修复 #820；支持企业用户会话显示；优化聊天页面性能

Merge pull request #823 from Jasonzhu1207/main
fix(perf): prevent memory growth in chat and export flows
2026-04-24 07:26:48 +00:00 · 2026-04-23 23:41:20 +08:00 · 2026-04-23 18:41:04 +08:00 · 2026-04-22 23:51:18 +08:00 · 2026-04-22 23:30:28 +08:00 · 2026-04-22 23:02:17 +08:00
27 changed files with 3147 additions and 2719 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -76,3 +76,4 @@ wechat-research-site
 .codex
 weflow-web-offical
 /Wedecrypt
+/scripts/syncwcdb.py
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -375,7 +375,34 @@ let isAppQuitting = false
 let shutdownPromise: Promise<void> | null = null
 let tray: Tray | null = null
 let isClosePromptVisible = false
-const chatHistoryPayloadStore = new Map<string, { sessionId: string; title?: string; recordList: any[] }>()
+
+interface ChatHistoryPayloadEntry {
+  sessionId: string
+  title?: string
+  recordList: any[]
+  createdAt: number
+  lastAccessedAt: number
+}
+
+const chatHistoryPayloadStore = new Map<string, ChatHistoryPayloadEntry>()
+const chatHistoryPayloadTtlMs = 10 * 60 * 1000
+const chatHistoryPayloadMaxEntries = 20
+
+const pruneChatHistoryPayloadStore = (): void => {
+  const now = Date.now()
+
+  for (const [payloadId, payload] of chatHistoryPayloadStore.entries()) {
+    if (now - payload.createdAt > chatHistoryPayloadTtlMs) {
+      chatHistoryPayloadStore.delete(payloadId)
+    }
+  }
+
+  while (chatHistoryPayloadStore.size > chatHistoryPayloadMaxEntries) {
+    const oldestPayloadId = chatHistoryPayloadStore.keys().next().value as string | undefined
+    if (!oldestPayloadId) break
+    chatHistoryPayloadStore.delete(oldestPayloadId)
+  }
+}

 type WindowCloseBehavior = 'ask' | 'tray' | 'quit'

@@ -659,6 +686,62 @@ const setupCustomTitleBarWindow = (win: BrowserWindow): void => {
  win.webContents.on('did-finish-load', emitMaximizeState)
 }

+let notificationNavigateHandlerRegistered = false
+const focusMainWindowAndNavigate = (sessionId: string): void => {
+  const targetWindow = mainWindow
+  if (!targetWindow || targetWindow.isDestroyed()) return
+  if (targetWindow.isMinimized()) targetWindow.restore()
+  targetWindow.show()
+  targetWindow.focus()
+  targetWindow.webContents.send('navigate-to-session', sessionId)
+}
+
+const ensureNotificationNavigateHandlerRegistered = (): void => {
+  if (notificationNavigateHandlerRegistered) return
+  notificationNavigateHandlerRegistered = true
+  ipcMain.on('notification-clicked', (_event, sessionId) => {
+    focusMainWindowAndNavigate(String(sessionId || ''))
+  })
+  setNotificationNavigateHandler((sessionId: string) => {
+    focusMainWindowAndNavigate(String(sessionId || ''))
+  })
+}
+
+let wechatRequestHeaderInterceptorRegistered = false
+const ensureWeChatRequestHeaderInterceptor = (): void => {
+  if (wechatRequestHeaderInterceptorRegistered) return
+  wechatRequestHeaderInterceptorRegistered = true
+
+  session.defaultSession.webRequest.onBeforeSendHeaders(
+    {
+      urls: [
+        '*://*.qpic.cn/*',
+        '*://*.qlogo.cn/*',
+        '*://*.wechat.com/*',
+        '*://*.weixin.qq.com/*',
+        '*://*.wx.qq.com/*'
+      ]
+    },
+    (details, callback) => {
+      details.requestHeaders['User-Agent'] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 MicroMessenger/7.0.20.1781(0x6700143B) WindowsWechat(0x63090719) XWEB/8351"
+      details.requestHeaders['Accept'] = "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8"
+      details.requestHeaders['Accept-Encoding'] = "gzip, deflate, br"
+      details.requestHeaders['Accept-Language'] = "zh-CN,zh;q=0.9"
+      details.requestHeaders['Connection'] = "keep-alive"
+      details.requestHeaders['Range'] = "bytes=0-"
+
+      let host = ''
+      try {
+        host = new URL(details.url).hostname.toLowerCase()
+      } catch {}
+      const isWxQQ = host === 'wx.qq.com' || host.endsWith('.wx.qq.com')
+      details.requestHeaders['Referer'] = isWxQQ ? 'https://wx.qq.com/' : 'https://servicewechat.com/'
+
+      callback({ cancel: false, requestHeaders: details.requestHeaders })
+    }
+  )
+}
+
 const getWindowCloseBehavior = (): WindowCloseBehavior => {
  const behavior = configService?.get('windowCloseBehavior')
  return behavior === 'tray' || behavior === 'quit' ? behavior : 'ask'
@@ -734,44 +817,6 @@ function createWindow(options: { autoShow?: boolean } = {}) {
    win.loadFile(join(__dirname, '../dist/index.html'))
  }

-  // Handle notification click navigation
-  ipcMain.on('notification-clicked', (_, sessionId) => {
-    if (win.isMinimized()) win.restore()
-    win.show()
-    win.focus()
-    win.webContents.send('navigate-to-session', sessionId)
-  })
-
-  // 设置用于D-Bus通知的Linux通知导航处理程序
-  setNotificationNavigateHandler((sessionId: string) => {
-    if (win.isMinimized()) win.restore()
-    win.show()
-    win.focus()
-    win.webContents.send('navigate-to-session', sessionId)
-  })
-
-  // 拦截请求，修改 Referer 和 User-Agent 以通过微信 CDN 鉴权
-  session.defaultSession.webRequest.onBeforeSendHeaders(
-    {
-      urls: [
-        '*://*.qpic.cn/*',
-        '*://*.qlogo.cn/*',
-        '*://*.wechat.com/*',
-        '*://*.weixin.qq.com/*'
-      ]
-    },
-    (details, callback) => {
-      details.requestHeaders['User-Agent'] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 MicroMessenger/7.0.20.1781(0x6700143B) WindowsWechat(0x63090719) XWEB/8351"
-      details.requestHeaders['Accept'] = "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8"
-      details.requestHeaders['Accept-Encoding'] = "gzip, deflate, br"
-      details.requestHeaders['Accept-Language'] = "zh-CN,zh;q=0.9"
-      details.requestHeaders['Referer'] = "https://servicewechat.com/"
-      details.requestHeaders['Connection'] = "keep-alive"
-      details.requestHeaders['Range'] = "bytes=0-"
-      callback({ cancel: false, requestHeaders: details.requestHeaders })
-    }
-  )
-
  // 忽略微信 CDN 域名的证书错误（部分节点证书配置不正确）
  win.webContents.on('certificate-error', (event, url, _error, _cert, callback) => {
    const trusted = ['.qq.com', '.qpic.cn', '.weixin.qq.com', '.wechat.com']
@@ -1179,7 +1224,11 @@ function createChatHistoryWindow(sessionId: string, messageId: number) {
 }

 function createChatHistoryPayloadWindow(payloadId: string) {
-  return createChatHistoryRouteWindow(`/chat-history-inline/${payloadId}`)
+  const win = createChatHistoryRouteWindow(`/chat-history-inline/${payloadId}`)
+  win.on('closed', () => {
+    chatHistoryPayloadStore.delete(payloadId)
+  })
+  return win
 }

 function createChatHistoryRouteWindow(route: string) {
@@ -1612,6 +1661,7 @@ const runLegacySnsCacheMigration = async (
 // 注册 IPC 处理器
 function registerIpcHandlers() {
  registerNotificationHandlers()
+  ensureNotificationNavigateHandlerRegistered()
  bizService.registerHandlers()
  // 配置相关
  ipcMain.handle('config:get', async (_, key: string) => {
@@ -1989,19 +2039,38 @@ function registerIpcHandlers() {

  ipcMain.handle('window:openChatHistoryPayloadWindow', (_, payload: { sessionId: string; title?: string; recordList: any[] }) => {
    const payloadId = randomUUID()
+    pruneChatHistoryPayloadStore()
+    const now = Date.now()
    chatHistoryPayloadStore.set(payloadId, {
      sessionId: String(payload?.sessionId || '').trim(),
      title: String(payload?.title || '').trim() || '聊天记录',
-      recordList: Array.isArray(payload?.recordList) ? payload.recordList : []
+      recordList: Array.isArray(payload?.recordList) ? payload.recordList : [],
+      createdAt: now,
+      lastAccessedAt: now
    })
+    pruneChatHistoryPayloadStore()
    createChatHistoryPayloadWindow(payloadId)
    return true
  })

  ipcMain.handle('window:getChatHistoryPayload', (_, payloadId: string) => {
-    const payload = chatHistoryPayloadStore.get(String(payloadId || '').trim())
+    pruneChatHistoryPayloadStore()
+    const normalizedPayloadId = String(payloadId || '').trim()
+    const payload = chatHistoryPayloadStore.get(normalizedPayloadId)
    if (!payload) return { success: false, error: '聊天记录载荷不存在或已失效' }
-    return { success: true, payload }
+    const nextPayload: ChatHistoryPayloadEntry = {
+      ...payload,
+      lastAccessedAt: Date.now()
+    }
+    chatHistoryPayloadStore.set(normalizedPayloadId, nextPayload)
+    return {
+      success: true,
+      payload: {
+        sessionId: nextPayload.sessionId,
+        title: nextPayload.title,
+        recordList: nextPayload.recordList
+      }
+    }
  })

  // 打开会话聊天窗口（同会话仅保留一个窗口并聚焦）
@@ -2390,6 +2459,8 @@ function registerIpcHandlers() {
    allowStaleCache?: boolean
    preferAccurateSpecialTypes?: boolean
    cacheOnly?: boolean
+    beginTimestamp?: number
+    endTimestamp?: number
  }) => {
    return chatService.getExportSessionStats(sessionIds, options)
  })
@@ -3052,6 +3123,7 @@ function registerIpcHandlers() {
  ipcMain.handle('cache:clearImages', async () => {
    const imageResult = await imageDecryptService.clearCache()
    const emojiResult = chatService.clearCaches({ includeMessages: false, includeContacts: false, includeEmojis: true })
+    snsService.clearMemoryCache()
    const errors = [imageResult, emojiResult]
      .filter((result) => !result.success)
      .map((result) => result.error)
@@ -3068,6 +3140,7 @@ function registerIpcHandlers() {
      imageDecryptService.clearCache()
    ])
    const chatResult = chatService.clearCaches()
+    snsService.clearMemoryCache()
    const errors = [analyticsResult, imageResult, chatResult]
      .filter((result) => !result.success)
      .map((result) => result.error)
@@ -3790,6 +3863,7 @@ app.whenReady().then(async () => {

  // 创建主窗口（不显示，由启动流程统一控制）
  updateSplashProgress(70, '正在准备主窗口...')
+  ensureWeChatRequestHeaderInterceptor()
  mainWindow = createWindow({ autoShow: false })

  let iconName = 'icon.ico';
@@ -3849,17 +3923,6 @@ app.whenReady().then(async () => {
    console.warn('[Tray] Failed to create tray icon:', e)
  }

-  // 配置网络服务
-  session.defaultSession.webRequest.onBeforeSendHeaders(
-    {
-      urls: ['*://*.qpic.cn/*', '*://*.wx.qq.com/*']
-    },
-    (details, callback) => {
-      details.requestHeaders['Referer'] = 'https://wx.qq.com/'
-      callback({ requestHeaders: details.requestHeaders })
-    }
-  )
-
  // 等待主窗口加载完成（真正耗时阶段，进度条末端呼吸光点）
  updateSplashProgress(70, '正在准备主窗口...', true)
  await new Promise<void>((resolve) => {
@@ -3934,5 +3997,3 @@ app.on('window-all-closed', () => {
 })


-
-
--- a/electron/preload.ts
+++ b/electron/preload.ts
@@ -219,6 +219,8 @@ contextBridge.exposeInMainWorld('electronAPI', {
        allowStaleCache?: boolean
        preferAccurateSpecialTypes?: boolean
        cacheOnly?: boolean
+        beginTimestamp?: number
+        endTimestamp?: number
      }
    ) => ipcRenderer.invoke('chat:getExportSessionStats', sessionIds, options),
    getGroupMyMessageCountHint: (chatroomId: string) =>
@@ -565,4 +567,3 @@ contextBridge.exposeInMainWorld('electronAPI', {
    validateWeiboUid: (uid: string) => ipcRenderer.invoke('social:validateWeiboUid', uid)
  }
 })
-
--- a/electron/services/analyticsService.ts
+++ b/electron/services/analyticsService.ts
@@ -103,8 +103,10 @@ class AnalyticsService {
    if (username === 'filehelper') return false
    if (username.startsWith('gh_')) return false

+    if (username.toLowerCase() === 'weixin') return false
+
    const excludeList = [
-      'weixin', 'qqmail', 'fmessage', 'medianote', 'floatbottle',
+      'qqmail', 'fmessage', 'medianote', 'floatbottle',
      'newsapp', 'brandsessionholder', 'brandservicesessionholder',
      'notifymessage', 'opencustomerservicemsg', 'notification_messages',
      'userexperience_alarm', 'helper_folders', 'placeholder_foldgroup',
--- a/electron/services/annualReportService.ts
+++ b/electron/services/annualReportService.ts
@@ -170,7 +170,7 @@ class AnnualReportService {
    const rows = sessionResult.sessions as Record<string, any>[]

    const excludeList = [
-      'weixin', 'qqmail', 'fmessage', 'medianote', 'floatbottle',
+      'qqmail', 'fmessage', 'medianote', 'floatbottle',
      'newsapp', 'brandsessionholder', 'brandservicesessionholder',
      'notifymessage', 'opencustomerservicemsg', 'notification_messages',
      'userexperience_alarm', 'helper_folders', 'placeholder_foldgroup',
@@ -185,6 +185,7 @@ class AnnualReportService {
        if (username === 'filehelper') return false
        if (username.startsWith('gh_')) return false
        if (username.toLowerCase() === cleanedWxid.toLowerCase()) return false
+        if (username.toLowerCase() === 'weixin') return false

        for (const prefix of excludeList) {
          if (username.startsWith(prefix) || username === prefix) return false
--- a/electron/services/chatService.ts
+++ b/electron/services/chatService.ts
--- a/electron/services/exportService.ts
+++ b/electron/services/exportService.ts
--- a/electron/services/httpService.ts
+++ b/electron/services/httpService.ts
@@ -496,11 +496,20 @@ class HttpService {
    const contentType = mimeTypes[ext] || 'application/octet-stream'

    try {
-      const fileBuffer = fs.readFileSync(fullPath)
+      const stat = fs.statSync(fullPath)
      res.setHeader('Content-Type', contentType)
-      res.setHeader('Content-Length', fileBuffer.length)
+      res.setHeader('Content-Length', stat.size)
      res.writeHead(200)
-      res.end(fileBuffer)
+
+      const stream = fs.createReadStream(fullPath)
+      stream.on('error', () => {
+        if (!res.headersSent) {
+          this.sendError(res, 500, 'Failed to read media file')
+        } else {
+          try { res.destroy() } catch {}
+        }
+      })
+      stream.pipe(res)
    } catch (e) {
      this.sendError(res, 500, 'Failed to read media file')
    }
@@ -516,27 +525,29 @@ class HttpService {
    limit: number,
    startTime: number,
    endTime: number,
-    ascending: boolean
+    ascending: boolean,
+    useLiteMapping: boolean = true
  ): Promise<{ success: boolean; messages?: Message[]; hasMore?: boolean; error?: string }> {
    try {
-      // 使用固定 batch 大小（与 limit 相同或最多 500）来减少循环次数
-      const batchSize = Math.min(limit, 500)
+      // 深分页时放大 batch，避免 offset 很大时出现大量小批次循环。
+      const batchSize = Math.min(2000, Math.max(500, limit))
      const beginTimestamp = startTime > 10000000000 ? Math.floor(startTime / 1000) : startTime
      const endTimestamp = endTime > 10000000000 ? Math.floor(endTime / 1000) : endTime

-      const cursorResult = await wcdbService.openMessageCursor(talker, batchSize, ascending, beginTimestamp, endTimestamp)
+      const cursorResult = await wcdbService.openMessageCursorLite(talker, batchSize, ascending, beginTimestamp, endTimestamp)
      if (!cursorResult.success || !cursorResult.cursor) {
        return { success: false, error: cursorResult.error || '打开消息游标失败' }
      }

      const cursor = cursorResult.cursor
      try {
-        const allRows: Record<string, any>[] = []
+        const collectedRows: Record<string, any>[] = []
        let hasMore = true
        let skipped = 0
+        let reachedLimit = false

        // 循环获取消息，处理 offset 跳过 + limit 累积
-        while (allRows.length < limit && hasMore) {
+        while (collectedRows.length < limit && hasMore) {
          const batch = await wcdbService.fetchMessageBatch(cursor)
          if (!batch.success || !batch.rows || batch.rows.length === 0) {
            hasMore = false
@@ -557,12 +568,20 @@ class HttpService {
            skipped = offset
          }

-          allRows.push(...rows)
+          const remainingCapacity = limit - collectedRows.length
+          if (rows.length > remainingCapacity) {
+            collectedRows.push(...rows.slice(0, remainingCapacity))
+            reachedLimit = true
+            break
          }

-        const trimmedRows = allRows.slice(0, limit)
-        const finalHasMore = hasMore || allRows.length > limit
-        const messages = chatService.mapRowsToMessagesForApi(trimmedRows)
+          collectedRows.push(...rows)
+        }
+
+        const finalHasMore = hasMore || reachedLimit
+        const messages = useLiteMapping
+          ? chatService.mapRowsToMessagesLiteForApi(collectedRows)
+          : chatService.mapRowsToMessagesForApi(collectedRows)
        await this.backfillMissingSenderUsernames(talker, messages)
        return { success: true, messages, hasMore: finalHasMore }
      } finally {
@@ -590,9 +609,35 @@ class HttpService {
    if (targets.length === 0) return

    const myWxid = (this.configService.get('myWxid') || '').trim()
+    const MAX_DETAIL_BACKFILL = 120
+    if (targets.length > MAX_DETAIL_BACKFILL) {
      for (const msg of targets) {
+        if (!msg.senderUsername && msg.isSend === 1 && myWxid) {
+          msg.senderUsername = myWxid
+        }
+      }
+      return
+    }
+
+    const queue = [...targets]
+    const workerCount = Math.max(1, Math.min(6, queue.length))
+    const state = {
+      attempted: 0,
+      hydrated: 0,
+      consecutiveMiss: 0
+    }
+    const MAX_DETAIL_LOOKUPS = 80
+    const MAX_CONSECUTIVE_MISS = 36
+    const runWorker = async (): Promise<void> => {
+      while (queue.length > 0) {
+        if (state.attempted >= MAX_DETAIL_LOOKUPS) break
+        if (state.consecutiveMiss >= MAX_CONSECUTIVE_MISS && state.hydrated <= 0) break
+        const msg = queue.shift()
+        if (!msg) break
+
        const localId = Number(msg.localId || 0)
        if (Number.isFinite(localId) && localId > 0) {
+          state.attempted += 1
          try {
            const detail = await wcdbService.getMessageById(talker, localId)
            if (detail.success && detail.message) {
@@ -606,9 +651,18 @@ class HttpService {
              if (!msg.rawContent && hydrated?.rawContent) {
                msg.rawContent = hydrated.rawContent
              }
+              if (msg.senderUsername) {
+                state.hydrated += 1
+                state.consecutiveMiss = 0
+              } else {
+                state.consecutiveMiss += 1
+              }
+            } else {
+              state.consecutiveMiss += 1
            }
          } catch (error) {
            console.warn('[HttpService] backfill sender failed:', error)
+            state.consecutiveMiss += 1
          }
        }

@@ -618,6 +672,9 @@ class HttpService {
      }
    }

+    await Promise.all(Array.from({ length: workerCount }, () => runWorker()))
+  }
+
  private parseBooleanParam(url: URL, keys: string[], defaultValue: boolean = false): boolean {
    for (const key of keys) {
      const raw = url.searchParams.get(key)
@@ -663,7 +720,7 @@ class HttpService {
    const talker = (url.searchParams.get('talker') || '').trim()
    const limit = this.parseIntParam(url.searchParams.get('limit'), 100, 1, 10000)
    const offset = this.parseIntParam(url.searchParams.get('offset'), 0, 0, Number.MAX_SAFE_INTEGER)
-    const keyword = (url.searchParams.get('keyword') || '').trim().toLowerCase()
+    const keyword = (url.searchParams.get('keyword') || '').trim()
    const startParam = url.searchParams.get('start')
    const endParam = url.searchParams.get('end')
    const chatlab = this.parseBooleanParam(url, ['chatlab'], false)
@@ -683,26 +740,41 @@ class HttpService {

    const startTime = this.parseTimeParam(startParam)
    const endTime = this.parseTimeParam(endParam, true)
-    const queryOffset = keyword ? 0 : offset
-    const queryLimit = keyword ? 10000 : limit
+    let messages: Message[] = []
+    let hasMore = false

-    const result = await this.fetchMessagesBatch(talker, queryOffset, queryLimit, startTime, endTime, false)
+    if (keyword) {
+      const searchLimit = Math.max(1, limit) + 1
+      const searchResult = await chatService.searchMessages(
+        keyword,
+        talker,
+        searchLimit,
+        offset,
+        startTime,
+        endTime
+      )
+      if (!searchResult.success || !searchResult.messages) {
+        this.sendError(res, 500, searchResult.error || 'Failed to search messages')
+        return
+      }
+      hasMore = searchResult.messages.length > limit
+      messages = hasMore ? searchResult.messages.slice(0, limit) : searchResult.messages
+    } else {
+      const result = await this.fetchMessagesBatch(
+        talker,
+        offset,
+        limit,
+        startTime,
+        endTime,
+        false,
+        !mediaOptions.enabled
+      )
      if (!result.success || !result.messages) {
        this.sendError(res, 500, result.error || 'Failed to get messages')
        return
      }
-
-    let messages = result.messages
-    let hasMore = result.hasMore === true
-
-    if (keyword) {
-      const filtered = messages.filter((msg) => {
-        const content = (msg.parsedContent || msg.rawContent || '').toLowerCase()
-        return content.includes(keyword)
-      })
-      const endIndex = offset + limit
-      hasMore = filtered.length > endIndex
-      messages = filtered.slice(offset, endIndex)
+      messages = result.messages
+      hasMore = result.hasMore === true
    }

    const mediaMap = mediaOptions.enabled
@@ -812,7 +884,7 @@ class HttpService {
    const endTime = endParam ? this.parseTimeParam(endParam, true) : 0

    try {
-      const result = await this.fetchMessagesBatch(sessionId, offset, limit, startTime, endTime, true)
+      const result = await this.fetchMessagesBatch(sessionId, offset, limit, startTime, endTime, true, true)
      if (!result.success || !result.messages) {
        this.sendError(res, 500, result.error || 'Failed to get messages')
        return
--- a/electron/services/messageCacheService.ts
+++ b/electron/services/messageCacheService.ts
@@ -12,6 +12,7 @@ export class MessageCacheService {
  private readonly cacheFilePath: string
  private cache: Record<string, SessionMessageCacheEntry> = {}
  private readonly sessionLimit = 150
+  private readonly maxSessionEntries = 48

  constructor(cacheBasePath?: string) {
    const basePath = cacheBasePath && cacheBasePath.trim().length > 0
@@ -36,6 +37,7 @@ export class MessageCacheService {
      const parsed = JSON.parse(raw)
      if (parsed && typeof parsed === 'object') {
        this.cache = parsed
+        this.pruneSessionEntries()
      }
    } catch (error) {
      console.error('MessageCacheService: 载入缓存失败', error)
@@ -43,6 +45,19 @@ export class MessageCacheService {
    }
  }

+  private pruneSessionEntries(): void {
+    const entries = Object.entries(this.cache || {})
+    if (entries.length <= this.maxSessionEntries) return
+
+    entries.sort((left, right) => {
+      const leftAt = Number(left[1]?.updatedAt || 0)
+      const rightAt = Number(right[1]?.updatedAt || 0)
+      return rightAt - leftAt
+    })
+
+    this.cache = Object.fromEntries(entries.slice(0, this.maxSessionEntries))
+  }
+
  get(sessionId: string): SessionMessageCacheEntry | undefined {
    return this.cache[sessionId]
  }
@@ -56,6 +71,7 @@ export class MessageCacheService {
      updatedAt: Date.now(),
      messages: trimmed
    }
+    this.pruneSessionEntries()
    this.persist()
  }

--- a/electron/services/snsService.ts
+++ b/electron/services/snsService.ts
@@ -324,6 +324,9 @@ class SnsService {
    private configService: ConfigService
    private contactCache: ContactCacheService
    private imageCache = new Map<string, string>()
+    private imageCacheMeta = new Map<string, number>()
+    private readonly imageCacheTtlMs = 15 * 60 * 1000
+    private readonly imageCacheMaxEntries = 120
    private exportStatsCache: { totalPosts: number; totalFriends: number; myPosts: number | null; updatedAt: number } | null = null
    private userPostCountsCache: { counts: Record<string, number>; updatedAt: number } | null = null
    private readonly exportStatsCacheTtlMs = 5 * 60 * 1000
@@ -336,6 +339,38 @@ class SnsService {
        this.contactCache = new ContactCacheService(this.configService.get('cachePath') as string)
    }

+    clearMemoryCache(): void {
+        this.imageCache.clear()
+        this.imageCacheMeta.clear()
+    }
+
+    private pruneImageCache(now: number = Date.now()): void {
+        for (const [key, updatedAt] of this.imageCacheMeta.entries()) {
+            if (now - updatedAt > this.imageCacheTtlMs) {
+                this.imageCacheMeta.delete(key)
+                this.imageCache.delete(key)
+            }
+        }
+
+        while (this.imageCache.size > this.imageCacheMaxEntries) {
+            const oldestKey = this.imageCache.keys().next().value as string | undefined
+            if (!oldestKey) break
+            this.imageCache.delete(oldestKey)
+            this.imageCacheMeta.delete(oldestKey)
+        }
+    }
+
+    private rememberImageCache(cacheKey: string, dataUrl: string): void {
+        if (!cacheKey || !dataUrl) return
+        const now = Date.now()
+        if (this.imageCache.has(cacheKey)) {
+            this.imageCache.delete(cacheKey)
+        }
+        this.imageCache.set(cacheKey, dataUrl)
+        this.imageCacheMeta.set(cacheKey, now)
+        this.pruneImageCache(now)
+    }
+
    private toOptionalString(value: unknown): string | undefined {
        if (typeof value !== 'string') return undefined
        const trimmed = value.trim()
@@ -1239,20 +1274,27 @@ class SnsService {
        if (!url) return { success: false, error: 'url 不能为空' }
        const cacheKey = `${url}|${key ?? ''}`

-        if (this.imageCache.has(cacheKey)) {
        const cachedDataUrl = this.imageCache.get(cacheKey) || ''
+        if (cachedDataUrl) {
+            const cachedAt = this.imageCacheMeta.get(cacheKey) || 0
+            if (cachedAt > 0 && Date.now() - cachedAt <= this.imageCacheTtlMs) {
                const base64Part = cachedDataUrl.split(',')[1] || ''
                if (base64Part) {
                    try {
                        const cachedBuf = Buffer.from(base64Part, 'base64')
                        if (detectImageMime(cachedBuf, '').startsWith('image/')) {
+                            this.imageCache.delete(cacheKey)
+                            this.imageCache.set(cacheKey, cachedDataUrl)
+                            this.imageCacheMeta.set(cacheKey, Date.now())
                            return { success: true, dataUrl: cachedDataUrl }
                        }
                    } catch {
                        // ignore and fall through to refetch
                    }
                }
+            }
            this.imageCache.delete(cacheKey)
+            this.imageCacheMeta.delete(cacheKey)
        }

        const result = await this.fetchAndDecryptImage(url, key)
@@ -1269,7 +1311,7 @@ class SnsService {
                    return { success: false, error: '无效图片数据（可能密钥不匹配或缓存损坏）' }
                }
                const dataUrl = `data:${result.contentType};base64,${result.data.toString('base64')}`
-                this.imageCache.set(cacheKey, dataUrl)
+                this.rememberImageCache(cacheKey, dataUrl)
                return { success: true, dataUrl }
            }
        }
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
        "jszip": "^3.10.1",
        "koffi": "^2.9.0",
        "lucide-react": "^1.7.0",
-        "react": "^19.2.5",
+        "react": "^19.2.3",
        "react-dom": "^19.2.3",
        "react-markdown": "^10.1.0",
        "react-router-dom": "^7.14.0",
@@ -8464,9 +8464,9 @@
      }
    },
    "node_modules/react": {
-      "version": "19.2.5",
-      "resolved": "https://registry.npmjs.org/react/-/react-19.2.5.tgz",
-      "integrity": "sha512-llUJLzz1zTUBrskt2pwZgLq59AemifIftw4aB7JxOqf1HY2FDaGDxgwpAPVzHU1kdWabH7FauP4i1oEeer2WCA==",
+      "version": "19.2.4",
+      "resolved": "https://registry.npmjs.org/react/-/react-19.2.4.tgz",
+      "integrity": "sha512-9nfp2hYpCwOjAN+8TZFGhtWEwgvWHXqESH8qT89AT/lWklpLON22Lc8pEtnpsZz7VmawabSU0gCjnj8aC0euHQ==",
      "license": "MIT",
      "engines": {
        "node": ">=0.10.0"
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
    "jszip": "^3.10.1",
    "koffi": "^2.9.0",
    "lucide-react": "^1.7.0",
-    "react": "^19.2.5",
+    "react": "^19.2.3",
    "react-dom": "^19.2.3",
    "react-markdown": "^10.1.0",
    "react-router-dom": "^7.14.0",
--- a/resources/wcdb/linux/x64/libwcdb_api.so
+++ b/resources/wcdb/linux/x64/libwcdb_api.so
--- a/resources/wcdb/macos/universal/libwcdb_api.dylib
+++ b/resources/wcdb/macos/universal/libwcdb_api.dylib
--- a/resources/wcdb/win32/arm64/wcdb_api.dll
+++ b/resources/wcdb/win32/arm64/wcdb_api.dll
--- a/resources/wcdb/win32/x64/wcdb_api.dll
+++ b/resources/wcdb/win32/x64/wcdb_api.dll
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -81,6 +81,7 @@ function App() {
  const isStandaloneChatWindow = location.pathname === '/chat-window'
  const isNotificationWindow = location.pathname === '/notification-window'
  const isAnnualReportWindow = location.pathname === '/annual-report/view'
+  const isDualReportWindow = location.pathname === '/dual-report/view'
  const isSettingsRoute = location.pathname === '/settings'
  const settingsRouteState = location.state as { backgroundLocation?: Location; initialTab?: unknown } | null
  const routeLocation = isSettingsRoute
@@ -128,7 +129,7 @@ function App() {
    const body = document.body
    const appRoot = document.getElementById('app')

-    if (isOnboardingWindow || isNotificationWindow || isAnnualReportWindow) {
+    if (isOnboardingWindow || isNotificationWindow || isAnnualReportWindow || isDualReportWindow) {
      root.style.background = 'transparent'
      body.style.background = 'transparent'
      body.style.overflow = 'hidden'
@@ -145,7 +146,7 @@ function App() {
        appRoot.style.overflow = ''
      }
    }
-  }, [isOnboardingWindow, isNotificationWindow, isAnnualReportWindow])
+  }, [isOnboardingWindow, isNotificationWindow, isAnnualReportWindow, isDualReportWindow])

  // 应用主题
  useEffect(() => {
@@ -166,7 +167,7 @@ function App() {
    }
    mq.addEventListener('change', handler)
    return () => mq.removeEventListener('change', handler)
-  }, [currentTheme, themeMode, isOnboardingWindow, isNotificationWindow, isAnnualReportWindow])
+  }, [currentTheme, themeMode, isOnboardingWindow, isNotificationWindow, isAnnualReportWindow, isDualReportWindow])

  // 读取已保存的主题设置
  useEffect(() => {
@@ -517,6 +518,11 @@ function App() {
    return <AnnualReportWindow />
  }

+  // 独立双人报告全屏窗口
+  if (isDualReportWindow) {
+    return <DualReportWindow />
+  }
+
  // 主窗口 - 完整布局
  const handleCloseSettings = () => {
    const backgroundLocation = settingsRouteState?.backgroundLocation ?? settingsBackgroundRef.current
--- a/src/components/Avatar.tsx
+++ b/src/components/Avatar.tsx
@@ -5,6 +5,21 @@ import './Avatar.scss'

 // 全局缓存已成功加载过的头像 URL，用于控制后续是否显示动画
 const loadedAvatarCache = new Set<string>()
+const MAX_LOADED_AVATAR_CACHE_SIZE = 3000
+
+const rememberLoadedAvatar = (src: string): void => {
+    if (!src) return
+    if (loadedAvatarCache.has(src)) {
+        loadedAvatarCache.delete(src)
+    }
+    loadedAvatarCache.add(src)
+
+    while (loadedAvatarCache.size > MAX_LOADED_AVATAR_CACHE_SIZE) {
+        const oldest = loadedAvatarCache.values().next().value as string | undefined
+        if (!oldest) break
+        loadedAvatarCache.delete(oldest)
+    }
+}

 interface AvatarProps {
    src?: string
@@ -123,7 +138,7 @@ export const Avatar = React.memo(function Avatar({
                        onLoad={() => {
                            if (src) {
                                avatarLoadQueue.clearFailed(src)
-                                loadedAvatarCache.add(src)
+                                rememberLoadedAvatar(src)
                            }
                            setImageLoaded(true)
                            setImageError(false)
--- a/src/components/GlobalSessionMonitor.tsx
+++ b/src/components/GlobalSessionMonitor.tsx
@@ -22,7 +22,7 @@ export function GlobalSessionMonitor() {
    // 去重辅助函数：获取消息 key
    const getMessageKey = (msg: Message) => {
        if (msg.messageKey) return msg.messageKey
-        return `fallback:${msg.serverId || 0}:${msg.createTime}:${msg.sortSeq || 0}:${msg.localId || 0}:${msg.senderUsername || ''}:${msg.localType || 0}`
+        return `fallback:${msg._db_path || ''}:${msg.serverId || 0}:${msg.createTime}:${msg.sortSeq || 0}:${msg.localId || 0}:${msg.senderUsername || ''}:${msg.localType || 0}`
    }

    // 处理数据库变更
--- a/src/pages/AnnualReportWindow.scss
+++ b/src/pages/AnnualReportWindow.scss
@@ -299,6 +299,12 @@
    opacity: 0.05;
    box-shadow: none;
    filter: blur(80px);
+    animation: coreBreathing 6s ease-in-out infinite;
+  }
+
+  @keyframes coreBreathing {
+    0%, 100% { opacity: 0.03; transform: translate(-50%, -50%) scale(0.95); }
+    50% { opacity: 0.06; transform: translate(-50%, -50%) scale(1.05); }
  }

  /* S9: LEXICON (大气) */
@@ -643,199 +649,160 @@
  }

  #scene-8 {
-    align-items: flex-start;
-    justify-content: flex-start;
-    padding: 0 6vw;
+    align-items: center;
+    justify-content: center;
+    padding: 0;
+    overflow: hidden;
  }

-  #scene-8 .s8-layout {
+  /* V2 Background: Cinematic Aura */
+  #scene-8 .s8-bg-layer {
    position: absolute;
-    top: 18vh;
-    left: 50%;
-    transform: translateX(-50%);
-    width: min(1240px, 86vw);
-    display: grid;
-    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
-    column-gap: clamp(34px, 4.8vw, 84px);
-    align-items: start;
+    inset: -10%;
+    z-index: 1;
+    opacity: 0;
+    transition: opacity 2s 0.2s var(--ease-out);
+    filter: blur(120px) contrast(1.1) brightness(0.6);
+    pointer-events: none;
+    
+    .bg-avatar {
+      width: 100%;
+      height: 100%;
+      object-fit: cover;
+      transform: scale(1.2);
+    }
  }

-  #scene-8 .s8-left {
+  .scene.active #scene-8 .s8-bg-layer {
+    opacity: 0.18;
+  }
+
+  #scene-8 .s8-floating-layout {
+    position: relative;
+    width: 100vw;
+    height: 100vh;
+    z-index: 2;
+    display: grid;
+    grid-template-columns: repeat(12, 1fr);
+    grid-template-rows: repeat(12, 1fr);
+    padding: 10vh 8vw;
+  }
+
+  /* The Central Pivot: Name & Meta */
+  #scene-8 .s8-hero-unit {
+    grid-column: 2 / 8;
+    grid-row: 4 / 7;
    display: flex;
    flex-direction: column;
-    gap: clamp(2.5vh, 3.2vh, 4vh);
-    padding-top: clamp(8vh, 9vh, 11vh);
-  }
+    justify-content: center;
    
-  #scene-8 .s8-name-wrap,
-  #scene-8 .s8-summary-wrap,
-  #scene-8 .s8-quote-wrap,
-  #scene-8 .s8-letter-wrap {
-    display: block;
-    width: 100%;
-  }
-
-  #scene-8 .s8-name {
-    font-size: clamp(3.2rem, 7.4vw, 5.6rem);
-    color: rgba(var(--c-gold-rgb), 0.88);
+    .s8-name {
+      font-size: clamp(4.5rem, 10vw, 8.5rem);
+      font-weight: 700;
+      color: var(--c-text-bright);
      letter-spacing: 0.08em;
-    line-height: 1.05;
+      line-height: 1;
+      margin-bottom: 2vh;
+      background: linear-gradient(135deg, var(--c-gold-strong), var(--c-text-bright), var(--c-gold-strong));
+      background-size: 200% auto;
+      -webkit-background-clip: text;
+      -webkit-text-fill-color: transparent;
+      animation: shine 8s linear infinite;
+      text-shadow: 0 0 40px rgba(var(--c-gold-rgb), 0.2);
    }

-  #scene-8 .s8-summary {
-    max-width: 34ch;
-    font-size: clamp(1.06rem, 1.35vw, 1.35rem);
-    color: var(--c-text-soft);
-    line-height: 1.95;
-    letter-spacing: 0.02em;
-  }
-
-  #scene-8 .s8-summary-count {
-    margin: 0 8px;
-    font-size: clamp(1.35rem, 2vw, 1.75rem);
+    .s8-meta {
+      font-family: 'SpaceMonoLocal';
+      font-size: clamp(0.7rem, 0.85vw, 0.9rem);
      color: var(--c-gold-strong);
-    white-space: nowrap;
-  }
+      letter-spacing: 0.4em;
+      text-transform: uppercase;
+      display: flex;
+      align-items: center;
+      gap: 1.5vw;
      
-  #scene-8 .s8-quote {
-    max-width: 32ch;
-    font-size: clamp(0.98rem, 1.12vw, 1.1rem);
-    color: var(--c-text-muted);
-    line-height: 1.9;
-  }
-
-  #scene-8 .s8-letter-wrap {
-    margin-top: clamp(3vh, 4vh, 5.5vh);
-  }
-
-  #scene-8 .s8-letter {
-    position: relative;
-    padding: clamp(24px, 3.2vh, 38px) clamp(20px, 2.6vw, 34px) clamp(24px, 3.2vh, 38px) clamp(30px, 3.2vw, 44px);
-    border-radius: 18px;
-    border: 1px solid rgba(var(--c-gold-rgb), 0.34);
-    background: linear-gradient(135deg, rgba(var(--c-gold-rgb), 0.16), rgba(var(--c-gold-rgb), 0.04));
-    font-size: clamp(0.95rem, 1.05vw, 1.08rem);
-    line-height: 2;
-    color: var(--c-text-soft);
-    text-align: left;
-    text-shadow: 0 4px 16px rgba(0, 0, 0, 0.22);
-  }
-
-  #scene-8 .s8-letter::before {
+      &::after {
        content: '';
+        flex: 1;
+        height: 1px;
+        background: linear-gradient(to right, rgba(var(--c-gold-rgb), 0.6), transparent);
+      }
+    }
+  }
+
+  /* Fragmented Storytelling */
+  #scene-8 .s8-fragments {
    position: absolute;
-    top: 20px;
-    left: 14px;
-    width: 2px;
-    height: calc(100% - 40px);
-    border-radius: 2px;
-    background: linear-gradient(to bottom, rgba(var(--c-gold-rgb), 0.7), rgba(var(--c-gold-rgb), 0.08));
+    inset: 0;
+    pointer-events: none;
+  }
+
+  #scene-8 .fragment {
+    position: absolute;
+    max-width: 24ch;
+    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
+    line-height: 2.1;
+    color: var(--c-text-muted);
+    font-weight: 300;
+    
+    &.f1 {
+      top: 25vh;
+      right: 12vw;
+      text-align: right;
+      color: var(--c-text-soft);
+      font-style: italic;
+    }
+
+    &.f2 {
+      bottom: 20vh;
+      left: 15vw;
+      max-width: 38ch;
+    }
+
+    &.f3 {
+      bottom: 12vh;
+      right: 10vw;
+      text-align: right;
+      opacity: 0.6;
+      font-size: 0.85rem;
+      letter-spacing: 0.05em;
+    }
+  }
+
+  @keyframes shine {
+    to { background-position: 200% center; }
  }

  #scene-8 .s8-empty-wrap {
-    display: block;
-    width: min(760px, 78vw);
-    margin-top: 24vh;
+    grid-column: 4 / 10;
+    grid-row: 5 / 8;
    text-align: center;
-  }
-
-  #scene-8 .s8-empty-text {
-    color: var(--c-text);
-    line-height: 2;
-  }
-
-  @media (max-width: 1280px) {
-    #scene-8 .s8-layout {
-      width: min(1120px, 88vw);
-      grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
-      column-gap: clamp(28px, 4vw, 56px);
-    }
-
-    #scene-8 .s8-left {
-      padding-top: clamp(6vh, 8vh, 9vh);
+    .s8-empty-text {
+      font-size: 1.6rem;
+      line-height: 2.5;
+      color: var(--c-text-soft);
+      font-weight: 200;
    }
  }

  @media (max-width: 1024px) {
-    #scene-8 .s8-layout {
-      top: 16vh;
-      width: min(900px, 90vw);
-      grid-template-columns: 1fr;
-      row-gap: clamp(3vh, 3.5vh, 4.5vh);
+    #scene-8 .s8-hero-unit {
+      grid-column: 2 / 12;
+      grid-row: 2 / 5;
    }
-
-    #scene-8 .s8-left {
-      padding-top: 0;
-      gap: clamp(1.6vh, 2.2vh, 2.8vh);
+    #scene-8 .fragment {
+      position: relative;
+      inset: auto !important;
+      max-width: 100%;
+      text-align: left !important;
+      margin-top: 4vh;
    }
-
-    #scene-8 .s8-name {
-      font-size: clamp(2.4rem, 8.4vw, 4.2rem);
-      letter-spacing: 0.06em;
-    }
-
-    #scene-8 .s8-summary,
-    #scene-8 .s8-quote {
-      max-width: none;
-    }
-
-    #scene-8 .s8-letter-wrap {
-      margin-top: 0;
-    }
-
-    #scene-8 .s8-letter {
-      font-size: clamp(0.9rem, 1.9vw, 1rem);
-      line-height: 1.95;
-    }
-  }
-
-  @media (max-width: 760px) {
-    #scene-8 .s8-layout {
-      top: 14.5vh;
-      width: 92vw;
-      row-gap: clamp(2.2vh, 3vh, 3.8vh);
-    }
-
-    #scene-8 .s8-name {
-      font-size: clamp(2rem, 10vw, 3rem);
-    }
-
-    #scene-8 .s8-summary {
-      font-size: clamp(0.92rem, 3.9vw, 1rem);
-      line-height: 1.85;
-    }
-
-    #scene-8 .s8-summary-count {
-      margin: 0 6px;
-      font-size: clamp(1.1rem, 4.8vw, 1.35rem);
-    }
-
-    #scene-8 .s8-quote {
-      font-size: clamp(0.86rem, 3.5vw, 0.95rem);
-      line-height: 1.8;
-    }
-
-    #scene-8 .s8-letter {
-      border-radius: 14px;
-      padding: 16px 16px 16px 24px;
-      font-size: clamp(0.82rem, 3.4vw, 0.9rem);
-      line-height: 1.82;
-    }
-
-    #scene-8 .s8-letter::before {
-      top: 16px;
-      left: 11px;
-      height: calc(100% - 32px);
-    }
-
-    #scene-8 .s8-empty-wrap {
-      width: 88vw;
-      margin-top: 23vh;
-    }
-
-    #scene-8 .s8-empty-text {
-      font-size: 1rem;
-      line-height: 1.9;
+    #scene-8 .s8-fragments {
+      position: relative;
+      grid-column: 2 / 12;
+      grid-row: 6 / 12;
+      display: flex;
+      flex-direction: column;
    }
  }

--- a/src/pages/AnnualReportWindow.tsx
+++ b/src/pages/AnnualReportWindow.tsx
@@ -872,45 +872,69 @@ function AnnualReportWindow() {
        <div className="reveal-wrap en-tag">
          <div className="reveal-inner serif scene0-cn-tag">曾经的好友</div>
        </div>
+
+        {reportData.lostFriend && (
+          <div className="s8-bg-layer">
+            <img src={reportData.lostFriend.avatarUrl} alt="" className="bg-avatar" />
+          </div>
+        )}
+
+
        {reportData.lostFriend ? (
-          <div className="s8-layout">
-            <div className="s8-left">
-              <div className="reveal-wrap s8-name-wrap">
-                <div className="reveal-inner serif delay-1 s8-name">
+          <div className="s8-floating-layout">
+            <div className="s8-hero-unit">
+              <div className="reveal-wrap">
+                <div className="reveal-inner s8-name delay-1">
                  {reportData.lostFriend.displayName}
                </div>
              </div>
-              <div className="reveal-wrap s8-summary-wrap">
-                <div className="reveal-inner serif delay-2 s8-summary">
-                  后来，你们的交集停留在{reportData.lostFriend.periodDesc}这短短的
-                  <span className="num-display s8-summary-count">
+              <div className="reveal-wrap">
+                <div className="reveal-inner s8-meta delay-2">
+                  {reportData.lostFriend.periodDesc} /
+                  <span className="num-display" style={{ margin: '0 10px', fontSize: '1.4em' }}>
                    <DecodeText value={reportData.lostFriend.lateCount.toLocaleString()} active={currentScene === 8} />
                  </span>
-                  句话里。
-                </div>
-              </div>
-              <div className="reveal-wrap s8-quote-wrap">
-                <div className="reveal-inner serif delay-3 s8-quote">
-                  “我一直相信我们能够再次相见，相信分别的日子总会迎来终结。”
+                  MESSAGES
                </div>
              </div>
            </div>
-            <div className="reveal-wrap s8-letter-wrap">
-              <div className="reveal-inner serif delay-4 s8-letter">
-                所有的离散，或许都只是一场漫长的越冬。飞鸟要越过一万座雪山，才能带来春天的第一行回信；树木要褪去一万次枯叶，才能记住风的形状。如果时间注定要把我们推向不同的象限，那就在记忆的最深处建一座灯塔。哪怕要熬过几千个无法见面的黄昏，也要相信，总有一次日出的晨光，是为了照亮我们重逢的归途。
+
+            <div className="s8-fragments">
+              <div className="reveal-wrap fragment f1">
+                <div className="reveal-inner delay-3">
+                  “我一直相信我们能够再次相见，<br />相信分别的日子总会迎来终结。”
+                </div>
+              </div>
+
+              <div className="reveal-wrap fragment f2">
+                <div className="reveal-inner delay-4">
+                  所有的离散，或许都只是一场漫长的越冬。<br />
+                  飞鸟要越过一万座雪山，才能带来春天的第一行回信；<br />
+                  树木要褪去一万次枯叶，才能记住风的形状。
+                </div>
+              </div>
+
+              <div className="reveal-wrap fragment f3">
+                <div className="reveal-inner delay-5">
+                  哪怕要熬过几千个无法见面的黄昏，也要相信，<br />
+                  总有一次日出的晨光，是为了照亮我们重逢的归途。
+                </div>
              </div>
            </div>
          </div>
        ) : (
-          <div className="reveal-wrap desc-text s8-empty-wrap">
-            <div className="reveal-inner serif delay-1 s8-empty-text">
+          <div className="s8-floating-layout">
+            <div className="reveal-wrap s8-empty-wrap">
+              <div className="reveal-inner serif s8-empty-text delay-1">
                缘分温柔地眷顾着你。<br />
-              这一年，所有重要的人都在，没有一次无疾而终的告别。<br/>
+                这一年，所有重要的人都在，没有一次无疾而终的告别。
+              </div>
            </div>
          </div>
        )}
      </div>

+
      {/* S9: LEXICON & ARCHIVE */}
      <div className={getSceneClass(9)} id="scene-9">
        <div className="reveal-wrap en-tag">
--- a/src/pages/ChatPage.tsx
+++ b/src/pages/ChatPage.tsx
@@ -72,11 +72,146 @@ const GLOBAL_MSG_SEARCH_CANCELED_ERROR = '__WEFLOW_GLOBAL_MSG_SEARCH_CANCELED__'
 const GLOBAL_MSG_SHADOW_COMPARE_SAMPLE_RATE = 0.2
 const GLOBAL_MSG_SHADOW_COMPARE_STORAGE_KEY = 'weflow.debug.searchShadowCompare'
 const MESSAGE_LIST_SCROLL_IDLE_MS = 160
-const MESSAGE_TOP_WHEEL_LOAD_COOLDOWN_MS = 160
+const MESSAGE_TOP_EDGE_LOAD_COOLDOWN_MS = 160
 const MESSAGE_EDGE_TRIGGER_DISTANCE_PX = 96
+const MESSAGE_HISTORY_INITIAL_LIMIT = 50
+const MESSAGE_HISTORY_HEAVY_UNREAD_INITIAL_LIMIT = 70
+const MESSAGE_HISTORY_GROWTH_STEP = 20
+const MESSAGE_HISTORY_MAX_LIMIT = 180
+const MESSAGE_VIRTUAL_OVERSCAN_PX = 140
+const BYTES_PER_MEGABYTE = 1024 * 1024
+const EMOJI_CACHE_MAX_ENTRIES = 260
+const EMOJI_CACHE_MAX_BYTES = 32 * BYTES_PER_MEGABYTE
+const IMAGE_CACHE_MAX_ENTRIES = 360
+const IMAGE_CACHE_MAX_BYTES = 64 * BYTES_PER_MEGABYTE
+const VOICE_CACHE_MAX_ENTRIES = 120
+const VOICE_CACHE_MAX_BYTES = 24 * BYTES_PER_MEGABYTE
+const VOICE_TRANSCRIPT_CACHE_MAX_ENTRIES = 1800
+const VOICE_TRANSCRIPT_CACHE_MAX_BYTES = 2 * BYTES_PER_MEGABYTE
+const SENDER_AVATAR_CACHE_MAX_ENTRIES = 2000
+const AUTO_MEDIA_TASK_MAX_CONCURRENCY = 2
+const AUTO_MEDIA_TASK_MAX_QUEUE = 80

 type RequestIdleCallbackCompat = (callback: () => void, options?: { timeout?: number }) => number

+type BoundedCacheOptions<V> = {
+  maxEntries: number
+  maxBytes?: number
+  estimate?: (value: V) => number
+}
+
+type BoundedCache<V> = {
+  get: (key: string) => V | undefined
+  set: (key: string, value: V) => void
+  has: (key: string) => boolean
+  delete: (key: string) => boolean
+  clear: () => void
+  readonly size: number
+}
+
+function estimateStringBytes(value: string): number {
+  return Math.max(0, value.length * 2)
+}
+
+function createBoundedCache<V>(options: BoundedCacheOptions<V>): BoundedCache<V> {
+  const { maxEntries, maxBytes, estimate } = options
+  const storage = new Map<string, V>()
+  const valueSizes = new Map<string, number>()
+  let currentBytes = 0
+
+  const estimateSize = (value: V): number => {
+    if (!estimate) return 1
+    const raw = estimate(value)
+    if (!Number.isFinite(raw) || raw <= 0) return 1
+    return Math.max(1, Math.round(raw))
+  }
+
+  const removeKey = (key: string): boolean => {
+    if (!storage.has(key)) return false
+    const previousSize = valueSizes.get(key) || 0
+    currentBytes = Math.max(0, currentBytes - previousSize)
+    valueSizes.delete(key)
+    return storage.delete(key)
+  }
+
+  const touch = (key: string, value: V) => {
+    storage.delete(key)
+    storage.set(key, value)
+  }
+
+  const prune = () => {
+    const shouldPruneByBytes = Number.isFinite(maxBytes) && (maxBytes as number) > 0
+    while (storage.size > maxEntries || (shouldPruneByBytes && currentBytes > (maxBytes as number))) {
+      const oldestKey = storage.keys().next().value as string | undefined
+      if (!oldestKey) break
+      removeKey(oldestKey)
+    }
+  }
+
+  return {
+    get(key: string) {
+      const value = storage.get(key)
+      if (value === undefined) return undefined
+      touch(key, value)
+      return value
+    },
+    set(key: string, value: V) {
+      const nextSize = estimateSize(value)
+      if (storage.has(key)) {
+        const previousSize = valueSizes.get(key) || 0
+        currentBytes = Math.max(0, currentBytes - previousSize)
+      }
+      storage.set(key, value)
+      valueSizes.set(key, nextSize)
+      currentBytes += nextSize
+      prune()
+    },
+    has(key: string) {
+      return storage.has(key)
+    },
+    delete(key: string) {
+      return removeKey(key)
+    },
+    clear() {
+      storage.clear()
+      valueSizes.clear()
+      currentBytes = 0
+    },
+    get size() {
+      return storage.size
+    }
+  }
+}
+
+const autoMediaTaskQueue: Array<() => void> = []
+let autoMediaTaskRunningCount = 0
+
+function enqueueAutoMediaTask<T>(task: () => Promise<T>): Promise<T> {
+  return new Promise<T>((resolve, reject) => {
+    const runTask = () => {
+      autoMediaTaskRunningCount += 1
+      task()
+        .then(resolve)
+        .catch(reject)
+        .finally(() => {
+          autoMediaTaskRunningCount = Math.max(0, autoMediaTaskRunningCount - 1)
+          const next = autoMediaTaskQueue.shift()
+          if (next) next()
+        })
+    }
+
+    if (autoMediaTaskRunningCount < AUTO_MEDIA_TASK_MAX_CONCURRENCY) {
+      runTask()
+      return
+    }
+    if (autoMediaTaskQueue.length >= AUTO_MEDIA_TASK_MAX_QUEUE) {
+      reject(new Error('AUTO_MEDIA_TASK_QUEUE_FULL'))
+      return
+    }
+    autoMediaTaskQueue.push(runTask)
+  })
+}
+
 function scheduleWhenIdle(task: () => void, options?: { timeout?: number; fallbackDelay?: number }): void {
  const requestIdleCallbackFn = (
    globalThis as typeof globalThis & { requestIdleCallback?: RequestIdleCallbackCompat }
@@ -1293,7 +1428,7 @@ function ChatPage(props: ChatPageProps) {

  const getMessageKey = useCallback((msg: Message): string => {
    if (msg.messageKey) return msg.messageKey
-    return `fallback:${msg.serverId || 0}:${msg.createTime}:${msg.sortSeq || 0}:${msg.localId || 0}:${msg.senderUsername || ''}:${msg.localType || 0}`
+    return `fallback:${msg._db_path || ''}:${msg.serverId || 0}:${msg.createTime}:${msg.sortSeq || 0}:${msg.localId || 0}:${msg.senderUsername || ''}:${msg.localType || 0}`
  }, [])
  const initialRevealTimerRef = useRef<number | null>(null)
  const sessionListRef = useRef<HTMLDivElement>(null)
@@ -1473,6 +1608,7 @@ function ChatPage(props: ChatPageProps) {
  const searchKeywordRef = useRef('')
  const preloadImageKeysRef = useRef<Set<string>>(new Set())
  const lastPreloadSessionRef = useRef<string | null>(null)
+  const messageMediaPreloadTimerRef = useRef<number | null>(null)
  const detailRequestSeqRef = useRef(0)
  const groupMembersRequestSeqRef = useRef(0)
  const groupMembersPanelCacheRef = useRef<Map<string, GroupMembersPanelCacheEntry>>(new Map())
@@ -2793,6 +2929,11 @@ function ChatPage(props: ChatPageProps) {
  }, [loadMyAvatar, resolveChatCacheScope])

  const handleAccountChanged = useCallback(async () => {
+    emojiDataUrlCache.clear()
+    imageDataUrlCache.clear()
+    voiceDataUrlCache.clear()
+    voiceTranscriptCache.clear()
+    imageDecryptInFlight.clear()
    senderAvatarCache.clear()
    senderAvatarLoading.clear()
    quotedSenderDisplayCache.clear()
@@ -2804,6 +2945,10 @@ function ChatPage(props: ChatPageProps) {
    sessionContactEnrichAttemptAtRef.current.clear()
    preloadImageKeysRef.current.clear()
    lastPreloadSessionRef.current = null
+    if (messageMediaPreloadTimerRef.current !== null) {
+      window.clearTimeout(messageMediaPreloadTimerRef.current)
+      messageMediaPreloadTimerRef.current = null
+    }
    pendingSessionLoadRef.current = null
    initialLoadRequestedSessionRef.current = null
    sessionSwitchRequestSeqRef.current += 1
@@ -3321,8 +3466,8 @@ function ChatPage(props: ChatPageProps) {
      setIsRefreshingMessages(false)
    }
  }
-  // 消息批量大小控制（保持稳定，避免游标反复重建）
-  const currentBatchSizeRef = useRef(50)
+  // 消息批量大小控制（会话内逐步增大，减少频繁触顶加载）
+  const currentBatchSizeRef = useRef(MESSAGE_HISTORY_INITIAL_LIMIT)

  const warmupGroupSenderProfiles = useCallback((usernames: string[], defer = false) => {
    if (!Array.isArray(usernames) || usernames.length === 0) return
@@ -3386,14 +3531,21 @@ function ChatPage(props: ChatPageProps) {
    let messageLimit: number

    if (offset === 0) {
+      const defaultInitialLimit = unreadCount > 99
+        ? MESSAGE_HISTORY_HEAVY_UNREAD_INITIAL_LIMIT
+        : MESSAGE_HISTORY_INITIAL_LIMIT
      const preferredLimit = Number.isFinite(options.forceInitialLimit)
        ? Math.max(10, Math.floor(options.forceInitialLimit as number))
-        : (unreadCount > 99 ? 30 : 40)
-      currentBatchSizeRef.current = preferredLimit
-      messageLimit = preferredLimit
-    } else {
-      // 同一会话内保持固定批量，避免后端游标因 batch 改变而重建
+        : defaultInitialLimit
+      currentBatchSizeRef.current = Math.min(preferredLimit, MESSAGE_HISTORY_MAX_LIMIT)
      messageLimit = currentBatchSizeRef.current
+    } else {
+      const grownBatchSize = Math.min(
+        Math.max(currentBatchSizeRef.current, MESSAGE_HISTORY_INITIAL_LIMIT) + MESSAGE_HISTORY_GROWTH_STEP,
+        MESSAGE_HISTORY_MAX_LIMIT
+      )
+      currentBatchSizeRef.current = grownBatchSize
+      messageLimit = grownBatchSize
    }


@@ -3445,10 +3597,10 @@ function ChatPage(props: ChatPageProps) {
      if (result.success && result.messages) {
        const resultMessages = result.messages
        if (offset === 0) {
+          setNoMessageTable(false)
          setMessages(resultMessages)
          persistSessionPreviewCache(sessionId, resultMessages)
          if (resultMessages.length === 0) {
-            setNoMessageTable(true)
            setHasMoreMessages(false)
          }

@@ -3549,7 +3701,10 @@ function ChatPage(props: ChatPageProps) {
          : offset + resultMessages.length
        setCurrentOffset(nextOffset)
      } else if (!result.success) {
-        setNoMessageTable(true)
+        const errorText = String(result.error || '')
+        const shouldMarkNoTable =
+          /schema mismatch|no message db|no table|消息数据库未找到|消息表|message schema/i.test(errorText)
+        setNoMessageTable(shouldMarkNoTable)
        setHasMoreMessages(false)
      }
    } catch (e) {
@@ -3557,6 +3712,7 @@ function ChatPage(props: ChatPageProps) {
      setConnectionError('加载消息失败')
      setHasMoreMessages(false)
      if (offset === 0 && currentSessionRef.current === sessionId) {
+        setNoMessageTable(false)
        setMessages([])
      }
    } finally {
@@ -4095,7 +4251,7 @@ function ChatPage(props: ChatPageProps) {
      void loadMessages(normalizedSessionId, 0, 0, 0, false, {
        preferLatestPath: true,
        deferGroupSenderWarmup: true,
-        forceInitialLimit: 30,
+        forceInitialLimit: MESSAGE_HISTORY_INITIAL_LIMIT,
        switchRequestSeq
      })
    }
@@ -4586,24 +4742,40 @@ function ChatPage(props: ChatPageProps) {
    setShowScrollToBottom(prev => (prev === shouldShow ? prev : shouldShow))
  }, [messages.length, isLoadingMessages, isLoadingMore, isSessionSwitching])

+  const triggerTopEdgeHistoryLoad = useCallback((): boolean => {
+    if (!currentSessionId || isLoadingMore || isLoadingMessages || !hasMoreMessages) return false
+    const listEl = messageListRef.current
+    if (!listEl) return false
+    const distanceFromTop = Math.max(0, listEl.scrollTop)
+    if (distanceFromTop > MESSAGE_EDGE_TRIGGER_DISTANCE_PX) return false
+    if (topRangeLoadLockRef.current) return false
+    const now = Date.now()
+    if (now - topRangeLoadLastTriggerAtRef.current < MESSAGE_TOP_EDGE_LOAD_COOLDOWN_MS) return false
+    topRangeLoadLastTriggerAtRef.current = now
+    topRangeLoadLockRef.current = true
+    isMessageListAtBottomRef.current = false
+    void loadMessages(currentSessionId, currentOffset, jumpStartTime, jumpEndTime)
+    return true
+  }, [
+    currentSessionId,
+    isLoadingMore,
+    isLoadingMessages,
+    hasMoreMessages,
+    loadMessages,
+    currentOffset,
+    jumpStartTime,
+    jumpEndTime
+  ])
+
  const handleMessageListWheel = useCallback((event: React.WheelEvent<HTMLDivElement>) => {
    markMessageListScrolling()
    if (!currentSessionId || isLoadingMore || isLoadingMessages) return
    const listEl = messageListRef.current
    if (!listEl) return
-    const distanceFromTop = listEl.scrollTop
    const distanceFromBottom = listEl.scrollHeight - (listEl.scrollTop + listEl.clientHeight)

    if (event.deltaY <= -18) {
-      if (!hasMoreMessages) return
-      if (distanceFromTop > MESSAGE_EDGE_TRIGGER_DISTANCE_PX) return
-      if (topRangeLoadLockRef.current) return
-      const now = Date.now()
-      if (now - topRangeLoadLastTriggerAtRef.current < MESSAGE_TOP_WHEEL_LOAD_COOLDOWN_MS) return
-      topRangeLoadLastTriggerAtRef.current = now
-      topRangeLoadLockRef.current = true
-      isMessageListAtBottomRef.current = false
-      void loadMessages(currentSessionId, currentOffset, jumpStartTime, jumpEndTime)
+      triggerTopEdgeHistoryLoad()
      return
    }

@@ -4619,22 +4791,21 @@ function ChatPage(props: ChatPageProps) {
  }, [
    currentSessionId,
    hasMoreLater,
-    hasMoreMessages,
    isLoadingMessages,
    isLoadingMore,
-    currentOffset,
-    jumpStartTime,
-    jumpEndTime,
    markMessageListScrolling,
-    loadMessages,
-    loadLaterMessages
+    loadLaterMessages,
+    triggerTopEdgeHistoryLoad
  ])

  const handleMessageAtTopStateChange = useCallback((atTop: boolean) => {
    if (!atTop) {
      topRangeLoadLockRef.current = false
+      return
    }
-  }, [])
+    // 支持拖动右侧滚动条到顶部时直接触发加载，不依赖滚轮事件。
+    triggerTopEdgeHistoryLoad()
+  }, [triggerTopEdgeHistoryLoad])


  const isSameSession = useCallback((prev: ChatSession, next: ChatSession): boolean => {
@@ -4787,6 +4958,10 @@ function ChatPage(props: ChatPageProps) {
        window.clearTimeout(messageListScrollTimeoutRef.current)
        messageListScrollTimeoutRef.current = null
      }
+      if (messageMediaPreloadTimerRef.current !== null) {
+        window.clearTimeout(messageMediaPreloadTimerRef.current)
+        messageMediaPreloadTimerRef.current = null
+      }
      isMessageListScrollingRef.current = false
      contactUpdateQueueRef.current.clear()
      pendingSessionContactEnrichRef.current.clear()
@@ -4857,9 +5032,18 @@ function ChatPage(props: ChatPageProps) {
  }, [currentSessionId])

  useEffect(() => {
+    if (messageMediaPreloadTimerRef.current !== null) {
+      window.clearTimeout(messageMediaPreloadTimerRef.current)
+      messageMediaPreloadTimerRef.current = null
+    }
    if (!currentSessionId || messages.length === 0) return
-    const preloadEdgeCount = 40
-    const maxPreload = 30
+
+    messageMediaPreloadTimerRef.current = window.setTimeout(() => {
+      messageMediaPreloadTimerRef.current = null
+      scheduleWhenIdle(() => {
+        if (isMessageListScrollingRef.current) return
+        const preloadEdgeCount = 20
+        const maxPreload = 12
        const head = messages.slice(0, preloadEdgeCount)
        const tail = messages.slice(-preloadEdgeCount)
        const candidates = [...head, ...tail]
@@ -4888,6 +5072,15 @@ function ChatPage(props: ChatPageProps) {
            allowCacheIndex: false
          }).catch(() => { })
        }
+      }, { timeout: 1400, fallbackDelay: 120 })
+    }, 120)
+
+    return () => {
+      if (messageMediaPreloadTimerRef.current !== null) {
+        window.clearTimeout(messageMediaPreloadTimerRef.current)
+        messageMediaPreloadTimerRef.current = null
+      }
+    }
  }, [currentSessionId, messages])

  useEffect(() => {
@@ -4983,7 +5176,7 @@ function ChatPage(props: ChatPageProps) {
      void loadMessages(currentSessionId, 0, 0, 0, false, {
        preferLatestPath: true,
        deferGroupSenderWarmup: true,
-        forceInitialLimit: 30
+        forceInitialLimit: MESSAGE_HISTORY_INITIAL_LIMIT
      })
    }
  }, [currentSessionId, isConnected, messages.length, isLoadingMessages, isLoadingMore, noMessageTable])
@@ -5116,6 +5309,18 @@ function ChatPage(props: ChatPageProps) {
      return []
    }

+    const getSessionSortTime = (session: Pick<ChatSession, 'sortTimestamp' | 'lastTimestamp'>) =>
+      Number(session.sortTimestamp || session.lastTimestamp || 0)
+    const insertSessionByTimeDesc = (list: ChatSession[], entry: ChatSession) => {
+      const entryTime = getSessionSortTime(entry)
+      const insertIndex = list.findIndex(s => getSessionSortTime(s) < entryTime)
+      if (insertIndex === -1) {
+        list.push(entry)
+      } else {
+        list.splice(insertIndex, 0, entry)
+      }
+    }
+
    const officialSessions = sessions.filter(s => s.username.startsWith('gh_'))

    // 检查是否有折叠的群聊
@@ -5130,11 +5335,12 @@ function ChatPage(props: ChatPageProps) {

    const latestOfficial = officialSessions.reduce<ChatSession | null>((latest, current) => {
      if (!latest) return current
-      const latestTime = latest.sortTimestamp || latest.lastTimestamp
-      const currentTime = current.sortTimestamp || current.lastTimestamp
+      const latestTime = getSessionSortTime(latest)
+      const currentTime = getSessionSortTime(current)
      return currentTime > latestTime ? current : latest
    }, null)
    const officialUnreadCount = officialSessions.reduce((sum, s) => sum + (s.unreadCount || 0), 0)
+    const officialLatestTime = latestOfficial ? getSessionSortTime(latestOfficial) : 0

    const bizEntry: ChatSession = {
      username: OFFICIAL_ACCOUNTS_VIRTUAL_ID,
@@ -5143,8 +5349,8 @@ function ChatPage(props: ChatPageProps) {
        ? `${latestOfficial.displayName || latestOfficial.username}: ${latestOfficial.summary || '查看公众号历史消息'}`
        : '查看公众号历史消息',
      type: 0,
-      sortTimestamp: 9999999999,  // 放到最前面？  目前还没有严格的对时间进行排序，  后面可以改一下
-      lastTimestamp: latestOfficial?.lastTimestamp || latestOfficial?.sortTimestamp || 0,
+      sortTimestamp: officialLatestTime,
+      lastTimestamp: officialLatestTime,
      lastMsgType: latestOfficial?.lastMsgType || 0,
      unreadCount: officialUnreadCount,
      isMuted: false,
@@ -5152,7 +5358,7 @@ function ChatPage(props: ChatPageProps) {
    }

    if (!visible.some(s => s.username === OFFICIAL_ACCOUNTS_VIRTUAL_ID)) {
-      visible.unshift(bizEntry)
+      insertSessionByTimeDesc(visible, bizEntry)
    }

    if (hasFoldedGroups && !visible.some(s => s.username.toLowerCase().includes('placeholder_foldgroup'))) {
@@ -5176,17 +5382,7 @@ function ChatPage(props: ChatPageProps) {
        isFolded: false
      }

-      // 按时间戳插入到正确位置
-      const foldTime = foldEntry.sortTimestamp || foldEntry.lastTimestamp
-      const insertIndex = visible.findIndex(s => {
-        const sTime = s.sortTimestamp || s.lastTimestamp
-        return sTime < foldTime
-      })
-      if (insertIndex === -1) {
-        visible.push(foldEntry)
-      } else {
-        visible.splice(insertIndex, 0, foldEntry)
-      }
+      insertSessionByTimeDesc(visible, foldEntry)
    }

    if (!searchKeyword.trim()) {
@@ -7074,7 +7270,7 @@ function ChatPage(props: ChatPageProps) {
                    className="message-virtuoso"
                    customScrollParent={messageListScrollParent ?? undefined}
                    data={messages}
-                    overscan={220}
+                    overscan={MESSAGE_VIRTUAL_OVERSCAN_PX}
                    followOutput={(atBottom) => (
                      prependingHistoryRef.current
                        ? false
@@ -8018,10 +8214,26 @@ const globalVoiceManager = {
 }

 // 前端表情包缓存
-const emojiDataUrlCache = new Map<string, string>()
-const imageDataUrlCache = new Map<string, string>()
-const voiceDataUrlCache = new Map<string, string>()
-const voiceTranscriptCache = new Map<string, string>()
+const emojiDataUrlCache = createBoundedCache<string>({
+  maxEntries: EMOJI_CACHE_MAX_ENTRIES,
+  maxBytes: EMOJI_CACHE_MAX_BYTES,
+  estimate: estimateStringBytes
+})
+const imageDataUrlCache = createBoundedCache<string>({
+  maxEntries: IMAGE_CACHE_MAX_ENTRIES,
+  maxBytes: IMAGE_CACHE_MAX_BYTES,
+  estimate: estimateStringBytes
+})
+const voiceDataUrlCache = createBoundedCache<string>({
+  maxEntries: VOICE_CACHE_MAX_ENTRIES,
+  maxBytes: VOICE_CACHE_MAX_BYTES,
+  estimate: estimateStringBytes
+})
+const voiceTranscriptCache = createBoundedCache<string>({
+  maxEntries: VOICE_TRANSCRIPT_CACHE_MAX_ENTRIES,
+  maxBytes: VOICE_TRANSCRIPT_CACHE_MAX_BYTES,
+  estimate: estimateStringBytes
+})
 type SharedImageDecryptResult = {
  success: boolean
  localPath?: string
@@ -8030,7 +8242,9 @@ type SharedImageDecryptResult = {
  failureKind?: 'not_found' | 'decrypt_failed'
 }
 const imageDecryptInFlight = new Map<string, Promise<SharedImageDecryptResult>>()
-const senderAvatarCache = new Map<string, { avatarUrl?: string; displayName?: string }>()
+const senderAvatarCache = createBoundedCache<{ avatarUrl?: string; displayName?: string }>({
+  maxEntries: SENDER_AVATAR_CACHE_MAX_ENTRIES
+})
 const senderAvatarLoading = new Map<string, Promise<{ avatarUrl?: string; displayName?: string } | null>>()

 function getSharedImageDecryptTask(
@@ -8084,7 +8298,7 @@ function QuotedEmoji({ cdnUrl, md5 }: { cdnUrl: string; md5?: string }) {

  if (error || (!loading && !localPath)) return <span className="quoted-type-label">[动画表情]</span>
  if (loading) return <span className="quoted-type-label">[动画表情]</span>
-  return <img src={localPath} alt="动画表情" className="quoted-emoji-image" />
+  return <img src={localPath} alt="动画表情" className="quoted-emoji-image" loading="lazy" decoding="async" />
 }

 // 消息气泡组件
@@ -8187,7 +8401,10 @@ function MessageBubble({
  const [voiceCurrentTime, setVoiceCurrentTime] = useState(0)
  const [voiceDuration, setVoiceDuration] = useState(0)
  const [voiceWaveform, setVoiceWaveform] = useState<number[]>([])
+  const [voiceWaveformRequested, setVoiceWaveformRequested] = useState(false)
  const voiceAutoDecryptTriggered = useRef(false)
+  const pendingScrollerDeltaRef = useRef(0)
+  const pendingScrollerDeltaRafRef = useRef<number | null>(null)


  const [systemAlert, setSystemAlert] = useState<{
@@ -8278,7 +8495,7 @@ function MessageBubble({

  const stabilizeScrollerByDelta = useCallback((host: HTMLElement | null, delta: number) => {
    if (!host) return
-    if (!Number.isFinite(delta) || Math.abs(delta) < 1) return
+    if (!Number.isFinite(delta) || Math.abs(delta) < 1.5) return
    const scroller = host.closest('.message-list') as HTMLDivElement | null
    if (!scroller) return

@@ -8291,7 +8508,17 @@ function MessageBubble({
    const viewportBottom = scroller.scrollTop + scroller.clientHeight
    if (hostTopInScroller > viewportBottom + 24) return

-    scroller.scrollTop += delta
+    pendingScrollerDeltaRef.current += delta
+    if (pendingScrollerDeltaRafRef.current !== null) return
+    pendingScrollerDeltaRafRef.current = window.requestAnimationFrame(() => {
+      pendingScrollerDeltaRafRef.current = null
+      const applyDelta = pendingScrollerDeltaRef.current
+      pendingScrollerDeltaRef.current = 0
+      if (!Number.isFinite(applyDelta) || Math.abs(applyDelta) < 1.5) return
+      const nextScroller = host.closest('.message-list') as HTMLDivElement | null
+      if (!nextScroller) return
+      nextScroller.scrollTop += applyDelta
+    })
  }, [])

  const bindResizeObserverForHost = useCallback((
@@ -8382,12 +8609,12 @@ function MessageBubble({
  useEffect(() => {
    if (!isImage) return
    return bindResizeObserverForHost(imageContainerRef.current, imageObservedHeightRef, imageResizeBaselineRef)
-  }, [isImage, imageLocalPath, imageLoading, imageError, bindResizeObserverForHost])
+  }, [isImage, bindResizeObserverForHost])

  useEffect(() => {
    if (!isEmoji) return
    return bindResizeObserverForHost(emojiContainerRef.current, emojiObservedHeightRef, emojiResizeBaselineRef)
-  }, [isEmoji, emojiLocalPath, emojiLoading, emojiError, bindResizeObserverForHost])
+  }, [isEmoji, bindResizeObserverForHost])

  // 下载表情包
  const downloadEmoji = () => {
@@ -8568,13 +8795,13 @@ function MessageBubble({
    return { success: false }
  }, [isImage, message.imageMd5, message.imageDatName, message.createTime, message.localId, session.username, imageCacheKey, detectImageMimeFromBase64, imageLocalPath, captureImageResizeBaseline, lockImageStageHeight])

-  const triggerForceHd = useCallback(() => {
+  const triggerForceHd = useCallback(async (): Promise<void> => {
    if (!message.imageMd5 && !message.imageDatName) return
    if (imageForceHdAttempted.current === imageCacheKey) return
    if (imageForceHdPending.current) return
    imageForceHdAttempted.current = imageCacheKey
    imageForceHdPending.current = true
-    requestImageDecrypt(true, true).finally(() => {
+    await requestImageDecrypt(true, true).finally(() => {
      imageForceHdPending.current = false
    })
  }, [imageCacheKey, message.imageDatName, message.imageMd5, requestImageDecrypt])
@@ -8662,6 +8889,11 @@ function MessageBubble({
      if (imageClickTimerRef.current) {
        window.clearTimeout(imageClickTimerRef.current)
      }
+      if (pendingScrollerDeltaRafRef.current !== null) {
+        window.cancelAnimationFrame(pendingScrollerDeltaRafRef.current)
+        pendingScrollerDeltaRafRef.current = null
+      }
+      pendingScrollerDeltaRef.current = 0
    }
  }, [])

@@ -8795,14 +9027,16 @@ function MessageBubble({
    if (!message.imageMd5 && !message.imageDatName) return
    if (imageAutoDecryptTriggered.current) return
    imageAutoDecryptTriggered.current = true
-    void requestImageDecrypt()
+    void enqueueAutoMediaTask(async () => requestImageDecrypt()).catch(() => { })
  }, [isImage, imageInView, imageLocalPath, imageLoading, message.imageMd5, message.imageDatName, requestImageDecrypt])

  useEffect(() => {
    if (!isImage || !imageHasUpdate || !imageInView) return
    if (imageAutoHdTriggered.current === imageCacheKey) return
    imageAutoHdTriggered.current = imageCacheKey
-    triggerForceHd()
+    void enqueueAutoMediaTask(async () => {
+      await triggerForceHd()
+    }).catch(() => { })
  }, [isImage, imageHasUpdate, imageInView, imageCacheKey, triggerForceHd])


@@ -8844,30 +9078,36 @@ function MessageBubble({

  // 生成波形数据
  useEffect(() => {
-    if (!voiceDataUrl) {
+    if (!voiceDataUrl || !voiceWaveformRequested) {
      setVoiceWaveform([])
      return
    }

+    let cancelled = false
+    let audioCtx: AudioContext | null = null
+
    const generateWaveform = async () => {
      try {
        // 从 data:audio/wav;base64,... 提取 base64
        const base64 = voiceDataUrl.split(',')[1]
+        if (!base64) return
        const binaryString = window.atob(base64)
        const bytes = new Uint8Array(binaryString.length)
        for (let i = 0; i < binaryString.length; i++) {
          bytes[i] = binaryString.charCodeAt(i)
        }

-        const audioCtx = new (window.AudioContext || (window as any).webkitAudioContext)()
+        audioCtx = new (window.AudioContext || (window as any).webkitAudioContext)()
        const audioBuffer = await audioCtx.decodeAudioData(bytes.buffer)
+        if (cancelled) return
        const rawData = audioBuffer.getChannelData(0) // 获取单声道数据
-        const samples = 35 // 波形柱子数量
+        const samples = 24 // 波形柱子数量（降低解码计算成本）
        const blockSize = Math.floor(rawData.length / samples)
+        if (blockSize <= 0) return
        const filteredData: number[] = []

        for (let i = 0; i < samples; i++) {
-          let blockStart = blockSize * i
+          const blockStart = blockSize * i
          let sum = 0
          for (let j = 0; j < blockSize; j++) {
            sum = sum + Math.abs(rawData[blockStart + j])
@@ -8876,19 +9116,39 @@ function MessageBubble({
        }

        // 归一化
-        const multiplier = Math.pow(Math.max(...filteredData), -1)
+        const peak = Math.max(...filteredData)
+        if (!Number.isFinite(peak) || peak <= 0) return
+        const multiplier = Math.pow(peak, -1)
        const normalizedData = filteredData.map(n => n * multiplier)
+        if (!cancelled) {
          setVoiceWaveform(normalizedData)
-        void audioCtx.close()
+        }
      } catch (e) {
        console.error('Failed to generate waveform:', e)
        // 降级：生成随机但平滑的波形
-        setVoiceWaveform(Array.from({ length: 35 }, () => 0.2 + Math.random() * 0.8))
+        if (!cancelled) {
+          setVoiceWaveform(Array.from({ length: 24 }, () => 0.2 + Math.random() * 0.8))
+        }
+      } finally {
+        if (audioCtx) {
+          void audioCtx.close().catch(() => { })
+        }
      }
    }

+    scheduleWhenIdle(() => {
+      if (cancelled) return
      void generateWaveform()
-  }, [voiceDataUrl])
+    }, { timeout: 900, fallbackDelay: 80 })
+
+    return () => {
+      cancelled = true
+      if (audioCtx) {
+        void audioCtx.close().catch(() => { })
+        audioCtx = null
+      }
+    }
+  }, [voiceDataUrl, voiceWaveformRequested])

  // 消息加载时自动检测语音缓存
  useEffect(() => {
@@ -9072,7 +9332,9 @@ function MessageBubble({
    if (videoAutoLoadTriggered.current) return

    videoAutoLoadTriggered.current = true
-    void requestVideoInfo()
+    void enqueueAutoMediaTask(async () => requestVideoInfo()).catch(() => {
+      videoAutoLoadTriggered.current = false
+    })
  }, [isVideo, isVideoVisible, videoInfo, requestVideoInfo])

  useEffect(() => {
@@ -9391,6 +9653,8 @@ function MessageBubble({
                  src={imageLocalPath}
                  alt="图片"
                  className={`image-message ${imageLoaded ? 'ready' : 'pending'}`}
+                  loading="lazy"
+                  decoding="async"
                  onClick={() => { void handleOpenImageViewer() }}
                  onLoad={() => {
                    setImageLoaded(true)
@@ -9469,7 +9733,7 @@ function MessageBubble({
      return (
          <div className="video-thumb-wrapper" ref={videoContainerRef as React.RefObject<HTMLDivElement>} onClick={handlePlayVideo}>
          {thumbSrc ? (
-            <img src={thumbSrc} alt="视频缩略图" className="video-thumb" />
+            <img src={thumbSrc} alt="视频缩略图" className="video-thumb" loading="lazy" decoding="async" />
          ) : (
            <div className="video-thumb-placeholder">
              <svg width="32" height="32" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
@@ -9489,6 +9753,9 @@ function MessageBubble({
      const durationText = message.voiceDurationSeconds ? `${message.voiceDurationSeconds}"` : ''
      const handleToggle = async () => {
        if (voiceLoading) return
+        if (!voiceWaveformRequested) {
+          setVoiceWaveformRequested(true)
+        }
        const audio = voiceAudioRef.current || new Audio()
        if (!voiceAudioRef.current) {
          voiceAudioRef.current = audio
--- a/src/pages/DualReportWindow.scss
+++ b/src/pages/DualReportWindow.scss
--- a/src/pages/DualReportWindow.tsx
+++ b/src/pages/DualReportWindow.tsx
--- a/src/pages/ExportPage.tsx
+++ b/src/pages/ExportPage.tsx
@@ -1899,7 +1899,7 @@ const TaskCenterModal = memo(function TaskCenterModal({
                  ? `缓存命中 ${mediaCacheHitFiles}/${mediaCacheTotal}`
                  : ''
                const mediaMissMetricLabel = mediaCacheMissFiles > 0
-                  ? `未导出 ${mediaCacheMissFiles} 个文件/媒体`
+                  ? `缓存未命中 ${mediaCacheMissFiles}`
                  : ''
                const mediaDedupMetricLabel = mediaDedupReuseFiles > 0
                  ? `复用 ${mediaDedupReuseFiles}`
@@ -1914,7 +1914,7 @@ const TaskCenterModal = memo(function TaskCenterModal({
                  )
                  : ''
                const mediaLiveMetricLabel = task.progress.phase === 'exporting-media'
-                  ? (mediaDoneFiles > 0 ? `已处理 ${mediaDoneFiles}` : '')
+                  ? (mediaDoneFiles > 0 ? `已写入 ${mediaDoneFiles}` : '')
                  : ''
                const sessionProgressLabel = completedSessionTotal > 0
                  ? `会话 ${completedSessionCount}/${completedSessionTotal}`
@@ -2238,6 +2238,27 @@ function ExportPage() {
    exportConcurrency: 2
  })

+  const exportStatsRangeOptions = useMemo(() => {
+    if (options.useAllTime || !options.dateRange) return null
+    const beginTimestamp = Math.floor(options.dateRange.start.getTime() / 1000)
+    const endTimestamp = Math.floor(options.dateRange.end.getTime() / 1000)
+    if (!Number.isFinite(beginTimestamp) || !Number.isFinite(endTimestamp)) return null
+    if (beginTimestamp <= 0 && endTimestamp <= 0) return null
+    return {
+      beginTimestamp: Math.max(0, beginTimestamp),
+      endTimestamp: Math.max(0, endTimestamp)
+    }
+  }, [options.useAllTime, options.dateRange])
+
+  const withExportStatsRange = useCallback((statsOptions: Record<string, any>): Record<string, any> => {
+    if (!exportStatsRangeOptions) return statsOptions
+    return {
+      ...statsOptions,
+      beginTimestamp: exportStatsRangeOptions.beginTimestamp,
+      endTimestamp: exportStatsRangeOptions.endTimestamp
+    }
+  }, [exportStatsRangeOptions])
+
  const [exportDialog, setExportDialog] = useState<ExportDialogState>({
    open: false,
    intent: 'manual',
@@ -4003,7 +4024,7 @@ function ExportPage() {
          const cacheResult = await withTimeout(
            window.electronAPI.chat.getExportSessionStats(
              batchSessionIds,
-              { includeRelations: false, allowStaleCache: true, cacheOnly: true }
+              withExportStatsRange({ includeRelations: false, allowStaleCache: true, cacheOnly: true })
            ),
            12000,
            'cacheOnly'
@@ -4018,7 +4039,7 @@ function ExportPage() {
            const freshResult = await withTimeout(
              window.electronAPI.chat.getExportSessionStats(
                missingSessionIds,
-                { includeRelations: false, allowStaleCache: true }
+                withExportStatsRange({ includeRelations: false, allowStaleCache: true })
              ),
              45000,
              'fresh'
@@ -4062,7 +4083,7 @@ function ExportPage() {
        void runSessionMediaMetricWorker(runId)
      }
    }
-  }, [applySessionMediaMetricsFromStats, isSessionMediaMetricReady, patchSessionLoadTraceStage])
+  }, [applySessionMediaMetricsFromStats, isSessionMediaMetricReady, patchSessionLoadTraceStage, withExportStatsRange])

  const scheduleSessionMediaMetricWorker = useCallback(() => {
    if (activeTaskCountRef.current > 0) return
@@ -7243,7 +7264,7 @@ function ExportPage() {
      try {
        const quickStatsResult = await window.electronAPI.chat.getExportSessionStats(
          [normalizedSessionId],
-          { includeRelations: false, allowStaleCache: true, cacheOnly: true }
+          withExportStatsRange({ includeRelations: false, allowStaleCache: true, cacheOnly: true })
        )
        if (requestSeq !== detailRequestSeqRef.current) return
        if (quickStatsResult.success) {
@@ -7270,7 +7291,7 @@ function ExportPage() {
      try {
        const relationCacheResult = await window.electronAPI.chat.getExportSessionStats(
          [normalizedSessionId],
-          { includeRelations: true, allowStaleCache: true, cacheOnly: true }
+          withExportStatsRange({ includeRelations: true, allowStaleCache: true, cacheOnly: true })
        )
        if (requestSeq !== detailRequestSeqRef.current) return
        if (relationCacheResult.success && relationCacheResult.data) {
@@ -7295,7 +7316,7 @@ function ExportPage() {
            // 后台补齐非关系统计，不走精确特型扫描，避免阻塞列表统计队列。
            const freshResult = await window.electronAPI.chat.getExportSessionStats(
              [normalizedSessionId],
-              { includeRelations: false, forceRefresh: true }
+              withExportStatsRange({ includeRelations: false, forceRefresh: true })
            )
            if (requestSeq !== detailRequestSeqRef.current) return
            if (freshResult.success && freshResult.data) {
@@ -7330,7 +7351,7 @@ function ExportPage() {
        setIsLoadingSessionDetailExtra(false)
      }
    }
-  }, [applySessionDetailStats, contactByUsername, mergeSessionContentMetrics, sessionContentMetrics, sessionMessageCounts, sessionRowByUsername])
+  }, [applySessionDetailStats, contactByUsername, mergeSessionContentMetrics, sessionContentMetrics, sessionMessageCounts, sessionRowByUsername, withExportStatsRange])

  const loadSessionRelationStats = useCallback(async (options?: { forceRefresh?: boolean }) => {
    const normalizedSessionId = String(sessionDetail?.wxid || '').trim()
@@ -7343,7 +7364,7 @@ function ExportPage() {
      if (!forceRefresh) {
        const relationCacheResult = await window.electronAPI.chat.getExportSessionStats(
          [normalizedSessionId],
-          { includeRelations: true, allowStaleCache: true, cacheOnly: true }
+          withExportStatsRange({ includeRelations: true, allowStaleCache: true, cacheOnly: true })
        )
        if (requestSeq !== detailRequestSeqRef.current) return

@@ -7361,7 +7382,7 @@ function ExportPage() {

      const relationResult = await window.electronAPI.chat.getExportSessionStats(
        [normalizedSessionId],
-        { includeRelations: true, forceRefresh, preferAccurateSpecialTypes: true }
+        withExportStatsRange({ includeRelations: true, forceRefresh, preferAccurateSpecialTypes: true })
      )
      if (requestSeq !== detailRequestSeqRef.current) return

@@ -7381,7 +7402,7 @@ function ExportPage() {
        setIsLoadingSessionRelationStats(false)
      }
    }
-  }, [applySessionDetailStats, isLoadingSessionRelationStats, sessionDetail?.wxid])
+  }, [applySessionDetailStats, isLoadingSessionRelationStats, sessionDetail?.wxid, withExportStatsRange])

  const handleRefreshTableData = useCallback(async () => {
    const scopeKey = await ensureExportCacheScope()
--- a/src/stores/chatStore.ts
+++ b/src/stores/chatStore.ts
@@ -3,13 +3,15 @@ import type { ChatSession, Message, Contact } from '../types/models'

 const messageAliasIndex = new Set<string>()

-function buildPrimaryMessageKey(message: Message): string {
+function buildPrimaryMessageKey(message: Message, sourceScope?: string): string {
  if (message.messageKey) return String(message.messageKey)
-  return `fallback:${message.serverId || 0}:${message.createTime}:${message.sortSeq || 0}:${message.localId || 0}:${message.senderUsername || ''}:${message.localType || 0}`
+  const normalizedSourceScope = sourceScope ?? String(message._db_path || '').trim()
+  return `fallback:${normalizedSourceScope}:${message.serverId || 0}:${message.createTime}:${message.sortSeq || 0}:${message.localId || 0}:${message.senderUsername || ''}:${message.localType || 0}`
 }

 function buildMessageAliasKeys(message: Message): string[] {
-  const keys = [buildPrimaryMessageKey(message)]
+  const sourceScope = String(message._db_path || '').trim()
+  const keys = [buildPrimaryMessageKey(message, sourceScope)]
  const localId = Math.max(0, Number(message.localId || 0))
  const serverId = Math.max(0, Number(message.serverId || 0))
  const createTime = Math.max(0, Number(message.createTime || 0))
@@ -18,15 +20,26 @@ function buildMessageAliasKeys(message: Message): string[] {
  const isSend = Number(message.isSend ?? -1)

  if (localId > 0) {
-    keys.push(`lid:${localId}`)
+    // 跨 message_*.db 时 local_id 可能重复，必须带分库上下文避免误去重。
+    if (sourceScope) {
+      keys.push(`lid:${sourceScope}:${localId}`)
+    } else {
+      // 缺库信息时使用更保守组合，尽量避免把不同消息误判成重复。
+      keys.push(`lid_fallback:${localId}:${createTime}:${sender}:${localType}:${serverId}`)
+    }
  }
  if (serverId > 0) {
-    keys.push(`sid:${serverId}`)
+    // server_id 在跨库场景并非绝对全局唯一；必须带来源作用域避免误去重。
+    if (sourceScope) {
+      keys.push(`sid:${sourceScope}:${serverId}`)
+    } else {
+      keys.push(`sid_fallback:${serverId}:${createTime}:${sender}:${localType}`)
+    }
  }
  if (localType === 3) {
    const imageIdentity = String(message.imageMd5 || message.imageDatName || '').trim()
    if (imageIdentity) {
-      keys.push(`img:${createTime}:${sender}:${isSend}:${imageIdentity}`)
+      keys.push(`img:${sourceScope}:${createTime}:${sender}:${isSend}:${imageIdentity}`)
    }
  }

@@ -37,7 +50,9 @@ function rebuildMessageAliasIndex(messages: Message[]): void {
  messageAliasIndex.clear()
  for (const message of messages) {
    const aliasKeys = buildMessageAliasKeys(message)
-    aliasKeys.forEach((key) => messageAliasIndex.add(key))
+    for (const key of aliasKeys) {
+      messageAliasIndex.add(key)
+    }
  }
 }

@@ -136,10 +151,18 @@ export const useChatStore = create<ChatState>((set, get) => ({
    const filtered: Message[] = []
    newMessages.forEach((msg) => {
      const aliasKeys = buildMessageAliasKeys(msg)
-      const exists = aliasKeys.some((key) => messageAliasIndex.has(key))
+      let exists = false
+      for (const key of aliasKeys) {
+        if (messageAliasIndex.has(key)) {
+          exists = true
+          break
+        }
+      }
      if (exists) return
      filtered.push(msg)
-      aliasKeys.forEach((key) => messageAliasIndex.add(key))
+      for (const key of aliasKeys) {
+        messageAliasIndex.add(key)
+      }
    })

    if (filtered.length === 0) return state
--- a/src/types/electron.d.ts
+++ b/src/types/electron.d.ts
@@ -311,6 +311,8 @@ export interface ElectronAPI {
        allowStaleCache?: boolean
        preferAccurateSpecialTypes?: boolean
        cacheOnly?: boolean
+        beginTimestamp?: number
+        endTimestamp?: number
      }
    ) => Promise<{
      success: boolean
@@ -1219,5 +1221,3 @@ declare global {

 export { }

-
-
Author	SHA1	Message	Date
cc	c923327112	修复 #820；支持企业用户会话显示；优化聊天页面性能	2026-04-23 23:41:20 +08:00
cc	c25b231f9c	Merge pull request #823 from Jasonzhu1207/main fix(perf): prevent memory growth in chat and export flows	2026-04-23 18:41:04 +08:00
Jason	fbc2c8d900	Merge pull request #33 from Jasonzhu1207/fix/perf-memory-growth fix(perf): prevent memory growth in chat and export flows	2026-04-22 23:51:18 +08:00
Jason	6304c9ed51	fix(perf): prevent memory growth in chat and export flows	2026-04-22 23:30:28 +08:00
cc	777f5b82db	优化底层游标索引性能；优化HTTPAPI索引逻辑；优化导出图片的索引写入逻辑	2026-04-22 23:02:17 +08:00
cc	5802cf36c6	年报S8临时修改	2026-04-21 23:44:20 +08:00
xuncha	e3174370bb	Merge pull request #817 from xunchahaha:dev 修复双人年度报告[Bug]: 双人年度报告坏了	2026-04-21 20:21:01 +08:00
xuncha	0f8a9602bd	修复双人年度报告[Bug]: 双人年度报告坏了 Fixes #816	2026-04-21 20:20:11 +08:00
cc	30d54fcdb1	Merge pull request #807 from hicccc77/dev Dev	2026-04-20 23:26:07 +08:00
cc	eca1411c68	Merge pull request #806 from hicccc77/dev Dev	2026-04-20 23:23:22 +08:00