+// 摘要生成状态
+export type SummaryStatus = 'idle' | 'generating' | 'completed' | 'error';
+
+// 摘要数据
+export interface SummaryData {
+  content: string;           // 摘要内容（Markdown）
+  generatedAt: Date;         // 生成时间
+  messageCount: number;      // 分析的消息数
+  options: SummaryOptions;   // 生成时使用的选项
+}
+
+// 摘要生成请求
+export interface GenerateSummaryRequest {
+  conversationId: string;
+  options: SummaryOptions;
+}
+
+// 摘要生成响应
+export interface GenerateSummaryResponse {
+  success: boolean;
+  summary?: string;
+  error?: string;
+  messageCount?: number;
+}
+
+// useSummary Hook 返回类型
+export interface UseSummaryReturn {
+  // 状态
+  status: SummaryStatus;
+  summary: SummaryData | null;
+  error: string | null;
+  streamingContent: string;
+
+  // 选项
+  options: SummaryOptions;
+  setOptions: (options: Partial<SummaryOptions>) => void;
+
+  // 操作
+  generate: (conversationId: string, messages: SummaryMessage[]) => Promise<void>;
+  reset: () => void;
+  saveSummary: (conversationId: string) => Promise<boolean>;
+}
+
+// 用于摘要生成的消息格式
+export interface SummaryMessage {
+  role: 'user' | 'assistant';
+  content: string;
+}
+
+// Modal 状态
+export type ModalView = 'options' | 'generating' | 'result';

src/components/features/SummaryGenerator/useSummary.ts

@@ -0,0 +1,169 @@
+'use client';
+
+import { useState, useCallback } from 'react';
+import type {
+  SummaryOptions,
+  SummaryStatus,
+  SummaryData,
+  SummaryMessage,
+  UseSummaryReturn,
+} from './types';
+
+/**
+ * 智能摘要核心 Hook
+ * 管理摘要生成的状态和操作
+ */
+export function useSummary(): UseSummaryReturn {
+  // 生成状态
+  const [status, setStatus] = useState<SummaryStatus>('idle');
+  const [summary, setSummary] = useState<SummaryData | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [streamingContent, setStreamingContent] = useState<string>('');
+
+  // 摘要选项
+  const [options, setOptionsState] = useState<SummaryOptions>({
+    length: 'standard',
+    style: 'bullet',
+  });
+
+  // 更新选项
+  const setOptions = useCallback((newOptions: Partial<SummaryOptions>) => {
+    setOptionsState(prev => ({ ...prev, ...newOptions }));
+  }, []);
+
+  // 生成摘要
+  const generate = useCallback(async (conversationId: string, messages: SummaryMessage[]) => {
+    if (messages.length === 0) {
+      setError('暂无对话内容');
+      return;
+    }
+
+    setStatus('generating');
+    setError(null);
+    setStreamingContent('');
+
+    try {
+      const response = await fetch('/api/summary/generate', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          conversationId,
+          messages,
+          options,
+        }),
+      });
+
+      if (!response.ok) {
+        const errorData = await response.json();
+        throw new Error(errorData.error || '生成摘要失败');
+      }
+
+      // 处理流式响应
+      const reader = response.body?.getReader();
+      const decoder = new TextDecoder();
+
+      if (!reader) {
+        throw new Error('无法读取响应');
+      }
+
+      let fullContent = '';
+
+      while (true) {
+        const { done, value } = await reader.read();
+
+        if (done) break;
+
+        const chunk = decoder.decode(value, { stream: true });
+        const lines = chunk.split('\n');
+
+        for (const line of lines) {
+          if (line.startsWith('data: ')) {
+            const data = line.slice(6);
+
+            if (data === '[DONE]') {
+              // 流式传输完成
+              setStatus('completed');
+              setSummary({
+                content: fullContent,
+                generatedAt: new Date(),
+                messageCount: messages.length,
+                options,
+              });
+              return;
+            }
+
+            try {
+              const parsed = JSON.parse(data);
+
+              if (parsed.type === 'content') {
+                fullContent += parsed.content;
+                setStreamingContent(fullContent);
+              } else if (parsed.type === 'error') {
+                throw new Error(parsed.error);
+              }
+            } catch {
+              // 忽略解析错误，可能是不完整的 JSON
+            }
+          }
+        }
+      }
+
+      // 如果没有收到 [DONE]，也设置为完成
+      if (fullContent) {
+        setStatus('completed');
+        setSummary({
+          content: fullContent,
+          generatedAt: new Date(),
+          messageCount: messages.length,
+          options,
+        });
+      }
+    } catch (err) {
+      setStatus('error');
+      setError(err instanceof Error ? err.message : '生成摘要时发生错误');
+    }
+  }, [options]);
+
+  // 重置状态
+  const reset = useCallback(() => {
+    setStatus('idle');
+    setSummary(null);
+    setError(null);
+    setStreamingContent('');
+  }, []);
+
+  // 保存摘要到数据库
+  const saveSummary = useCallback(async (conversationId: string): Promise<boolean> => {
+    if (!summary) return false;
+
+    try {
+      const response = await fetch(`/api/conversations/${conversationId}/summary`, {
+        method: 'PUT',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          summary: summary.content,
+        }),
+      });
+
+      return response.ok;
+    } catch {
+      return false;
+    }
+  }, [summary]);
+
+  return {
+    status,
+    summary,
+    error,
+    streamingContent,
+    options,
+    setOptions,
+    generate,
+    reset,
+    saveSummary,
+  };
+}