完成 UI-02 和 UI-03 聊天档案界面

src/renderer/src/App.tsx

@@ -6,6 +6,9 @@ import { AppShell } from './components/layout/AppShell'
 import { AppPage } from './components/layout/navigation'
 import { Contact, Message } from '../../shared/types'
 
+const SIDEBAR_MIN_WIDTH = 260
+const SIDEBAR_MAX_WIDTH = 380
+
 function EyeIcon({ hidden }: { hidden: boolean }): React.ReactElement {
   return (
     <svg viewBox="0 0 24 24" aria-hidden="true" focusable="false">
@@ -711,12 +714,20 @@ function App(): React.ReactElement {
     }
   }
 
-  const [sidebarWidth, setSidebarWidth] = useState(250)
+  const [sidebarWidth, setSidebarWidth] = useState(300)
   const [isResizing, setIsResizing] = useState(false)
+  const sidebarResizeStartRef = React.useRef({ x: 0, width: 300 })
 
-  const startResizing = React.useCallback(() => {
+  const startResizing = React.useCallback(
+    (mouseDownEvent: React.MouseEvent<HTMLDivElement>) => {
+      sidebarResizeStartRef.current = {
+        x: mouseDownEvent.clientX,
+        width: sidebarWidth
+      }
       setIsResizing(true)
-  }, [])
+    },
+    [sidebarWidth]
+  )
 
   const stopResizing = React.useCallback(() => {
     setIsResizing(false)
@@ -725,7 +736,9 @@ function App(): React.ReactElement {
   const resize = React.useCallback(
     (mouseMoveEvent: MouseEvent) => {
       if (isResizing) {
-        setSidebarWidth(mouseMoveEvent.clientX)
+        const { x, width } = sidebarResizeStartRef.current
+        const nextWidth = width + mouseMoveEvent.clientX - x
+        setSidebarWidth(Math.min(SIDEBAR_MAX_WIDTH, Math.max(SIDEBAR_MIN_WIDTH, nextWidth)))
       }
     },
     [isResizing]
@@ -853,11 +866,13 @@ function App(): React.ReactElement {
         />
         <div className="resizer" onMouseDown={startResizing} />
         <ChatWindow
-          key={`${selectedContact?.md5}-${contentFilter}`}
+          key={selectedContact?.md5}
           contact={selectedContact}
           messages={messages}
           isLoadingMessages={isMessagesLoading}
           contentFilter={contentFilter}
+          dateRange={dateRange}
+          onContentFilterChange={setContentFilter}
           onRefresh={() => selectedContact && handleSelectContact(selectedContact)}
           onRefreshData={loadContacts}
         />

src/renderer/src/components/ChatWindow.tsx

@@ -1,20 +1,24 @@
-import React, { useEffect, useRef, useState } from 'react'
+import React, { useCallback, useEffect, useRef, useState } from 'react'
 import { Message, Contact } from '../../../shared/types'
-import { VoicePlayer } from './VoicePlayer'
-import { RichMessageBubble } from './RichMessageBubble'
-import { ImageBubble } from './ImageBubble'
-import { renderWechatEmojiText } from '../utils/wechatEmojiText'
 import {
   buildGroupReportInput,
   GROUP_REPORT_SYSTEM_PROMPT,
   parseGroupDailyReport
 } from '../utils/group-report'
+import { ChatHeader } from './chat/ChatHeader'
+import { ChatStatusBar } from './chat/ChatStatusBar'
+import { DataTrustBar } from './chat/DataTrustBar'
+import { EmptyConversationState } from './chat/EmptyConversationState'
+import { ExportRange } from './chat/ExportMenu'
+import { MessageList } from './chat/MessageList'
 
 interface ChatWindowProps {
   contact: Contact | null
   messages: Message[]
   isLoadingMessages?: boolean
   contentFilter?: string
+  dateRange?: string
+  onContentFilterChange?: (keyword: string) => void
   onRefresh?: () => void
   onRefreshData?: () => void
 }
@@ -29,6 +33,43 @@ const SUMMARY_DATE_OPTIONS: { value: SummaryDateRange; label: string }[] = [
 ]
 const MAX_RENDERED_MESSAGES = 600
 const REPORT_STEP_TIMEOUT_MS = 90_000
+const DATE_RANGE_LABELS: Record<string, string> = {
+  today: '今天',
+  yesterday: '昨日',
+  '7': '7 天',
+  '30': '30 天',
+  all: '全部'
+}
+
+const formatClock = (date: Date): string =>
+  `${String(date.getHours()).padStart(2, '0')}:${String(date.getMinutes()).padStart(2, '0')}`
+
+const formatRangeDate = (date: Date, now: Date): string => {
+  const clock = formatClock(date)
+  if (date.getFullYear() === now.getFullYear()) {
+    return `${date.getMonth() + 1} 月 ${date.getDate()} 日 ${clock}`
+  }
+  return `${date.getFullYear()} 年 ${date.getMonth() + 1} 月 ${date.getDate()} 日 ${clock}`
+}
+
+const getChatHeaderRangeLabel = (range: string): string => {
+  const now = new Date()
+  const startOfToday = new Date(now.getFullYear(), now.getMonth(), now.getDate())
+  const endOfYesterday = new Date(startOfToday.getTime() - 60_000)
+
+  if (range === 'today') return `今天 00:00—现在`
+  if (range === 'yesterday') return `昨天 00:00—${formatClock(endOfYesterday)}`
+  if (range === '7') {
+    const start = new Date(Date.now() - 7 * 86400000)
+    return `${formatRangeDate(start, now)}—现在`
+  }
+  if (range === '30') {
+    const start = new Date(Date.now() - 30 * 86400000)
+    return `${formatRangeDate(start, now)}—现在`
+  }
+  if (range === 'all') return '全部记录'
+  return DATE_RANGE_LABELS[range] || '当前范围'
+}
 
 const withTimeout = async <T,>(promise: Promise<T>, label: string): Promise<T> => {
   let timer: number | undefined
@@ -44,7 +85,9 @@ const withTimeout = async <T,>(promise: Promise<T>, label: string): Promise<T> =
 
 const isInternalName = (value?: string): boolean => {
   const text = String(value || '').trim()
-  return !text || /^wxid_/i.test(text) || /@chatroom$/i.test(text) || /^[a-z0-9_-]{18,}$/i.test(text)
+  return (
+    !text || /^wxid_/i.test(text) || /@chatroom$/i.test(text) || /^[a-z0-9_-]{18,}$/i.test(text)
+  )
 }
 
 const SUMMARY_TYPE_OPTIONS: {
@@ -79,12 +122,15 @@ const ChatWindow: React.FC<ChatWindowProps> = ({
   messages,
   isLoadingMessages,
   contentFilter,
+  dateRange = 'today',
+  onContentFilterChange,
   onRefresh,
   onRefreshData
 }) => {
   const isGroupChat = Boolean(
     contact?.type === 'group' || contact?.m_nsUsrName?.endsWith('@chatroom')
   )
+  const messageListRef = useRef<HTMLDivElement>(null)
   const messagesEndRef = useRef<HTMLDivElement>(null)
   const [generatedImage, setGeneratedImage] = useState<string | null>(null)
   const [reportPaths, setReportPaths] = useState<{ htmlPath: string; pngPath: string } | null>(null)
@@ -107,6 +153,7 @@ const ChatWindow: React.FC<ChatWindowProps> = ({
   const [model, setModel] = useState(() => localStorage.getItem('ai_model') || 'deepseek-chat')
   const [summaryDateRange, setSummaryDateRange] = useState<SummaryDateRange>('today')
   const [summaryMessageTypes, setSummaryMessageTypes] = useState<SummaryMessageType[]>(['text'])
+  const [isAtLatest, setIsAtLatest] = useState(true)
 
   const handleSaveSettings = (): void => {
     if (!summaryMessageTypes.length) {
@@ -126,13 +173,20 @@ const ChatWindow: React.FC<ChatWindowProps> = ({
     )
   }
 
-  const scrollToBottom = (): void => {
+  const scrollToBottom = useCallback((): void => {
     messagesEndRef.current?.scrollIntoView({ behavior: 'auto' })
-  }
+    setIsAtLatest(true)
+  }, [])
+
+  const handleMessageListScroll = useCallback((event: React.UIEvent<HTMLDivElement>): void => {
+    const target = event.currentTarget
+    const distanceToBottom = target.scrollHeight - target.scrollTop - target.clientHeight
+    setIsAtLatest(distanceToBottom <= 24)
+  }, [])
 
   useEffect(() => {
     scrollToBottom()
-  }, [messages])
+  }, [messages, scrollToBottom])
 
   const openImagePreview = (imageUrl: string): void => {
     setPreviewImage(imageUrl)
@@ -203,7 +257,7 @@ const ChatWindow: React.FC<ChatWindowProps> = ({
     }
   }, [previewImage])
 
-  const handleExport = (days: number | 'all'): void => {
+  const handleExport = (days: ExportRange): void => {
     if (!messages.length) return
 
     let filtered = messages
@@ -360,150 +414,52 @@ const ChatWindow: React.FC<ChatWindowProps> = ({
     [filteredMessages]
   )
 
-  if (!contact) {
+  if (!contact) return <EmptyConversationState />
-    return (
+
-      <div className="chat-window">
+  const dateRangeLabel = getChatHeaderRangeLabel(dateRange)
-        <div className="empty-state">选择一条消息</div>
-      </div>
-    )
-  }
 
   return (
     <div className="chat-window">
-      <div className="chat-header">
+      <ChatHeader
-        <h2>{contact.m_nsNickName}</h2>
+        contact={contact}
-        <div className="window-controls"></div>
+        isGroupChat={isGroupChat}
-      </div>
+        dateRangeLabel={dateRangeLabel}
-
+        loadedCount={messages.length}
-      <div className="message-list wechat-message-list">
+        filteredCount={filteredMessages.length}
-        {isLoadingMessages && (
+        contentFilter={contentFilter || ''}
-          <div className="message-loading-pill">正在加载聊天记录...</div>
+        isAiLoading={isLoading}
-        )}
+        canExport={messages.length > 0}
-        {hiddenMessageCount > 0 && (
+        onContentFilterChange={onContentFilterChange || (() => undefined)}
-          <div className="wechat-system-message-row">
+        onRefresh={onRefresh}
-            <div className="wechat-system-message">
+        onRefreshData={onRefreshData}
-              已隐藏较早的 {hiddenMessageCount} 条消息，当前显示最新 {MAX_RENDERED_MESSAGES} 条
+        onExport={handleExport}
-            </div>
+        onOpenAiSettings={() => setShowSettingsModal(true)}
-          </div>
-        )}
-        {renderedMessages.map((msg) => {
-          const isMine = msg.from === 'assistant'
-          const isSystem = msg.from === 'system' || msg.type === '系统消息'
-          const displayName = isMine
-            ? '我'
-            : isGroupChat
-              ? msg.name || msg.from
-              : contact.m_nsNickName
-          const avatarSrc = isMine ? msg.img : msg.img || contact.avatar
-          const isVoice = msg.type === '语音'
-          const isImage = msg.type === '图片'
-          const isRichMedia = ['名片', '位置', '分享消息', '通话', '表情包', '系统消息'].includes(
-            msg.type
-          )
-
-          if (isSystem) {
-            return (
-              <div key={msg.id} className="wechat-system-message-row">
-                <div className="wechat-system-message">{msg.content}</div>
-                <div className="wechat-system-message-meta">{msg.datetime}</div>
-              </div>
-            )
-          }
-
-          return (
-            <div key={msg.id} className={`wechat-message-row ${isMine ? 'mine' : 'other'}`}>
-              {!isMine && showAvatar && (
-                <div className="message-avatar">
-                  {avatarSrc ? (
-                    <img src={avatarSrc} alt={displayName} referrerPolicy="no-referrer" />
-                  ) : (
-                    (displayName || '?').charAt(0)
-                  )}
-                </div>
-              )}
-              <div className="message-stack">
-                {!isMine && isGroupChat && <div className="message-sender-name">{displayName}</div>}
-                <div
-                  className={`message-bubble ${isVoice ? 'voice-bubble' : ''} ${isImage ? 'image-message-bubble' : ''}`}
-                >
-                  {isVoice && msg.sessionId ? (
-                    <VoicePlayer
-                      sessionId={msg.sessionId}
-                      localId={msg.localId || 0}
-                      createTime={msg.createTime || 0}
       />
-                  ) : isImage && msg.contentData && msg.contentData.type === 'image' ? (
+      <DataTrustBar messageCount={messages.length} />
-                    <ImageBubble
+      <MessageList
-                      imageMd5={msg.contentData.md5}
+        contact={contact}
-                      imageDatName={msg.contentData.datName}
+        messages={renderedMessages}
-                      sessionId={msg.sessionId}
+        hiddenMessageCount={hiddenMessageCount}
+        isLoadingMessages={isLoadingMessages}
+        isGroupChat={isGroupChat}
+        showAvatar={showAvatar}
+        listRef={messageListRef}
+        bottomRef={messagesEndRef}
+        onScroll={handleMessageListScroll}
         onImageClick={openImagePreview}
       />
-                  ) : isRichMedia && msg.contentData ? (
+      <ChatStatusBar
-                    <RichMessageBubble contentData={msg.contentData} />
+        count={renderedMessages.length}
-                  ) : (
+        showAvatar={showAvatar}
-                    <div className="message-text">{renderWechatEmojiText(msg.content)}</div>
+        isAtLatest={isAtLatest}
-                  )}
+        onShowAvatarChange={setShowAvatar}
-                </div>
+        onJumpToLatest={scrollToBottom}
-                <div className="message-meta">
-                  <span>{msg.datetime}</span>
-                  <span>{msg.type}</span>
-                </div>
-              </div>
-              {isMine && showAvatar && (
-                <div className="message-avatar mine-avatar">
-                  {avatarSrc ? <img src={avatarSrc} alt="我" referrerPolicy="no-referrer" /> : '我'}
-                </div>
-              )}
-            </div>
-          )
-        })}
-        <div ref={messagesEndRef} />
-      </div>
-
-      <div className="chat-toolbar">
-        <label
-          style={{ marginRight: '10px', display: 'flex', alignItems: 'center', cursor: 'pointer' }}
-        >
-          <input
-            type="checkbox"
-            checked={showAvatar}
-            onChange={(e) => setShowAvatar(e.target.checked)}
-            style={{ marginRight: '5px' }}
       />
-          显示头像
-        </label>
-        <button className="toolbar-btn" onClick={onRefresh}>
-          🔄 刷新聊天记录
-        </button>
-        <button className="toolbar-btn" onClick={onRefreshData}>
-          🔄 刷新数据
-        </button>
-        <button className="toolbar-btn" onClick={() => handleExport('all')}>
-          📤 导出全部
-        </button>
-        <button className="toolbar-btn" onClick={() => handleExport(0)}>
-          🕒 导出今日
-        </button>
-        <button className="toolbar-btn" onClick={() => handleExport(1)}>
-          📅 导出昨日
-        </button>
-        <button className="toolbar-btn" onClick={() => handleExport(7)}>
-          📅 导出近7天
-        </button>
-        <button className="toolbar-btn" onClick={() => handleExport(30)}>
-          📅 导出近30天
-        </button>
-        <button className="toolbar-btn" onClick={() => setShowSettingsModal(true)}>
-          🤖 AI总结群聊
-        </button>
-      </div>
 
       {/* 加载模态框 */}
       {isLoading && (
         <div className="modal-overlay">
           <div className="modal-content" style={{ textAlign: 'center', minWidth: '200px' }}>
-            <div style={{ fontSize: '40px', marginBottom: '20px' }}>🤖</div>
             <div style={{ fontSize: '16px', color: '#333' }}>正在生成群聊日报...</div>
             <div style={{ fontSize: '12px', color: '#999', marginTop: '10px' }}>
               正在分析记录、处理头像并生成 HTML 和长图
@@ -537,7 +493,7 @@ const ChatWindow: React.FC<ChatWindowProps> = ({
                   borderRadius: '4px'
                 }}
               >
-                📋 复制图片
+                复制图片
               </button>
               {reportPaths && (
                 <button

src/renderer/src/components/ImageBubble.tsx

@@ -110,7 +110,8 @@ export function ImageBubble({
   if (loading) {
     return (
       <div className="image-bubble image-loading" onClick={handleClick}>
-        <div className="image-loading-spinner">加载中...</div>
+        <div className="image-loading-skeleton" aria-hidden />
+        <div className="image-quality-badge">加载中</div>
       </div>
     )
   }
@@ -118,7 +119,8 @@ export function ImageBubble({
   if (error) {
     return (
       <div className="image-bubble image-error" onClick={loadImage}>
-        <div className="image-error-text">{error || '图片未加载'}</div>
+        <div className="image-error-text">{error || '图片未缓存'}</div>
+        <div className="image-quality-badge">加载失败</div>
       </div>
     )
   }
@@ -126,8 +128,8 @@ export function ImageBubble({
   if (!imageUrl) {
     return (
       <div ref={containerRef} className="image-bubble image-placeholder">
-        <div className="image-placeholder-icon">图</div>
+        <div className="image-loading-skeleton" aria-hidden />
-        <div className="image-placeholder-text">加载图片中...</div>
+        <div className="image-quality-badge">加载中</div>
       </div>
     )
   }
@@ -136,7 +138,7 @@ export function ImageBubble({
     <div className="image-bubble image-loaded" onClick={handleClick}>
       <img src={imageUrl} alt="图片" className="image-content" />
       {(upgrading || isThumbnail) && (
-        <div className="image-quality-badge">{upgrading ? '查找原图...' : '缩略图'}</div>
+        <div className="image-quality-badge">{upgrading ? '正在查找原图' : '缩略图'}</div>
       )}
       <div className="image-actions">
         <button className="image-action-btn" onClick={handleCopy} title="复制图片">

src/renderer/src/components/RichMessageBubble.tsx

@@ -54,7 +54,7 @@ function LocationBubble({
 
   return (
     <div className="location-message" onClick={hasCoords ? handleClick : undefined}>
-      <div className="location-icon">📍</div>
+      <div className="location-icon">位置</div>
       <div className="location-info">
         <div className="location-name">{locationText}</div>
         {label && poiname && label !== poiname && <div className="location-label">{label}</div>}
@@ -126,7 +126,7 @@ function VoipBubble({ data }: { data: Extract<ParsedContent, { type: 'voip' }> }
 
   return (
     <div className="voip-message">
-      <span className="voip-icon">{isVideo ? '📹' : '📞'}</span>
+      <span className="voip-icon">{isVideo ? '视频' : '通话'}</span>
       <span className="voip-status">
         {status}
         {duration ? ` ${formatDuration(duration)}` : ''}

src/renderer/src/components/Sidebar.tsx

@@ -1,163 +1,6 @@
-import React, { useState } from 'react'
+import React from 'react'
-import { Contact } from '../../../shared/types'
+import { ConversationSidebar, ConversationSidebarProps } from './conversation/ConversationSidebar'
 
-interface SelfInfo {
+export const Sidebar: React.FC<ConversationSidebarProps> = (props) => (
-  wxid: string
+  <ConversationSidebar {...props} />
-  nickname: string
+)
-  avatar?: string
-  accountRoot: string
-}
-
-interface SidebarProps {
-  contacts: Contact[]
-  selectedContact: Contact | null
-  onSelectContact: (contact: Contact) => void
-  onSearch: (keyword: string) => void
-  onContentFilter: (keyword: string) => void
-  width: number
-  dateRange: string
-  onDateRangeChange: (range: string) => void
-  selfInfo: SelfInfo | null
-  dbReady: boolean
-  onOpenSettings: () => void
-}
-
-export const Sidebar: React.FC<SidebarProps> = ({
-  contacts,
-  selectedContact,
-  onSelectContact,
-  onSearch,
-  onContentFilter,
-  width,
-  dateRange,
-  onDateRangeChange,
-  selfInfo,
-  dbReady,
-  onOpenSettings
-}) => {
-  const [searchTerm, setSearchTerm] = useState('')
-  const [contentFilter, setContentFilter] = useState('')
-  const [isGroupsExpanded, setIsGroupsExpanded] = useState(true)
-  const [isContactsExpanded, setIsContactsExpanded] = useState(true)
-
-  const handleSearchChange = (e: React.ChangeEvent<HTMLInputElement>): void => {
-    const term = e.target.value
-    setSearchTerm(term)
-    onSearch(term)
-  }
-
-  const handleContentFilterChange = (e: React.ChangeEvent<HTMLInputElement>): void => {
-    const term = e.target.value
-    setContentFilter(term)
-    onContentFilter(term)
-  }
-
-  const groups = contacts.filter((c) => c.type === 'group')
-  const users = contacts.filter((c) => c.type === 'user')
-
-  const renderContactItem = (contact: Contact): React.ReactElement => (
-    <div
-      key={contact.md5}
-      className={`contact-item ${selectedContact?.md5 === contact.md5 ? 'active' : ''}`}
-      onClick={() => onSelectContact(contact)}
-    >
-      <div className="contact-avatar">
-        {contact.avatar ? (
-          <img
-            src={contact.avatar}
-            alt={contact.m_nsNickName}
-            referrerPolicy="no-referrer"
-            loading="lazy"
-            decoding="async"
-          />
-        ) : (
-          (contact.m_nsNickName || contact.m_nsUsrName || '?').charAt(0)
-        )}
-      </div>
-      <div className="contact-info">
-        <div className="contact-name">{contact.m_nsNickName}</div>
-      </div>
-    </div>
-  )
-
-  return (
-    <div className="sidebar" style={{ width: width }}>
-      <div className="sidebar-header">
-        <input
-          type="text"
-          className="search-input"
-          placeholder="搜索联系人"
-          value={searchTerm}
-          onChange={handleSearchChange}
-          style={{ marginBottom: '8px' }}
-        />
-        <input
-          type="text"
-          className="search-input"
-          placeholder="过滤消息内容"
-          value={contentFilter}
-          onChange={handleContentFilterChange}
-        />
-        <div className="date-range-selector">
-          {[
-            { key: 'today', label: '当天' },
-            { key: 'yesterday', label: '昨日' },
-            { key: '7', label: '近7天' },
-            { key: '30', label: '近30天' },
-            { key: 'all', label: '所有' }
-          ].map((item) => (
-            <button
-              key={item.key}
-              className={`range-btn ${dateRange === item.key ? 'active' : ''}`}
-              onClick={() => onDateRangeChange(item.key)}
-              title={item.label}
-            >
-              {item.label}
-            </button>
-          ))}
-        </div>
-      </div>
-      <div className="contact-list">
-        {/* 群聊部分 */}
-        <div className="section-header" onClick={() => setIsGroupsExpanded(!isGroupsExpanded)}>
-          <span className="arrow">{isGroupsExpanded ? '▼' : '▶'}</span> 群聊 ({groups.length})
-        </div>
-        {isGroupsExpanded && groups.map(renderContactItem)}
-        {isGroupsExpanded && groups.length === 0 && <div className="section-empty">暂无群聊</div>}
-
-        {/* 联系人部分 */}
-        <div className="section-header" onClick={() => setIsContactsExpanded(!isContactsExpanded)}>
-          <span className="arrow">{isContactsExpanded ? '▼' : '▶'}</span> 联系人 ({users.length})
-        </div>
-        {isContactsExpanded && users.map(renderContactItem)}
-        {isContactsExpanded && users.length === 0 && (
-          <div className="section-empty">暂无联系人</div>
-        )}
-      </div>
-      <div className="sidebar-footer" onClick={onOpenSettings} title="设置">
-        <div className="sidebar-self-avatar">
-          {selfInfo?.avatar ? (
-            <img
-              src={selfInfo.avatar}
-              alt={selfInfo.nickname}
-              referrerPolicy="no-referrer"
-              loading="lazy"
-              decoding="async"
-            />
-          ) : (
-            ((selfInfo?.nickname || selfInfo?.wxid || '我').charAt(0))
-          )}
-        </div>
-        <div className="sidebar-self-info">
-          <div className="sidebar-self-nickname">
-            {dbReady && selfInfo ? selfInfo.nickname || selfInfo.wxid || '我' : '未连接'}
-          </div>
-          <div className="sidebar-self-wxid">
-            {dbReady && selfInfo ? selfInfo.wxid : '点击设置 →'}
-          </div>
-        </div>
-        <div className="sidebar-self-arrow" aria-hidden>⚙</div>
-      </div>
-    </div>
-  )
-}

src/renderer/src/components/VoicePlayer.tsx

@@ -176,7 +176,7 @@ export function VoicePlayer({
     return (
       <div className="voice-message voice-error" onClick={handlePlayPause}>
         <span className="voice-icon">▶</span>
-        <span className="voice-error-text">[语音]</span>
+        <span className="voice-error-text">当前版本暂不支持播放</span>
       </div>
     )
   }

src/renderer/src/components/account/AccountSummary.tsx

@@ -20,17 +20,13 @@ export function AccountSummary({
   compact = false,
   onClick
 }: AccountSummaryProps): React.ReactElement {
-  const displayName = dbReady && selfInfo ? selfInfo.nickname || selfInfo.wxid || '当前账号' : '未连接'
+  const displayName =
+    dbReady && selfInfo ? selfInfo.nickname || selfInfo.wxid || '当前账号' : '未连接'
   const subtitle = dbReady && selfInfo ? selfInfo.wxid : '打开设置'
+  const statusText = dbReady ? '数据库已连接' : '数据库未连接'
   const initial = (displayName || '?').charAt(0)
-
+  const title = `${displayName}\n${subtitle}`
-  return (
+  const avatar = (
-    <button
-      type="button"
-      className={`account-summary ${compact ? 'compact' : ''}`}
-      onClick={onClick}
-      title={compact ? `${displayName}\n${subtitle}` : undefined}
-    >
     <span className="account-summary-avatar">
       {selfInfo?.avatar ? (
         <img src={selfInfo.avatar} alt={displayName} referrerPolicy="no-referrer" />
@@ -39,12 +35,33 @@ export function AccountSummary({
       )}
       <span className={`account-summary-status ${dbReady ? 'ready' : ''}`} aria-hidden />
     </span>
-      {!compact && (
+  )
+
+  if (compact) {
+    return (
+      <button type="button" className="account-summary compact" onClick={onClick} title={title}>
+        {avatar}
+      </button>
+    )
+  }
+
+  return (
+    <div className="account-summary" title={title}>
+      {avatar}
       <span className="account-summary-text">
         <span className="account-summary-name">{displayName}</span>
         <span className="account-summary-meta">{subtitle}</span>
+        <span className="account-summary-state">
+          <span className={`account-summary-state-dot ${dbReady ? 'ready' : ''}`} aria-hidden />
+          {statusText}
         </span>
-      )}
+      </span>
+      <button type="button" className="account-summary-settings" onClick={onClick} title="设置">
+        <svg viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+          <path d="M12 8.5a3.5 3.5 0 1 0 0 7 3.5 3.5 0 0 0 0-7Z" />
+          <path d="M19.4 15a8.2 8.2 0 0 0 .1-1l2-1.5-2-3.5-2.4 1a7.5 7.5 0 0 0-1.7-1l-.3-2.5h-4l-.4 2.5a7.5 7.5 0 0 0-1.7 1l-2.3-1-2 3.5 2 1.5a8.2 8.2 0 0 0 0 2l-2 1.5 2 3.5 2.3-1a7.5 7.5 0 0 0 1.7 1l.4 2.5h4l.3-2.5a7.5 7.5 0 0 0 1.7-1l2.4 1 2-3.5-2.1-1.5Z" />
+        </svg>
       </button>
+    </div>
   )
 }

src/renderer/src/components/chat/ChatHeader.tsx

@@ -0,0 +1,136 @@
+import React, { useEffect, useRef, useState } from 'react'
+import { Contact } from '../../../../shared/types'
+import { ConversationContentSearch } from './ConversationContentSearch'
+import { ExportMenu, ExportRange } from './ExportMenu'
+import { AiIcon, MoreIcon, RefreshIcon, SearchIcon } from './icons'
+
+interface ChatHeaderProps {
+  contact: Contact
+  isGroupChat: boolean
+  dateRangeLabel: string
+  loadedCount: number
+  filteredCount: number
+  contentFilter: string
+  isAiLoading: boolean
+  canExport: boolean
+  onContentFilterChange: (value: string) => void
+  onRefresh?: () => void
+  onRefreshData?: () => void
+  onExport: (range: ExportRange) => void
+  onOpenAiSettings: () => void
+}
+
+export function ChatHeader({
+  contact,
+  isGroupChat,
+  dateRangeLabel,
+  loadedCount,
+  filteredCount,
+  contentFilter,
+  isAiLoading,
+  canExport,
+  onContentFilterChange,
+  onRefresh,
+  onRefreshData,
+  onExport,
+  onOpenAiSettings
+}: ChatHeaderProps): React.ReactElement {
+  const [searchOpen, setSearchOpen] = useState(Boolean(contentFilter))
+  const [moreOpen, setMoreOpen] = useState(false)
+  const moreRef = useRef<HTMLDivElement>(null)
+  const displayName = contact.m_nsNickName || contact.m_nsUsrName || '未命名会话'
+  const typeLabel = isGroupChat ? '群聊' : '联系人'
+  const visibleCount = contentFilter ? filteredCount : loadedCount
+
+  useEffect(() => {
+    if (!moreOpen) return
+    const handlePointerDown = (event: PointerEvent): void => {
+      if (!moreRef.current?.contains(event.target as Node)) setMoreOpen(false)
+    }
+    window.addEventListener('pointerdown', handlePointerDown)
+    return () => window.removeEventListener('pointerdown', handlePointerDown)
+  }, [moreOpen])
+
+  const handleCloseSearch = (): void => {
+    onContentFilterChange('')
+    setSearchOpen(false)
+  }
+
+  return (
+    <div className="chat-archive-header">
+      <div className="chat-title-block">
+        <div className="chat-title-avatar">
+          {contact.avatar ? (
+            <img src={contact.avatar} alt={displayName} referrerPolicy="no-referrer" />
+          ) : (
+            displayName.charAt(0)
+          )}
+        </div>
+        <div className="chat-title-text">
+          <h2>{displayName}</h2>
+          <div className="chat-title-meta">
+            <span>{typeLabel}</span>
+            <span>{dateRangeLabel}</span>
+            <span>{visibleCount} 条消息</span>
+          </div>
+        </div>
+      </div>
+      <div className="chat-header-actions">
+        {searchOpen ? (
+          <ConversationContentSearch
+            value={contentFilter}
+            resultCount={filteredCount}
+            onChange={onContentFilterChange}
+            onClose={handleCloseSearch}
+          />
+        ) : (
+          <button
+            type="button"
+            className="chat-icon-button"
+            onClick={() => setSearchOpen(true)}
+            title="搜索当前聊天"
+          >
+            <SearchIcon />
+          </button>
+        )}
+        <button type="button" className="chat-icon-button" onClick={onRefresh} title="刷新聊天记录">
+          <RefreshIcon />
+        </button>
+        <ExportMenu disabled={!canExport} onExport={onExport} />
+        <div className="chat-menu" ref={moreRef}>
+          <button
+            type="button"
+            className="chat-icon-button"
+            onClick={() => setMoreOpen((current) => !current)}
+            title="更多"
+          >
+            <MoreIcon />
+          </button>
+          {moreOpen && (
+            <div className="chat-dropdown-menu right">
+              <button
+                type="button"
+                onClick={() => {
+                  onRefreshData?.()
+                  setMoreOpen(false)
+                }}
+              >
+                刷新数据
+              </button>
+            </div>
+          )}
+        </div>
+        <button
+          type="button"
+          className="chat-ai-button"
+          onClick={onOpenAiSettings}
+          disabled={!isGroupChat || isAiLoading}
+          title={isGroupChat ? '生成 AI 日报' : 'AI 日报当前仅支持群聊'}
+        >
+          <AiIcon />
+          <span>{isAiLoading ? '生成中' : '生成 AI 日报'}</span>
+        </button>
+      </div>
+    </div>
+  )
+}

src/renderer/src/components/chat/ChatStatusBar.tsx

@@ -0,0 +1,39 @@
+import React from 'react'
+
+interface ChatStatusBarProps {
+  count: number
+  showAvatar: boolean
+  isAtLatest: boolean
+  onShowAvatarChange: (show: boolean) => void
+  onJumpToLatest: () => void
+}
+
+export function ChatStatusBar({
+  count,
+  showAvatar,
+  isAtLatest,
+  onShowAvatarChange,
+  onJumpToLatest
+}: ChatStatusBarProps): React.ReactElement {
+  const jumpDisabled = isAtLatest || count === 0
+
+  return (
+    <div className="chat-status-bar">
+      <div>已显示当前范围 {count} 条消息</div>
+      <div className="chat-status-actions">
+        <label className="chat-avatar-toggle">
+          <input
+            type="checkbox"
+            checked={showAvatar}
+            onChange={(event) => onShowAvatarChange(event.target.checked)}
+          />
+          <span>显示头像</span>
+        </label>
+        <span className="chat-status-separator" aria-hidden />
+        <button type="button" onClick={onJumpToLatest} disabled={jumpDisabled}>
+          {jumpDisabled ? '已是最新消息' : '跳转到最新消息'}
+        </button>
+      </div>
+    </div>
+  )
+}

src/renderer/src/components/chat/ConversationContentSearch.tsx

@@ -0,0 +1,37 @@
+import React from 'react'
+import { CloseIcon, SearchIcon } from './icons'
+
+interface ConversationContentSearchProps {
+  value: string
+  resultCount: number
+  onChange: (value: string) => void
+  onClose: () => void
+}
+
+export function ConversationContentSearch({
+  value,
+  resultCount,
+  onChange,
+  onClose
+}: ConversationContentSearchProps): React.ReactElement {
+  return (
+    <div className="chat-content-search">
+      <span className="chat-content-search-icon">
+        <SearchIcon />
+      </span>
+      <input
+        type="text"
+        value={value}
+        placeholder="搜索当前聊天内容"
+        onChange={(event) => onChange(event.target.value)}
+        autoFocus
+      />
+      <span className="chat-content-search-count">
+        {value ? `${resultCount} 条结果` : '输入关键词'}
+      </span>
+      <button type="button" className="chat-icon-button" onClick={onClose} title="关闭搜索">
+        <CloseIcon />
+      </button>
+    </div>
+  )
+}

src/renderer/src/components/chat/DataTrustBar.tsx

@@ -0,0 +1,25 @@
+import React from 'react'
+import { CheckCircleIcon, HomeIcon } from './icons'
+
+interface DataTrustBarProps {
+  messageCount: number
+}
+
+export function DataTrustBar({ messageCount }: DataTrustBarProps): React.ReactElement {
+  return (
+    <div className="data-trust-bar">
+      <div className="data-trust-left">
+        <HomeIcon />
+        <span>聊天记录仅在本机读取</span>
+      </div>
+      <div className="data-trust-right">
+        <span className="data-trust-item">
+          <CheckCircleIcon />
+          数据库已连接
+        </span>
+        <span className="data-trust-dot" aria-hidden />
+        <span>已加载 {messageCount} 条消息</span>
+      </div>
+    </div>
+  )
+}

src/renderer/src/components/chat/EmptyConversationState.tsx

@@ -0,0 +1,12 @@
+import React from 'react'
+
+export function EmptyConversationState(): React.ReactElement {
+  return (
+    <div className="chat-window empty">
+      <div className="empty-conversation-state">
+        <h2>选择一条消息</h2>
+        <p>从左侧选择群聊或联系人以浏览历史记录</p>
+      </div>
+    </div>
+  )
+}

src/renderer/src/components/chat/ExportMenu.tsx

@@ -0,0 +1,64 @@
+import React, { useEffect, useRef, useState } from 'react'
+import { ArrowDownIcon, ExportIcon } from './icons'
+
+export type ExportRange = number | 'all'
+
+interface ExportMenuProps {
+  disabled: boolean
+  onExport: (range: ExportRange) => void
+}
+
+const EXPORT_OPTIONS: { label: string; value: ExportRange }[] = [
+  { label: '导出当前范围', value: 'all' },
+  { label: '导出今天', value: 0 },
+  { label: '导出昨日', value: 1 },
+  { label: '导出近 7 天', value: 7 },
+  { label: '导出近 30 天', value: 30 },
+  { label: '导出全部', value: 'all' }
+]
+
+export function ExportMenu({ disabled, onExport }: ExportMenuProps): React.ReactElement {
+  const [open, setOpen] = useState(false)
+  const menuRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    if (!open) return
+    const handlePointerDown = (event: PointerEvent): void => {
+      if (!menuRef.current?.contains(event.target as Node)) setOpen(false)
+    }
+    window.addEventListener('pointerdown', handlePointerDown)
+    return () => window.removeEventListener('pointerdown', handlePointerDown)
+  }, [open])
+
+  return (
+    <div className="chat-menu" ref={menuRef}>
+      <button
+        type="button"
+        className="chat-tool-button"
+        disabled={disabled}
+        onClick={() => setOpen((current) => !current)}
+        title={disabled ? '没有可导出的消息' : '导出聊天记录'}
+      >
+        <ExportIcon />
+        <span>导出</span>
+        <ArrowDownIcon />
+      </button>
+      {open && (
+        <div className="chat-dropdown-menu">
+          {EXPORT_OPTIONS.map((option, index) => (
+            <button
+              key={`${option.label}-${index}`}
+              type="button"
+              onClick={() => {
+                onExport(option.value)
+                setOpen(false)
+              }}
+            >
+              {option.label}
+            </button>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}

src/renderer/src/components/chat/MessageBubble.tsx

@@ -0,0 +1,65 @@
+import React from 'react'
+import { Contact, Message } from '../../../../shared/types'
+import { ImageBubble } from '../ImageBubble'
+import { RichMessageBubble } from '../RichMessageBubble'
+import { VoicePlayer } from '../VoicePlayer'
+import { renderWechatEmojiText } from '../../utils/wechatEmojiText'
+import { formatMessageTime } from './messageGrouping'
+
+interface MessageBubbleProps {
+  message: Message
+  contact: Contact
+  isGroupChat: boolean
+  isMine: boolean
+  showAvatarSpace: boolean
+  onImageClick: (imageUrl: string) => void
+}
+
+const RICH_MESSAGE_TYPES = ['名片', '位置', '分享消息', '通话', '表情包', '系统消息']
+
+export function MessageBubble({
+  message,
+  contact,
+  isGroupChat,
+  isMine,
+  showAvatarSpace,
+  onImageClick
+}: MessageBubbleProps): React.ReactElement {
+  const isVoice = message.type === '语音'
+  const isImage = message.type === '图片'
+  const isRichMedia = RICH_MESSAGE_TYPES.includes(message.type)
+  const hoverTime = formatMessageTime(message)
+
+  return (
+    <div className={`message-bubble-wrap ${showAvatarSpace ? '' : 'is-followup'}`}>
+      <div
+        className={`message-bubble ${isVoice ? 'voice-bubble' : ''} ${
+          isImage ? 'image-message-bubble' : ''
+        }`}
+      >
+        {isVoice && message.sessionId ? (
+          <VoicePlayer
+            sessionId={message.sessionId}
+            localId={message.localId || 0}
+            createTime={message.createTime || 0}
+          />
+        ) : isImage && message.contentData && message.contentData.type === 'image' ? (
+          <ImageBubble
+            imageMd5={message.contentData.md5}
+            imageDatName={message.contentData.datName}
+            sessionId={message.sessionId}
+            onImageClick={onImageClick}
+          />
+        ) : isRichMedia && message.contentData ? (
+          <RichMessageBubble contentData={message.contentData} />
+        ) : (
+          <div className="message-text">{renderWechatEmojiText(message.content)}</div>
+        )}
+      </div>
+      <span className="message-hover-time">{hoverTime}</span>
+      {!isGroupChat && !isMine && contact.m_nsNickName && (
+        <span className="message-accessible-sender">{contact.m_nsNickName}</span>
+      )}
+    </div>
+  )
+}

src/renderer/src/components/chat/MessageGroup.tsx

@@ -0,0 +1,84 @@
+import React from 'react'
+import { Contact } from '../../../../shared/types'
+import { MessageBubble } from './MessageBubble'
+import { MessageGroupModel } from './messageGrouping'
+
+interface MessageGroupProps {
+  group: MessageGroupModel
+  contact: Contact
+  isGroupChat: boolean
+  showAvatar: boolean
+  onImageClick: (imageUrl: string) => void
+}
+
+export function MessageGroup({
+  group,
+  contact,
+  isGroupChat,
+  showAvatar,
+  onImageClick
+}: MessageGroupProps): React.ReactElement {
+  const firstMessage = group.messages[0]
+
+  if (group.isSystem) {
+    return (
+      <>
+        {group.timeLabel && <div className="chat-time-separator">{group.timeLabel}</div>}
+        {group.messages.map((message) => (
+          <div key={message.id} className="wechat-system-message-row">
+            <div className="wechat-system-message">{message.content}</div>
+          </div>
+        ))}
+      </>
+    )
+  }
+
+  const isMine = group.isMine
+  const displayName = isMine
+    ? '我'
+    : isGroupChat
+      ? firstMessage.name || firstMessage.from
+      : contact.m_nsNickName
+  const avatarSrc = isMine ? firstMessage.img : firstMessage.img || contact.avatar
+  const shouldShowAvatar = showAvatar
+
+  return (
+    <>
+      {group.timeLabel && <div className="chat-time-separator">{group.timeLabel}</div>}
+      <div className={`wechat-message-row ${isMine ? 'mine' : 'other'} grouped`}>
+        {!isMine && shouldShowAvatar && (
+          <div className="message-avatar">
+            {avatarSrc ? (
+              <img src={avatarSrc} alt={displayName} referrerPolicy="no-referrer" />
+            ) : (
+              (displayName || '?').charAt(0)
+            )}
+          </div>
+        )}
+        {!isMine && !shouldShowAvatar && <div className="message-avatar-spacer" aria-hidden />}
+        <div className="message-stack">
+          {!isMine && isGroupChat && shouldShowAvatar && (
+            <div className="message-sender-name">{displayName}</div>
+          )}
+          {group.messages.map((message, index) => (
+            <MessageBubble
+              key={message.id}
+              message={message}
+              contact={contact}
+              isGroupChat={isGroupChat}
+              isMine={isMine}
+              showAvatarSpace={index === 0}
+              onImageClick={onImageClick}
+            />
+          ))}
+        </div>
+        {isMine && shouldShowAvatar && (
+          <div className="message-avatar mine-avatar">
+            {avatarSrc ? <img src={avatarSrc} alt="我" referrerPolicy="no-referrer" /> : '我'}
+          </div>
+        )}
+        {isMine && !shouldShowAvatar && <div className="message-avatar-spacer" aria-hidden />}
+      </div>
+    </>
+  )
+}

src/renderer/src/components/chat/MessageList.tsx

@@ -0,0 +1,56 @@
+import React from 'react'
+import { Contact, Message } from '../../../../shared/types'
+import { MessageGroup } from './MessageGroup'
+import { buildMessageGroups } from './messageGrouping'
+
+interface MessageListProps {
+  contact: Contact
+  messages: Message[]
+  hiddenMessageCount: number
+  isLoadingMessages?: boolean
+  isGroupChat: boolean
+  showAvatar: boolean
+  listRef: React.RefObject<HTMLDivElement | null>
+  bottomRef: React.RefObject<HTMLDivElement | null>
+  onScroll: (event: React.UIEvent<HTMLDivElement>) => void
+  onImageClick: (imageUrl: string) => void
+}
+
+export function MessageList({
+  contact,
+  messages,
+  hiddenMessageCount,
+  isLoadingMessages,
+  isGroupChat,
+  showAvatar,
+  listRef,
+  bottomRef,
+  onScroll,
+  onImageClick
+}: MessageListProps): React.ReactElement {
+  const groups = React.useMemo(() => buildMessageGroups(messages), [messages])
+
+  return (
+    <div className="message-list wechat-message-list" ref={listRef} onScroll={onScroll}>
+      {isLoadingMessages && <div className="message-loading-pill">正在加载聊天记录...</div>}
+      {hiddenMessageCount > 0 && (
+        <div className="wechat-system-message-row">
+          <div className="wechat-system-message">
+            已隐藏较早的 {hiddenMessageCount} 条消息，当前显示最新 {messages.length} 条
+          </div>
+        </div>
+      )}
+      {groups.map((group) => (
+        <MessageGroup
+          key={group.id}
+          group={group}
+          contact={contact}
+          isGroupChat={isGroupChat}
+          showAvatar={showAvatar}
+          onImageClick={onImageClick}
+        />
+      ))}
+      <div ref={bottomRef} />
+    </div>
+  )
+}

src/renderer/src/components/chat/icons.tsx

@@ -0,0 +1,89 @@
+import React from 'react'
+
+interface IconProps {
+  className?: string
+}
+
+export function SearchIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <circle cx="11" cy="11" r="6.5" />
+      <path d="m16 16 4 4" />
+    </svg>
+  )
+}
+
+export function RefreshIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <path d="M20 12a8 8 0 0 1-13.7 5.7" />
+      <path d="M4 12A8 8 0 0 1 17.7 6.3" />
+      <path d="M17.5 3.5v3h-3" />
+      <path d="M6.5 20.5v-3h3" />
+    </svg>
+  )
+}
+
+export function ExportIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <path d="M12 3v11" />
+      <path d="m8 10 4 4 4-4" />
+      <path d="M5 17v2a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2v-2" />
+    </svg>
+  )
+}
+
+export function MoreIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <circle cx="5" cy="12" r="1.4" />
+      <circle cx="12" cy="12" r="1.4" />
+      <circle cx="19" cy="12" r="1.4" />
+    </svg>
+  )
+}
+
+export function AiIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <path d="M12 3l1.5 5 5 1.5-5 1.5-1.5 5-1.5-5-5-1.5 5-1.5L12 3Z" />
+      <path d="M18 15l.8 2.4 2.2.6-2.2.7L18 22l-.8-2.3-2.2-.7 2.2-.6L18 15Z" />
+    </svg>
+  )
+}
+
+export function CloseIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <path d="M6 6l12 12" />
+      <path d="M18 6 6 18" />
+    </svg>
+  )
+}
+
+export function ArrowDownIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <path d="m6 9 6 6 6-6" />
+    </svg>
+  )
+}
+
+export function CheckCircleIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <circle cx="12" cy="12" r="8" />
+      <path d="m8.5 12.2 2.2 2.2 4.8-5" />
+    </svg>
+  )
+}
+
+export function HomeIcon({ className }: IconProps): React.ReactElement {
+  return (
+    <svg className={className} viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <path d="M4 11.5 12 5l8 6.5" />
+      <path d="M6.5 10.5V19h11v-8.5" />
+    </svg>
+  )
+}

src/renderer/src/components/chat/messageGrouping.ts

@@ -0,0 +1,93 @@
+import { Message } from '../../../../shared/types'
+
+const GROUP_INTERVAL_SECONDS = 5 * 60
+const TIME_SEPARATOR_INTERVAL_SECONDS = 10 * 60
+
+export interface MessageGroupModel {
+  id: string
+  messages: Message[]
+  isSystem: boolean
+  isMine: boolean
+  timeLabel?: string
+}
+
+const getMessageTime = (message: Message): number | null => {
+  if (typeof message.createTime === 'number' && message.createTime > 0) return message.createTime
+  const parsed = Date.parse(message.datetime)
+  if (Number.isNaN(parsed)) return null
+  return Math.floor(parsed / 1000)
+}
+
+const getSenderKey = (message: Message): string =>
+  String(message.senderId || message.name || message.from || '').trim()
+
+const formatClock = (date: Date): string =>
+  `${String(date.getHours()).padStart(2, '0')}:${String(date.getMinutes()).padStart(2, '0')}`
+
+export const isSystemMessage = (message: Message): boolean =>
+  message.from === 'system' || message.type === '系统消息'
+
+export const isMineMessage = (message: Message): boolean => message.from === 'assistant'
+
+export const formatMessageTime = (message: Message): string => {
+  const timestamp = getMessageTime(message)
+  if (!timestamp) return message.datetime
+  const date = new Date(timestamp * 1000)
+  const now = new Date()
+  const startOfToday = new Date(now.getFullYear(), now.getMonth(), now.getDate()).getTime()
+  const startOfMessageDay = new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime()
+  const dayDiff = Math.round((startOfToday - startOfMessageDay) / 86400000)
+  const clock = formatClock(date)
+
+  if (dayDiff === 0) return `今天 ${clock}`
+  if (dayDiff === 1) return `昨天 ${clock}`
+  if (date.getFullYear() === now.getFullYear()) {
+    return `${date.getMonth() + 1} 月 ${date.getDate()} 日 ${clock}`
+  }
+  return `${date.getFullYear()} 年 ${date.getMonth() + 1} 月 ${date.getDate()} 日 ${clock}`
+}
+
+export const buildMessageGroups = (messages: Message[]): MessageGroupModel[] => {
+  const groups: MessageGroupModel[] = []
+  let previousGroupStartTime: number | null = null
+
+  messages.forEach((message) => {
+    const isSystem = isSystemMessage(message)
+    const isMine = isMineMessage(message)
+    const timestamp = getMessageTime(message)
+    const previousGroup = groups[groups.length - 1]
+    const previousMessage = previousGroup?.messages[previousGroup.messages.length - 1]
+    const previousTimestamp = previousMessage ? getMessageTime(previousMessage) : null
+    const canJoinPrevious =
+      previousGroup &&
+      !isSystem &&
+      !previousGroup.isSystem &&
+      previousGroup.isMine === isMine &&
+      getSenderKey(previousMessage) === getSenderKey(message) &&
+      timestamp !== null &&
+      previousTimestamp !== null &&
+      timestamp - previousTimestamp >= 0 &&
+      timestamp - previousTimestamp <= GROUP_INTERVAL_SECONDS
+
+    if (canJoinPrevious) {
+      previousGroup.messages.push(message)
+      return
+    }
+
+    const needsTimeLabel =
+      timestamp !== null &&
+      (previousGroupStartTime === null ||
+        Math.abs(timestamp - previousGroupStartTime) >= TIME_SEPARATOR_INTERVAL_SECONDS)
+    const group: MessageGroupModel = {
+      id: message.id || `${groups.length}-${message.datetime}`,
+      messages: [message],
+      isSystem,
+      isMine,
+      timeLabel: needsTimeLabel ? formatMessageTime(message) : undefined
+    }
+    groups.push(group)
+    if (timestamp !== null && needsTimeLabel) previousGroupStartTime = timestamp
+  })
+
+  return groups
+}

src/renderer/src/components/conversation/ConversationItem.tsx

@@ -0,0 +1,46 @@
+import React from 'react'
+import { Contact } from '../../../../shared/types'
+
+interface ConversationItemProps {
+  contact: Contact
+  active: boolean
+  onSelect: (contact: Contact) => void
+}
+
+export function ConversationItem({
+  contact,
+  active,
+  onSelect
+}: ConversationItemProps): React.ReactElement {
+  const nickname = contact.m_nsNickName?.trim()
+  const wxid = contact.m_nsUsrName
+  const displayName = nickname || wxid || '未命名会话'
+  const initial = (displayName || wxid || '?').charAt(0)
+
+  return (
+    <button
+      type="button"
+      className={`conversation-item ${active ? 'active' : ''}`}
+      onClick={() => onSelect(contact)}
+      title={wxid && wxid !== displayName ? wxid : displayName}
+    >
+      <span className="conversation-item-active-mark" aria-hidden />
+      <span className="conversation-item-avatar">
+        {contact.avatar ? (
+          <img
+            src={contact.avatar}
+            alt={displayName}
+            referrerPolicy="no-referrer"
+            loading="lazy"
+            decoding="async"
+          />
+        ) : (
+          initial
+        )}
+      </span>
+      <span className="conversation-item-body">
+        <span className="conversation-item-name">{displayName}</span>
+      </span>
+    </button>
+  )
+}

src/renderer/src/components/conversation/ConversationSearch.tsx

@@ -0,0 +1,34 @@
+import React from 'react'
+
+interface ConversationSearchProps {
+  value: string
+  onChange: (value: string) => void
+}
+
+function SearchIcon(): React.ReactElement {
+  return (
+    <svg viewBox="0 0 24 24" aria-hidden="true" focusable="false">
+      <circle cx="11" cy="11" r="6.5" />
+      <path d="m16 16 4 4" />
+    </svg>
+  )
+}
+
+export function ConversationSearch({
+  value,
+  onChange
+}: ConversationSearchProps): React.ReactElement {
+  return (
+    <label className="conversation-search">
+      <span className="conversation-search-icon">
+        <SearchIcon />
+      </span>
+      <input
+        type="text"
+        value={value}
+        placeholder="搜索群聊、联系人或 wxid"
+        onChange={(event) => onChange(event.target.value)}
+      />
+    </label>
+  )
+}

src/renderer/src/components/conversation/ConversationSection.tsx

@@ -0,0 +1,60 @@
+import React from 'react'
+import { Contact } from '../../../../shared/types'
+import { ConversationItem } from './ConversationItem'
+
+interface ConversationSectionProps {
+  title: string
+  contacts: Contact[]
+  expanded: boolean
+  selectedContact: Contact | null
+  emptyText: string
+  onToggle: () => void
+  onSelectContact: (contact: Contact) => void
+}
+
+function ChevronIcon({ expanded }: { expanded: boolean }): React.ReactElement {
+  return (
+    <svg viewBox="0 0 16 16" aria-hidden="true" focusable="false">
+      <path d={expanded ? 'M4 6l4 4 4-4' : 'M6 4l4 4-4 4'} />
+    </svg>
+  )
+}
+
+export function ConversationSection({
+  title,
+  contacts,
+  expanded,
+  selectedContact,
+  emptyText,
+  onToggle,
+  onSelectContact
+}: ConversationSectionProps): React.ReactElement {
+  return (
+    <section className="conversation-section">
+      <button type="button" className="conversation-section-header" onClick={onToggle}>
+        <span className="conversation-section-chevron">
+          <ChevronIcon expanded={expanded} />
+        </span>
+        <span className="conversation-section-title">
+          {title}（{contacts.length}）
+        </span>
+      </button>
+      {expanded && (
+        <div className="conversation-section-list">
+          {contacts.length > 0 ? (
+            contacts.map((contact) => (
+              <ConversationItem
+                key={contact.md5}
+                contact={contact}
+                active={selectedContact?.md5 === contact.md5}
+                onSelect={onSelectContact}
+              />
+            ))
+          ) : (
+            <div className="conversation-section-empty">{emptyText}</div>
+          )}
+        </div>
+      )}
+    </section>
+  )
+}

src/renderer/src/components/conversation/ConversationSidebar.tsx

@@ -0,0 +1,85 @@
+import React, { useState } from 'react'
+import { Contact } from '../../../../shared/types'
+import { AccountSummary } from '../account/AccountSummary'
+import { ConversationSection } from './ConversationSection'
+import { ConversationSidebarHeader } from './ConversationSidebarHeader'
+
+interface SelfInfo {
+  wxid: string
+  nickname: string
+  avatar?: string
+  accountRoot: string
+}
+
+export interface ConversationSidebarProps {
+  contacts: Contact[]
+  selectedContact: Contact | null
+  onSelectContact: (contact: Contact) => void
+  onSearch: (keyword: string) => void
+  onContentFilter: (keyword: string) => void
+  width: number
+  dateRange: string
+  onDateRangeChange: (range: string) => void
+  selfInfo: SelfInfo | null
+  dbReady: boolean
+  onOpenSettings: () => void
+}
+
+export function ConversationSidebar({
+  contacts,
+  selectedContact,
+  onSelectContact,
+  onSearch,
+  width,
+  dateRange,
+  onDateRangeChange,
+  selfInfo,
+  dbReady,
+  onOpenSettings
+}: ConversationSidebarProps): React.ReactElement {
+  const [searchTerm, setSearchTerm] = useState('')
+  const [expandedSection, setExpandedSection] = useState<'groups' | 'contacts'>('groups')
+
+  const groups = contacts.filter((contact) => contact.type === 'group')
+  const users = contacts.filter((contact) => contact.type === 'user')
+
+  const handleSearchChange = (term: string): void => {
+    setSearchTerm(term)
+    onSearch(term)
+  }
+
+  return (
+    <aside className="conversation-sidebar" style={{ width }}>
+      <ConversationSidebarHeader
+        totalCount={contacts.length}
+        searchValue={searchTerm}
+        dateRange={dateRange}
+        onSearchChange={handleSearchChange}
+        onDateRangeChange={onDateRangeChange}
+      />
+      <div className="conversation-list" aria-label="会话列表">
+        <ConversationSection
+          title="群聊"
+          contacts={groups}
+          expanded={expandedSection === 'groups'}
+          selectedContact={selectedContact}
+          emptyText="暂无群聊"
+          onToggle={() => setExpandedSection('groups')}
+          onSelectContact={onSelectContact}
+        />
+        <ConversationSection
+          title="联系人"
+          contacts={users}
+          expanded={expandedSection === 'contacts'}
+          selectedContact={selectedContact}
+          emptyText="暂无联系人"
+          onToggle={() => setExpandedSection('contacts')}
+          onSelectContact={onSelectContact}
+        />
+      </div>
+      <div className="conversation-sidebar-account">
+        <AccountSummary selfInfo={selfInfo} dbReady={dbReady} onClick={onOpenSettings} />
+      </div>
+    </aside>
+  )
+}

src/renderer/src/components/conversation/ConversationSidebarHeader.tsx

@@ -0,0 +1,30 @@
+import React from 'react'
+import { ConversationSearch } from './ConversationSearch'
+import { DateRangeSelector } from './DateRangeSelector'
+
+interface ConversationSidebarHeaderProps {
+  totalCount: number
+  searchValue: string
+  dateRange: string
+  onSearchChange: (value: string) => void
+  onDateRangeChange: (range: string) => void
+}
+
+export function ConversationSidebarHeader({
+  totalCount,
+  searchValue,
+  dateRange,
+  onSearchChange,
+  onDateRangeChange
+}: ConversationSidebarHeaderProps): React.ReactElement {
+  return (
+    <div className="conversation-sidebar-header">
+      <div className="conversation-sidebar-title-row">
+        <h2>聊天档案</h2>
+        <span>{totalCount} 个会话</span>
+      </div>
+      <ConversationSearch value={searchValue} onChange={onSearchChange} />
+      <DateRangeSelector value={dateRange} onChange={onDateRangeChange} />
+    </div>
+  )
+}

src/renderer/src/components/conversation/DateRangeSelector.tsx

@@ -0,0 +1,31 @@
+import React from 'react'
+
+interface DateRangeSelectorProps {
+  value: string
+  onChange: (range: string) => void
+}
+
+const DATE_RANGE_OPTIONS = [
+  { key: 'today', label: '今天' },
+  { key: 'yesterday', label: '昨日' },
+  { key: '7', label: '7 天' },
+  { key: '30', label: '30 天' },
+  { key: 'all', label: '全部' }
+]
+
+export function DateRangeSelector({ value, onChange }: DateRangeSelectorProps): React.ReactElement {
+  return (
+    <div className="conversation-date-range" aria-label="时间范围">
+      {DATE_RANGE_OPTIONS.map((item) => (
+        <button
+          key={item.key}
+          type="button"
+          className={`conversation-date-range-button ${value === item.key ? 'active' : ''}`}
+          onClick={() => onChange(item.key)}
+        >
+          {item.label}
+        </button>
+      ))}
+    </div>
+  )
+}