feat(export): optimize batch export flow and unify session detail typing

2026-03-25 07:16:51 +00:00 · 2026-03-02 18:14:11 +08:00
parent 750d6ad7eb
commit ac481c6b18
17 changed files with 2102 additions and 307 deletions
--- a/electron/services/chatService.ts
+++ b/electron/services/chatService.ts
@@ -12,6 +12,7 @@ import { ConfigService } from './config'
 import { wcdbService } from './wcdbService'
 import { MessageCacheService } from './messageCacheService'
 import { ContactCacheService, ContactCacheEntry } from './contactCacheService'
+import { SessionStatsCacheService, SessionStatsCacheEntry, SessionStatsCacheStats } from './sessionStatsCacheService'
 import { voiceTranscribeService } from './voiceTranscribeService'
 import { LRUCache } from '../utils/LRUCache.js'

@@ -152,6 +153,19 @@ interface ExportSessionStats {
  groupMutualFriends?: number
 }

+interface ExportSessionStatsOptions {
+  includeRelations?: boolean
+  forceRefresh?: boolean
+  allowStaleCache?: boolean
+}
+
+interface ExportSessionStatsCacheMeta {
+  updatedAt: number
+  stale: boolean
+  includeRelations: boolean
+  source: 'memory' | 'disk' | 'fresh'
+}
+
 interface ExportTabCounts {
  private: number
  group: number
@@ -194,6 +208,7 @@ class ChatService {
  private hardlinkCache = new Map<string, HardlinkState>()
  private readonly contactCacheService: ContactCacheService
  private readonly messageCacheService: MessageCacheService
+  private readonly sessionStatsCacheService: SessionStatsCacheService
  private voiceWavCache: LRUCache<string, Buffer>
  private voiceTranscriptCache: LRUCache<string, string>
  private voiceTranscriptPending = new Map<string, Promise<{ success: boolean; transcript?: string; error?: string }>>()
@@ -225,6 +240,13 @@ class ChatService {
  private readonly sessionDetailExtraCacheTtlMs = 5 * 60 * 1000
  private sessionStatusCache = new Map<string, { isFolded?: boolean; isMuted?: boolean; updatedAt: number }>()
  private readonly sessionStatusCacheTtlMs = 10 * 60 * 1000
+  private sessionStatsCacheScope = ''
+  private sessionStatsMemoryCache = new Map<string, SessionStatsCacheEntry>()
+  private sessionStatsPendingBasic = new Map<string, Promise<ExportSessionStats>>()
+  private sessionStatsPendingFull = new Map<string, Promise<ExportSessionStats>>()
+  private allGroupSessionIdsCache: { ids: string[]; updatedAt: number } | null = null
+  private readonly sessionStatsCacheTtlMs = 10 * 60 * 1000
+  private readonly allGroupSessionIdsCacheTtlMs = 5 * 60 * 1000

  constructor() {
    this.configService = new ConfigService()
@@ -232,6 +254,7 @@ class ChatService {
    const persisted = this.contactCacheService.getAllEntries()
    this.avatarCache = new Map(Object.entries(persisted))
    this.messageCacheService = new MessageCacheService(this.configService.getCacheBasePath())
+    this.sessionStatsCacheService = new SessionStatsCacheService(this.configService.getCacheBasePath())
    // 初始化LRU缓存，限制大小防止内存泄漏
    this.voiceWavCache = new LRUCache(this.voiceWavCacheMaxEntries)
    this.voiceTranscriptCache = new LRUCache(1000) // 最多缓存1000条转写记录
@@ -319,6 +342,7 @@ class ChatService {
    // 使用 C++ DLL 内部的文件监控 (ReadDirectoryChangesW)
    // 这种方式更高效，且不占用 JS 线程，并能直接监听 session/message 目录变更
    wcdbService.setMonitor((type, json) => {
+      this.handleSessionStatsMonitorChange(type, json)
      // 广播给所有渲染进程窗口
      BrowserWindow.getAllWindows().forEach((win) => {
        if (!win.isDestroyed()) {
@@ -1558,13 +1582,212 @@ class ChatService {
    const dbPath = String(this.configService.get('dbPath') || '')
    const myWxid = String(this.configService.get('myWxid') || '')
    const scope = `${dbPath}::${myWxid}`
-    if (scope === this.sessionMessageCountCacheScope) return
+    if (scope === this.sessionMessageCountCacheScope) {
+      this.refreshSessionStatsCacheScope(scope)
+      return
+    }
    this.sessionMessageCountCacheScope = scope
    this.sessionMessageCountCache.clear()
    this.sessionMessageCountHintCache.clear()
    this.sessionDetailFastCache.clear()
    this.sessionDetailExtraCache.clear()
    this.sessionStatusCache.clear()
+    this.refreshSessionStatsCacheScope(scope)
+  }
+
+  private refreshSessionStatsCacheScope(scope: string): void {
+    if (scope === this.sessionStatsCacheScope) return
+    this.sessionStatsCacheScope = scope
+    this.sessionStatsMemoryCache.clear()
+    this.sessionStatsPendingBasic.clear()
+    this.sessionStatsPendingFull.clear()
+    this.allGroupSessionIdsCache = null
+  }
+
+  private buildScopedSessionStatsKey(sessionId: string): string {
+    return `${this.sessionStatsCacheScope}::${sessionId}`
+  }
+
+  private toSessionStatsCacheStats(stats: ExportSessionStats): SessionStatsCacheStats {
+    const normalized: SessionStatsCacheStats = {
+      totalMessages: Number.isFinite(stats.totalMessages) ? Math.max(0, Math.floor(stats.totalMessages)) : 0,
+      voiceMessages: Number.isFinite(stats.voiceMessages) ? Math.max(0, Math.floor(stats.voiceMessages)) : 0,
+      imageMessages: Number.isFinite(stats.imageMessages) ? Math.max(0, Math.floor(stats.imageMessages)) : 0,
+      videoMessages: Number.isFinite(stats.videoMessages) ? Math.max(0, Math.floor(stats.videoMessages)) : 0,
+      emojiMessages: Number.isFinite(stats.emojiMessages) ? Math.max(0, Math.floor(stats.emojiMessages)) : 0
+    }
+
+    if (Number.isFinite(stats.firstTimestamp)) normalized.firstTimestamp = Math.max(0, Math.floor(stats.firstTimestamp as number))
+    if (Number.isFinite(stats.lastTimestamp)) normalized.lastTimestamp = Math.max(0, Math.floor(stats.lastTimestamp as number))
+    if (Number.isFinite(stats.privateMutualGroups)) normalized.privateMutualGroups = Math.max(0, Math.floor(stats.privateMutualGroups as number))
+    if (Number.isFinite(stats.groupMemberCount)) normalized.groupMemberCount = Math.max(0, Math.floor(stats.groupMemberCount as number))
+    if (Number.isFinite(stats.groupMyMessages)) normalized.groupMyMessages = Math.max(0, Math.floor(stats.groupMyMessages as number))
+    if (Number.isFinite(stats.groupActiveSpeakers)) normalized.groupActiveSpeakers = Math.max(0, Math.floor(stats.groupActiveSpeakers as number))
+    if (Number.isFinite(stats.groupMutualFriends)) normalized.groupMutualFriends = Math.max(0, Math.floor(stats.groupMutualFriends as number))
+
+    return normalized
+  }
+
+  private fromSessionStatsCacheStats(stats: SessionStatsCacheStats): ExportSessionStats {
+    return {
+      totalMessages: stats.totalMessages,
+      voiceMessages: stats.voiceMessages,
+      imageMessages: stats.imageMessages,
+      videoMessages: stats.videoMessages,
+      emojiMessages: stats.emojiMessages,
+      firstTimestamp: stats.firstTimestamp,
+      lastTimestamp: stats.lastTimestamp,
+      privateMutualGroups: stats.privateMutualGroups,
+      groupMemberCount: stats.groupMemberCount,
+      groupMyMessages: stats.groupMyMessages,
+      groupActiveSpeakers: stats.groupActiveSpeakers,
+      groupMutualFriends: stats.groupMutualFriends
+    }
+  }
+
+  private supportsRequestedRelation(entry: SessionStatsCacheEntry, includeRelations: boolean): boolean {
+    if (!includeRelations) return true
+    return entry.includeRelations
+  }
+
+  private getSessionStatsCacheEntry(sessionId: string): { entry: SessionStatsCacheEntry; source: 'memory' | 'disk' } | null {
+    const scopedKey = this.buildScopedSessionStatsKey(sessionId)
+    const inMemory = this.sessionStatsMemoryCache.get(scopedKey)
+    if (inMemory) {
+      return { entry: inMemory, source: 'memory' }
+    }
+
+    const persisted = this.sessionStatsCacheService.get(this.sessionStatsCacheScope, sessionId)
+    if (!persisted) return null
+    this.sessionStatsMemoryCache.set(scopedKey, persisted)
+    return { entry: persisted, source: 'disk' }
+  }
+
+  private setSessionStatsCacheEntry(sessionId: string, stats: ExportSessionStats, includeRelations: boolean): number {
+    const updatedAt = Date.now()
+    const entry: SessionStatsCacheEntry = {
+      updatedAt,
+      includeRelations,
+      stats: this.toSessionStatsCacheStats(stats)
+    }
+    const scopedKey = this.buildScopedSessionStatsKey(sessionId)
+    this.sessionStatsMemoryCache.set(scopedKey, entry)
+    this.sessionStatsCacheService.set(this.sessionStatsCacheScope, sessionId, entry)
+    return updatedAt
+  }
+
+  private deleteSessionStatsCacheEntry(sessionId: string): void {
+    const scopedKey = this.buildScopedSessionStatsKey(sessionId)
+    this.sessionStatsMemoryCache.delete(scopedKey)
+    this.sessionStatsPendingBasic.delete(scopedKey)
+    this.sessionStatsPendingFull.delete(scopedKey)
+    this.sessionStatsCacheService.delete(this.sessionStatsCacheScope, sessionId)
+  }
+
+  private clearSessionStatsCacheForScope(): void {
+    this.sessionStatsMemoryCache.clear()
+    this.sessionStatsPendingBasic.clear()
+    this.sessionStatsPendingFull.clear()
+    this.allGroupSessionIdsCache = null
+    this.sessionStatsCacheService.clearScope(this.sessionStatsCacheScope)
+  }
+
+  private collectSessionIdsFromPayload(payload: unknown): Set<string> {
+    const ids = new Set<string>()
+    const walk = (value: unknown, keyHint?: string) => {
+      if (Array.isArray(value)) {
+        for (const item of value) walk(item, keyHint)
+        return
+      }
+      if (value && typeof value === 'object') {
+        for (const [k, v] of Object.entries(value as Record<string, unknown>)) {
+          walk(v, k)
+        }
+        return
+      }
+      if (typeof value !== 'string') return
+      const normalized = value.trim()
+      if (!normalized) return
+      const lowerKey = String(keyHint || '').toLowerCase()
+      const keyLooksLikeSession = (
+        lowerKey.includes('session') ||
+        lowerKey.includes('talker') ||
+        lowerKey.includes('username') ||
+        lowerKey.includes('chatroom')
+      )
+      if (!keyLooksLikeSession && !normalized.includes('@chatroom')) {
+        return
+      }
+      ids.add(normalized)
+    }
+    walk(payload)
+    return ids
+  }
+
+  private handleSessionStatsMonitorChange(type: string, json: string): void {
+    this.refreshSessionMessageCountCacheScope()
+    if (!this.sessionStatsCacheScope) return
+
+    const normalizedType = String(type || '').toLowerCase()
+    const maybeJson = String(json || '').trim()
+    let ids = new Set<string>()
+    if (maybeJson) {
+      try {
+        ids = this.collectSessionIdsFromPayload(JSON.parse(maybeJson))
+      } catch {
+        ids = this.collectSessionIdsFromPayload(maybeJson)
+      }
+    }
+
+    if (ids.size > 0) {
+      ids.forEach((sessionId) => this.deleteSessionStatsCacheEntry(sessionId))
+      if (Array.from(ids).some((id) => id.includes('@chatroom'))) {
+        this.allGroupSessionIdsCache = null
+      }
+      return
+    }
+
+    // 无法定位具体会话时，保守地仅在消息/群成员相关变更时清空当前 scope，避免展示过旧统计。
+    if (
+      normalizedType.includes('message') ||
+      normalizedType.includes('session') ||
+      normalizedType.includes('group') ||
+      normalizedType.includes('member') ||
+      normalizedType.includes('contact')
+    ) {
+      this.clearSessionStatsCacheForScope()
+    }
+  }
+
+  private async listAllGroupSessionIds(): Promise<string[]> {
+    const now = Date.now()
+    if (
+      this.allGroupSessionIdsCache &&
+      now - this.allGroupSessionIdsCache.updatedAt <= this.allGroupSessionIdsCacheTtlMs
+    ) {
+      return this.allGroupSessionIdsCache.ids
+    }
+
+    const result = await wcdbService.getSessions()
+    if (!result.success || !Array.isArray(result.sessions)) {
+      return []
+    }
+
+    const ids = new Set<string>()
+    for (const rowAny of result.sessions) {
+      const row = rowAny as Record<string, unknown>
+      const usernameRaw = row.username ?? row.userName ?? row.talker ?? row.sessionId
+      const username = String(usernameRaw || '').trim()
+      if (!username || !username.endsWith('@chatroom')) continue
+      ids.add(username)
+    }
+
+    const list = Array.from(ids)
+    this.allGroupSessionIdsCache = {
+      ids: list,
+      updatedAt: now
+    }
+    return list
  }

  private async collectSessionExportStats(
@@ -1715,6 +1938,95 @@ class ChatService {
    return { privateMutualGroupMap, groupMutualFriendMap }
  }

+  private buildEmptyExportSessionStats(sessionId: string, includeRelations: boolean): ExportSessionStats {
+    const isGroup = sessionId.endsWith('@chatroom')
+    const stats: ExportSessionStats = {
+      totalMessages: 0,
+      voiceMessages: 0,
+      imageMessages: 0,
+      videoMessages: 0,
+      emojiMessages: 0
+    }
+    if (isGroup) {
+      stats.groupMyMessages = 0
+      stats.groupActiveSpeakers = 0
+      stats.groupMemberCount = 0
+      if (includeRelations) {
+        stats.groupMutualFriends = 0
+      }
+    } else if (includeRelations) {
+      stats.privateMutualGroups = 0
+    }
+    return stats
+  }
+
+  private async computeSessionExportStats(
+    sessionId: string,
+    selfIdentitySet: Set<string>,
+    includeRelations: boolean
+  ): Promise<ExportSessionStats> {
+    const stats = await this.collectSessionExportStats(sessionId, selfIdentitySet)
+    const isGroup = sessionId.endsWith('@chatroom')
+
+    if (isGroup) {
+      const memberCountsResult = await wcdbService.getGroupMemberCounts([sessionId])
+      const memberCountMap = memberCountsResult.success && memberCountsResult.map ? memberCountsResult.map : {}
+      stats.groupMemberCount = typeof memberCountMap[sessionId] === 'number' ? Math.max(0, Math.floor(memberCountMap[sessionId])) : 0
+    }
+
+    if (includeRelations) {
+      if (isGroup) {
+        try {
+          const { groupMutualFriendMap } = await this.buildGroupRelationStats([sessionId], [], selfIdentitySet)
+          stats.groupMutualFriends = groupMutualFriendMap[sessionId] || 0
+        } catch {
+          stats.groupMutualFriends = 0
+        }
+      } else {
+        const allGroups = await this.listAllGroupSessionIds()
+        if (allGroups.length === 0) {
+          stats.privateMutualGroups = 0
+        } else {
+          try {
+            const { privateMutualGroupMap } = await this.buildGroupRelationStats(allGroups, [sessionId], selfIdentitySet)
+            stats.privateMutualGroups = privateMutualGroupMap[sessionId] || 0
+          } catch {
+            stats.privateMutualGroups = 0
+          }
+        }
+      }
+    }
+
+    return stats
+  }
+
+  private async getOrComputeSessionExportStats(
+    sessionId: string,
+    includeRelations: boolean,
+    selfIdentitySet: Set<string>
+  ): Promise<ExportSessionStats> {
+    const scopedKey = this.buildScopedSessionStatsKey(sessionId)
+
+    if (!includeRelations) {
+      const pendingFull = this.sessionStatsPendingFull.get(scopedKey)
+      if (pendingFull) return pendingFull
+      const pendingBasic = this.sessionStatsPendingBasic.get(scopedKey)
+      if (pendingBasic) return pendingBasic
+    } else {
+      const pendingFull = this.sessionStatsPendingFull.get(scopedKey)
+      if (pendingFull) return pendingFull
+    }
+
+    const targetMap = includeRelations ? this.sessionStatsPendingFull : this.sessionStatsPendingBasic
+    const pending = this.computeSessionExportStats(sessionId, selfIdentitySet, includeRelations)
+    targetMap.set(scopedKey, pending)
+    try {
+      return await pending
+    } finally {
+      targetMap.delete(scopedKey)
+    }
+  }
+
  /**
   * HTTP API 复用消息解析逻辑，确保和应用内展示一致。
   */
@@ -3600,6 +3912,14 @@ class ChatService {
      this.voiceTranscriptPending.clear()
    }

+    if (includeMessages || includeContacts) {
+      this.sessionStatsMemoryCache.clear()
+      this.sessionStatsPendingBasic.clear()
+      this.sessionStatsPendingFull.clear()
+      this.allGroupSessionIdsCache = null
+      this.sessionStatsCacheService.clearAll()
+    }
+
    for (const state of this.hardlinkCache.values()) {
      try {
        state.db?.close()
@@ -4036,9 +4356,11 @@ class ChatService {
    }
  }

-  async getExportSessionStats(sessionIds: string[]): Promise<{
+  async getExportSessionStats(sessionIds: string[], options: ExportSessionStatsOptions = {}): Promise<{
    success: boolean
    data?: Record<string, ExportSessionStats>
+    cache?: Record<string, ExportSessionStatsCacheMeta>
+    needsRefresh?: string[]
    error?: string
  }> {
    try {
@@ -4046,6 +4368,11 @@ class ChatService {
      if (!connectResult.success) {
        return { success: false, error: connectResult.error || '数据库未连接' }
      }
+      this.refreshSessionMessageCountCacheScope()
+
+      const includeRelations = options.includeRelations ?? true
+      const forceRefresh = options.forceRefresh === true
+      const allowStaleCache = options.allowStaleCache === true

      const normalizedSessionIds = Array.from(
        new Set(
@@ -4055,83 +4382,76 @@ class ChatService {
        )
      )
      if (normalizedSessionIds.length === 0) {
-        return { success: true, data: {} }
+        return { success: true, data: {}, cache: {} }
      }

-      const myWxid = this.configService.get('myWxid') || ''
-      const selfIdentitySet = new Set<string>(this.buildIdentityKeys(myWxid))
-
      const resultMap: Record<string, ExportSessionStats> = {}
-      await this.forEachWithConcurrency(normalizedSessionIds, 3, async (sessionId) => {
-        try {
-          resultMap[sessionId] = await this.collectSessionExportStats(sessionId, selfIdentitySet)
-        } catch {
-          resultMap[sessionId] = {
-            totalMessages: 0,
-            voiceMessages: 0,
-            imageMessages: 0,
-            videoMessages: 0,
-            emojiMessages: 0
-          }
-        }
-      })
+      const cacheMeta: Record<string, ExportSessionStatsCacheMeta> = {}
+      const needsRefreshSet = new Set<string>()
+      const pendingSessionIds: string[] = []
+      const now = Date.now()

-      const groupSessionIds = normalizedSessionIds.filter((id) => id.endsWith('@chatroom'))
-      const privateSessionIds = normalizedSessionIds.filter((id) => !id.endsWith('@chatroom'))
-
-      for (const privateId of privateSessionIds) {
-        resultMap[privateId] = {
-          ...resultMap[privateId],
-          privateMutualGroups: resultMap[privateId]?.privateMutualGroups ?? 0
-        }
-      }
-      for (const groupId of groupSessionIds) {
-        resultMap[groupId] = {
-          ...resultMap[groupId],
-          groupMyMessages: resultMap[groupId]?.groupMyMessages ?? 0,
-          groupActiveSpeakers: resultMap[groupId]?.groupActiveSpeakers ?? 0,
-          groupMemberCount: resultMap[groupId]?.groupMemberCount ?? 0,
-          groupMutualFriends: resultMap[groupId]?.groupMutualFriends ?? 0
-        }
-      }
-
-      if (groupSessionIds.length > 0) {
-        const memberCountsResult = await wcdbService.getGroupMemberCounts(groupSessionIds)
-        const memberCountMap = memberCountsResult.success && memberCountsResult.map ? memberCountsResult.map : {}
-        for (const groupId of groupSessionIds) {
-          resultMap[groupId] = {
-            ...resultMap[groupId],
-            groupMemberCount: typeof memberCountMap[groupId] === 'number' ? memberCountMap[groupId] : 0
-          }
-        }
-      }
-
-      if (groupSessionIds.length > 0) {
-        try {
-          const { privateMutualGroupMap, groupMutualFriendMap } = await this.buildGroupRelationStats(
-            groupSessionIds,
-            privateSessionIds,
-            selfIdentitySet
-          )
-
-          for (const privateId of privateSessionIds) {
-            resultMap[privateId] = {
-              ...resultMap[privateId],
-              privateMutualGroups: privateMutualGroupMap[privateId] || 0
+      for (const sessionId of normalizedSessionIds) {
+        if (!forceRefresh) {
+          const cachedResult = this.getSessionStatsCacheEntry(sessionId)
+          if (cachedResult && this.supportsRequestedRelation(cachedResult.entry, includeRelations)) {
+            const stale = now - cachedResult.entry.updatedAt > this.sessionStatsCacheTtlMs
+            if (!stale || allowStaleCache) {
+              resultMap[sessionId] = this.fromSessionStatsCacheStats(cachedResult.entry.stats)
+              cacheMeta[sessionId] = {
+                updatedAt: cachedResult.entry.updatedAt,
+                stale,
+                includeRelations: cachedResult.entry.includeRelations,
+                source: cachedResult.source
+              }
+              if (stale) {
+                needsRefreshSet.add(sessionId)
+              }
+              continue
            }
          }
-          for (const groupId of groupSessionIds) {
-            resultMap[groupId] = {
-              ...resultMap[groupId],
-              groupMutualFriends: groupMutualFriendMap[groupId] || 0
-            }
+          if (allowStaleCache) {
+            needsRefreshSet.add(sessionId)
+            continue
          }
-        } catch {
-          // 群成员关系统计失败时保留默认值，避免影响主列表展示
        }
+        pendingSessionIds.push(sessionId)
      }

-      return { success: true, data: resultMap }
+      if (pendingSessionIds.length > 0) {
+        const myWxid = this.configService.get('myWxid') || ''
+        const selfIdentitySet = new Set<string>(this.buildIdentityKeys(myWxid))
+        await this.forEachWithConcurrency(pendingSessionIds, 3, async (sessionId) => {
+          try {
+            const stats = await this.getOrComputeSessionExportStats(sessionId, includeRelations, selfIdentitySet)
+            resultMap[sessionId] = stats
+            const updatedAt = this.setSessionStatsCacheEntry(sessionId, stats, includeRelations)
+            cacheMeta[sessionId] = {
+              updatedAt,
+              stale: false,
+              includeRelations,
+              source: 'fresh'
+            }
+          } catch {
+            resultMap[sessionId] = this.buildEmptyExportSessionStats(sessionId, includeRelations)
+          }
+        })
+      }
+
+      const response: {
+        success: boolean
+        data?: Record<string, ExportSessionStats>
+        cache?: Record<string, ExportSessionStatsCacheMeta>
+        needsRefresh?: string[]
+      } = {
+        success: true,
+        data: resultMap,
+        cache: cacheMeta
+      }
+      if (needsRefreshSet.size > 0) {
+        response.needsRefresh = Array.from(needsRefreshSet)
+      }
+      return response
    } catch (e) {
      console.error('ChatService: 获取导出会话统计失败:', e)
      return { success: false, error: String(e) }
--- a/electron/services/exportService.ts
+++ b/electron/services/exportService.ts
@@ -70,6 +70,7 @@ const MESSAGE_TYPE_MAP: Record<number, number> = {

 export interface ExportOptions {
  format: 'chatlab' | 'chatlab-jsonl' | 'json' | 'arkme-json' | 'html' | 'txt' | 'excel' | 'weclone' | 'sql'
+  contentType?: 'text' | 'voice' | 'image' | 'video' | 'emoji'
  dateRange?: { start: number; end: number } | null
  senderUsername?: string
  fileNameSuffix?: string
@@ -104,6 +105,9 @@ interface MediaExportItem {
  posterDataUrl?: string
 }

+type MessageCollectMode = 'full' | 'text-fast' | 'media-fast'
+type MediaContentType = 'voice' | 'image' | 'video' | 'emoji'
+
 export interface ExportProgress {
  current: number
  total: number
@@ -159,6 +163,85 @@ class ExportService {
    return Math.max(1, Math.min(raw, max))
  }

+  private isMediaExportEnabled(options: ExportOptions): boolean {
+    return options.exportMedia === true &&
+      Boolean(options.exportImages || options.exportVoices || options.exportVideos || options.exportEmojis)
+  }
+
+  private isUnboundedDateRange(dateRange?: { start: number; end: number } | null): boolean {
+    if (!dateRange) return true
+    const start = Number.isFinite(dateRange.start) ? dateRange.start : 0
+    const end = Number.isFinite(dateRange.end) ? dateRange.end : 0
+    return start <= 0 && end <= 0
+  }
+
+  private shouldUseFastTextCollection(options: ExportOptions): boolean {
+    // 文本批量导出优先走轻量采集：不做媒体字段预提取，减少 CPU 与内存占用
+    return !this.isMediaExportEnabled(options)
+  }
+
+  private getMediaContentType(options: ExportOptions): MediaContentType | null {
+    const value = options.contentType
+    if (value === 'voice' || value === 'image' || value === 'video' || value === 'emoji') {
+      return value
+    }
+    return null
+  }
+
+  private isMediaContentBatchExport(options: ExportOptions): boolean {
+    return this.getMediaContentType(options) !== null
+  }
+
+  private getTargetMediaLocalTypes(options: ExportOptions): Set<number> {
+    const mediaContentType = this.getMediaContentType(options)
+    if (mediaContentType === 'voice') return new Set([34])
+    if (mediaContentType === 'image') return new Set([3])
+    if (mediaContentType === 'video') return new Set([43])
+    if (mediaContentType === 'emoji') return new Set([47])
+
+    const selected = new Set<number>()
+    if (options.exportImages) selected.add(3)
+    if (options.exportVoices) selected.add(34)
+    if (options.exportVideos) selected.add(43)
+    if (options.exportEmojis) selected.add(47)
+    return selected
+  }
+
+  private resolveCollectMode(options: ExportOptions): MessageCollectMode {
+    if (this.isMediaContentBatchExport(options)) {
+      return 'media-fast'
+    }
+    return this.shouldUseFastTextCollection(options) ? 'text-fast' : 'full'
+  }
+
+  private resolveCollectParams(options: ExportOptions): { mode: MessageCollectMode; targetMediaTypes?: Set<number> } {
+    const mode = this.resolveCollectMode(options)
+    if (mode === 'media-fast') {
+      const targetMediaTypes = this.getTargetMediaLocalTypes(options)
+      if (targetMediaTypes.size > 0) {
+        return { mode, targetMediaTypes }
+      }
+    }
+    return { mode }
+  }
+
+  private shouldDecodeMessageContentInFastMode(localType: number): boolean {
+    // 这些类型在文本导出里只需要占位符，无需解码完整 XML / 压缩内容
+    if (localType === 3 || localType === 34 || localType === 42 || localType === 43 || localType === 47) {
+      return false
+    }
+    return true
+  }
+
+  private shouldDecodeMessageContentInMediaMode(localType: number, targetMediaTypes: Set<number> | null): boolean {
+    if (!targetMediaTypes || !targetMediaTypes.has(localType)) return false
+    // 语音导出仅需要 localId 读取音频数据，不依赖 XML 内容
+    if (localType === 34) return false
+    // 图片/视频/表情可能需要从 XML 提取 md5/datName/cdnUrl
+    if (localType === 3 || localType === 43 || localType === 47) return true
+    return false
+  }
+
  private cleanAccountDirName(dirName: string): string {
    const trimmed = dirName.trim()
    if (!trimmed) return trimmed
@@ -1620,7 +1703,10 @@ class ExportService {
      }

      const msgId = String(msg.localId)
-      const fileName = `voice_${msgId}.wav`
+      const safeSession = this.cleanAccountDirName(sessionId)
+        .replace(/[^a-zA-Z0-9_-]/g, '_')
+        .slice(0, 48) || 'session'
+      const fileName = `voice_${safeSession}_${msgId}.wav`
      const destPath = path.join(voicesDir, fileName)

      // 如果已存在则跳过
@@ -1906,25 +1992,39 @@ class ExportService {
    sessionId: string,
    cleanedMyWxid: string,
    dateRange?: { start: number; end: number } | null,
-    senderUsernameFilter?: string
+    senderUsernameFilter?: string,
+    collectMode: MessageCollectMode = 'full',
+    targetMediaTypes?: Set<number>
  ): Promise<{ rows: any[]; memberSet: Map<string, { member: ChatLabMember; avatarUrl?: string }>; firstTime: number | null; lastTime: number | null }> {
    const rows: any[] = []
    const memberSet = new Map<string, { member: ChatLabMember; avatarUrl?: string }>()
    const senderSet = new Set<string>()
    let firstTime: number | null = null
    let lastTime: number | null = null
+    const mediaTypeFilter = collectMode === 'media-fast' && targetMediaTypes && targetMediaTypes.size > 0
+      ? targetMediaTypes
+      : null

    // 修复时间范围：0 表示不限制，而不是时间戳 0
    const beginTime = dateRange?.start || 0
    const endTime = dateRange?.end && dateRange.end > 0 ? dateRange.end : 0
    
-    const cursor = await wcdbService.openMessageCursor(
-      sessionId,
-      500,
-      true,
-      beginTime,
-      endTime
-    )
+    const batchSize = (collectMode === 'text-fast' || collectMode === 'media-fast') ? 2000 : 500
+    const cursor = collectMode === 'media-fast'
+      ? await wcdbService.openMessageCursorLite(
+        sessionId,
+        batchSize,
+        true,
+        beginTime,
+        endTime
+      )
+      : await wcdbService.openMessageCursor(
+        sessionId,
+        batchSize,
+        true,
+        beginTime,
+        endTime
+      )
    if (!cursor.success || !cursor.cursor) {
      console.error(`[Export] 打开游标失败: ${cursor.error || '未知错误'}`)
      return { rows, memberSet, firstTime, lastTime }
@@ -1950,8 +2050,16 @@ class ExportService {
            if (createTime < dateRange.start || createTime > dateRange.end) continue
          }

-          const content = this.decodeMessageContent(row.message_content, row.compress_content)
          const localType = parseInt(row.local_type || row.type || '1', 10)
+          if (mediaTypeFilter && !mediaTypeFilter.has(localType)) {
+            continue
+          }
+          const shouldDecodeContent = collectMode === 'full'
+            || (collectMode === 'text-fast' && this.shouldDecodeMessageContentInFastMode(localType))
+            || (collectMode === 'media-fast' && this.shouldDecodeMessageContentInMediaMode(localType, mediaTypeFilter))
+          const content = shouldDecodeContent
+            ? this.decodeMessageContent(row.message_content, row.compress_content)
+            : ''
          const senderUsername = row.sender_username || ''
          const isSendRaw = row.computed_is_send ?? row.is_send ?? '0'
          const isSend = parseInt(isSendRaw, 10) === 1
@@ -1987,7 +2095,7 @@ class ExportService {
          }
          senderSet.add(actualSender)

-          // 提取媒体相关字段
+          // 提取媒体相关字段（轻量模式下跳过）
          let imageMd5: string | undefined
          let imageDatName: string | undefined
          let emojiCdnUrl: string | undefined
@@ -1995,22 +2103,31 @@ class ExportService {
          let videoMd5: string | undefined
          let chatRecordList: any[] | undefined

-          if (localType === 3 && content) {
-            // 图片消息
-            imageMd5 = this.extractImageMd5(content)
-            imageDatName = this.extractImageDatName(content)
-          } else if (localType === 47 && content) {
-            // 动画表情
-            emojiCdnUrl = this.extractEmojiUrl(content)
-            emojiMd5 = this.extractEmojiMd5(content)
-          } else if (localType === 43 && content) {
-            // 视频消息
-            videoMd5 = this.extractVideoMd5(content)
-          } else if (localType === 49 && content) {
-            // 检查是否是聊天记录消息（type=19）
-            const xmlType = this.extractXmlValue(content, 'type')
-            if (xmlType === '19') {
-              chatRecordList = this.parseChatHistory(content)
+          if (collectMode === 'full' || collectMode === 'media-fast') {
+            // 优先复用游标返回的字段，缺失时再回退到 XML 解析。
+            imageMd5 = String(row.image_md5 || row.imageMd5 || '').trim() || undefined
+            imageDatName = String(row.image_dat_name || row.imageDatName || '').trim() || undefined
+            emojiCdnUrl = String(row.emoji_cdn_url || row.emojiCdnUrl || '').trim() || undefined
+            emojiMd5 = String(row.emoji_md5 || row.emojiMd5 || '').trim() || undefined
+            videoMd5 = String(row.video_md5 || row.videoMd5 || '').trim() || undefined
+
+            if (localType === 3 && content) {
+              // 图片消息
+              imageMd5 = imageMd5 || this.extractImageMd5(content)
+              imageDatName = imageDatName || this.extractImageDatName(content)
+            } else if (localType === 47 && content) {
+              // 动画表情
+              emojiCdnUrl = emojiCdnUrl || this.extractEmojiUrl(content)
+              emojiMd5 = emojiMd5 || this.extractEmojiMd5(content)
+            } else if (localType === 43 && content) {
+              // 视频消息
+              videoMd5 = videoMd5 || this.extractVideoMd5(content)
+            } else if (collectMode === 'full' && localType === 49 && content) {
+              // 检查是否是聊天记录消息（type=19）
+              const xmlType = this.extractXmlValue(content, 'type')
+              if (xmlType === '19') {
+                chatRecordList = this.parseChatHistory(content)
+              }
            }
          }

@@ -2045,6 +2162,10 @@ class ExportService {
      }
    }

+    if (collectMode === 'media-fast' && mediaTypeFilter && rows.length > 0) {
+      await this.backfillMediaFieldsFromMessageDetail(sessionId, rows, mediaTypeFilter)
+    }
+
    if (senderSet.size > 0) {
      const usernames = Array.from(senderSet)
      const [nameResult, avatarResult] = await Promise.all([
@@ -2072,6 +2193,60 @@ class ExportService {
    return { rows, memberSet, firstTime, lastTime }
  }

+  private async backfillMediaFieldsFromMessageDetail(
+    sessionId: string,
+    rows: any[],
+    targetMediaTypes: Set<number>
+  ): Promise<void> {
+    const needsBackfill = rows.filter((msg) => {
+      if (!targetMediaTypes.has(msg.localType)) return false
+      if (msg.localType === 3) return !msg.imageMd5 && !msg.imageDatName
+      if (msg.localType === 47) return !msg.emojiMd5 && !msg.emojiCdnUrl
+      if (msg.localType === 43) return !msg.videoMd5
+      return false
+    })
+    if (needsBackfill.length === 0) return
+
+    const DETAIL_CONCURRENCY = 6
+    await parallelLimit(needsBackfill, DETAIL_CONCURRENCY, async (msg) => {
+      const localId = Number(msg.localId || 0)
+      if (!Number.isFinite(localId) || localId <= 0) return
+
+      try {
+        const detail = await wcdbService.getMessageById(sessionId, localId)
+        if (!detail.success || !detail.message) return
+
+        const row = detail.message as any
+        const rawMessageContent = row.message_content ?? row.messageContent ?? row.msg_content ?? row.msgContent ?? ''
+        const rawCompressContent = row.compress_content ?? row.compressContent ?? row.msg_compress_content ?? row.msgCompressContent ?? ''
+        const content = this.decodeMessageContent(rawMessageContent, rawCompressContent)
+
+        if (msg.localType === 3) {
+          const imageMd5 = String(row.image_md5 || row.imageMd5 || '').trim() || this.extractImageMd5(content)
+          const imageDatName = String(row.image_dat_name || row.imageDatName || '').trim() || this.extractImageDatName(content)
+          if (imageMd5) msg.imageMd5 = imageMd5
+          if (imageDatName) msg.imageDatName = imageDatName
+          return
+        }
+
+        if (msg.localType === 47) {
+          const emojiMd5 = String(row.emoji_md5 || row.emojiMd5 || '').trim() || this.extractEmojiMd5(content)
+          const emojiCdnUrl = String(row.emoji_cdn_url || row.emojiCdnUrl || '').trim() || this.extractEmojiUrl(content)
+          if (emojiMd5) msg.emojiMd5 = emojiMd5
+          if (emojiCdnUrl) msg.emojiCdnUrl = emojiCdnUrl
+          return
+        }
+
+        if (msg.localType === 43) {
+          const videoMd5 = String(row.video_md5 || row.videoMd5 || '').trim() || this.extractVideoMd5(content)
+          if (videoMd5) msg.videoMd5 = videoMd5
+        }
+      } catch (error) {
+        // 详情补取失败时保持降级导出（占位符），避免中断整批任务。
+      }
+    })
+  }
+
  // 补齐群成员，避免只导出发言者导致头像缺失
  private async mergeGroupMembers(
    chatroomId: string,
@@ -2631,7 +2806,15 @@ class ExportService {
        phase: 'preparing'
      })

-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collectParams = this.resolveCollectParams(options)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        collectParams.mode,
+        collectParams.targetMediaTypes
+      )
      const allMessages = collected.rows

      // 如果没有消息,不创建文件
@@ -3026,7 +3209,15 @@ class ExportService {
        phase: 'preparing'
      })

-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collectParams = this.resolveCollectParams(options)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        collectParams.mode,
+        collectParams.targetMediaTypes
+      )

      // 如果没有消息,不创建文件
      if (collected.rows.length === 0) {
@@ -3600,7 +3791,15 @@ class ExportService {
        phase: 'preparing'
      })

-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collectParams = this.resolveCollectParams(options)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        collectParams.mode,
+        collectParams.targetMediaTypes
+      )

      // 如果没有消息,不创建文件
      if (collected.rows.length === 0) {
@@ -4087,7 +4286,15 @@ class ExportService {
        phase: 'preparing'
      })

-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collectParams = this.resolveCollectParams(options)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        collectParams.mode,
+        collectParams.targetMediaTypes
+      )

      // 如果没有消息,不创建文件
      if (collected.rows.length === 0) {
@@ -4367,7 +4574,15 @@ class ExportService {
        phase: 'preparing'
      })

-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collectParams = this.resolveCollectParams(options)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        collectParams.mode,
+        collectParams.targetMediaTypes
+      )
      if (collected.rows.length === 0) {
        return { success: false, error: '该会话在指定时间范围内没有消息' }
      }
@@ -4709,7 +4924,15 @@ class ExportService {
        await this.ensureVoiceModel(onProgress)
      }

-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collectParams = this.resolveCollectParams(options)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        collectParams.mode,
+        collectParams.targetMediaTypes
+      )

      // 如果没有消息,不创建文件
      if (collected.rows.length === 0) {
@@ -5187,7 +5410,13 @@ class ExportService {

    for (const sessionId of sessionIds) {
      const sessionInfo = await this.getContactInfo(sessionId)
-      const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange, options.senderUsername)
+      const collected = await this.collectMessages(
+        sessionId,
+        cleanedMyWxid,
+        options.dateRange,
+        options.senderUsername,
+        'text-fast'
+      )
      const msgs = collected.rows
      const voiceMsgs = msgs.filter(m => m.localType === 34)
      const mediaMsgs = msgs.filter(m => {
@@ -5264,8 +5493,12 @@ class ExportService {
        return { success: false, successCount: 0, failCount: sessionIds.length, error: conn.error }
      }

-      const exportMediaEnabled = options.exportMedia === true &&
-        Boolean(options.exportImages || options.exportVoices || options.exportVideos || options.exportEmojis)
+      const effectiveOptions: ExportOptions = this.isMediaContentBatchExport(options)
+        ? { ...options, exportVoiceAsText: false }
+        : options
+
+      const exportMediaEnabled = effectiveOptions.exportMedia === true &&
+        Boolean(effectiveOptions.exportImages || effectiveOptions.exportVoices || effectiveOptions.exportVideos || effectiveOptions.exportEmojis)
      const rawWriteLayout = this.configService.get('exportWriteLayout')
      const writeLayout = rawWriteLayout === 'A' || rawWriteLayout === 'B' || rawWriteLayout === 'C'
        ? rawWriteLayout
@@ -5277,17 +5510,29 @@ class ExportService {
        fs.mkdirSync(exportBaseDir, { recursive: true })
      }
      const sessionLayout = exportMediaEnabled
-        ? (options.sessionLayout ?? 'per-session')
+        ? (effectiveOptions.sessionLayout ?? 'per-session')
        : 'shared'
      let completedCount = 0
      const defaultConcurrency = exportMediaEnabled ? 2 : 4
-      const rawConcurrency = typeof options.exportConcurrency === 'number'
-        ? Math.floor(options.exportConcurrency)
+      const rawConcurrency = typeof effectiveOptions.exportConcurrency === 'number'
+        ? Math.floor(effectiveOptions.exportConcurrency)
        : defaultConcurrency
      const clampedConcurrency = Math.max(1, Math.min(rawConcurrency, 6))
-      const sessionConcurrency = (exportMediaEnabled && sessionLayout === 'shared')
-        ? 1
-        : clampedConcurrency
+      const sessionConcurrency = clampedConcurrency
+      const emptySessionIds = new Set<string>()
+      const canFastSkipEmptySessions = this.isUnboundedDateRange(effectiveOptions.dateRange) &&
+        !String(effectiveOptions.senderUsername || '').trim()
+      if (canFastSkipEmptySessions && sessionIds.length > 0) {
+        const countsResult = await wcdbService.getMessageCounts(sessionIds)
+        if (countsResult.success && countsResult.counts) {
+          for (const sessionId of sessionIds) {
+            const count = countsResult.counts[sessionId]
+            if (typeof count === 'number' && Number.isFinite(count) && count <= 0) {
+              emptySessionIds.add(sessionId)
+            }
+          }
+        }
+      }
      const queue = [...sessionIds]
      let pauseRequested = false
      let stopRequested = false
@@ -5295,6 +5540,21 @@ class ExportService {
      const runOne = async (sessionId: string) => {
        const sessionInfo = await this.getContactInfo(sessionId)

+        if (emptySessionIds.has(sessionId)) {
+          failCount++
+          failedSessionIds.push(sessionId)
+          completedCount++
+          onProgress?.({
+            current: completedCount,
+            total: sessionIds.length,
+            currentSession: sessionInfo.displayName,
+            currentSessionId: sessionId,
+            phase: 'exporting',
+            phaseLabel: '该会话没有消息，已跳过'
+          })
+          return
+        }
+
        const sessionProgress = (progress: ExportProgress) => {
          onProgress?.({
            ...progress,
@@ -5314,7 +5574,7 @@ class ExportService {

        const sanitizeName = (value: string) => value.replace(/[<>:"\/\\|?*]/g, '_').replace(/\.+$/, '').trim()
        const baseName = sanitizeName(sessionInfo.displayName || sessionId) || sanitizeName(sessionId) || 'session'
-        const suffix = sanitizeName(options.fileNameSuffix || '')
+        const suffix = sanitizeName(effectiveOptions.fileNameSuffix || '')
        const safeName = suffix ? `${baseName}_${suffix}` : baseName
        const fileNameWithPrefix = `${await this.getSessionFilePrefix(sessionId)}${safeName}`
        const useSessionFolder = sessionLayout === 'per-session'
@@ -5325,28 +5585,28 @@ class ExportService {
        }

        let ext = '.json'
-        if (options.format === 'chatlab-jsonl') ext = '.jsonl'
-        else if (options.format === 'excel') ext = '.xlsx'
-        else if (options.format === 'txt') ext = '.txt'
-        else if (options.format === 'weclone') ext = '.csv'
-        else if (options.format === 'html') ext = '.html'
+        if (effectiveOptions.format === 'chatlab-jsonl') ext = '.jsonl'
+        else if (effectiveOptions.format === 'excel') ext = '.xlsx'
+        else if (effectiveOptions.format === 'txt') ext = '.txt'
+        else if (effectiveOptions.format === 'weclone') ext = '.csv'
+        else if (effectiveOptions.format === 'html') ext = '.html'
        const outputPath = path.join(sessionDir, `${fileNameWithPrefix}${ext}`)

        let result: { success: boolean; error?: string }
-        if (options.format === 'json' || options.format === 'arkme-json') {
-          result = await this.exportSessionToDetailedJson(sessionId, outputPath, options, sessionProgress)
-        } else if (options.format === 'chatlab' || options.format === 'chatlab-jsonl') {
-          result = await this.exportSessionToChatLab(sessionId, outputPath, options, sessionProgress)
-        } else if (options.format === 'excel') {
-          result = await this.exportSessionToExcel(sessionId, outputPath, options, sessionProgress)
-        } else if (options.format === 'txt') {
-          result = await this.exportSessionToTxt(sessionId, outputPath, options, sessionProgress)
-        } else if (options.format === 'weclone') {
-          result = await this.exportSessionToWeCloneCsv(sessionId, outputPath, options, sessionProgress)
-        } else if (options.format === 'html') {
-          result = await this.exportSessionToHtml(sessionId, outputPath, options, sessionProgress)
+        if (effectiveOptions.format === 'json' || effectiveOptions.format === 'arkme-json') {
+          result = await this.exportSessionToDetailedJson(sessionId, outputPath, effectiveOptions, sessionProgress)
+        } else if (effectiveOptions.format === 'chatlab' || effectiveOptions.format === 'chatlab-jsonl') {
+          result = await this.exportSessionToChatLab(sessionId, outputPath, effectiveOptions, sessionProgress)
+        } else if (effectiveOptions.format === 'excel') {
+          result = await this.exportSessionToExcel(sessionId, outputPath, effectiveOptions, sessionProgress)
+        } else if (effectiveOptions.format === 'txt') {
+          result = await this.exportSessionToTxt(sessionId, outputPath, effectiveOptions, sessionProgress)
+        } else if (effectiveOptions.format === 'weclone') {
+          result = await this.exportSessionToWeCloneCsv(sessionId, outputPath, effectiveOptions, sessionProgress)
+        } else if (effectiveOptions.format === 'html') {
+          result = await this.exportSessionToHtml(sessionId, outputPath, effectiveOptions, sessionProgress)
        } else {
-          result = { success: false, error: `不支持的格式: ${options.format}` }
+          result = { success: false, error: `不支持的格式: ${effectiveOptions.format}` }
        }

        if (result.success) {
--- a/electron/services/groupAnalyticsService.ts
+++ b/electron/services/groupAnalyticsService.ts
@@ -24,6 +24,11 @@ export interface GroupMember {
  isOwner?: boolean
 }

+export interface GroupMembersPanelEntry extends GroupMember {
+  isFriend: boolean
+  messageCount: number
+}
+
 export interface GroupMessageRank {
  member: GroupMember
  messageCount: number
@@ -44,8 +49,26 @@ export interface GroupMediaStats {
  total: number
 }

+interface GroupMemberContactInfo {
+  remark: string
+  nickName: string
+  alias: string
+  username: string
+  userName: string
+  encryptUsername: string
+  encryptUserName: string
+  localType: number
+}
+
 class GroupAnalyticsService {
  private configService: ConfigService
+  private readonly groupMembersPanelCacheTtlMs = 10 * 60 * 1000
+  private readonly groupMembersPanelCache = new Map<string, { updatedAt: number; data: GroupMembersPanelEntry[] }>()
+  private readonly groupMembersPanelInFlight = new Map<
+    string,
+    Promise<{ success: boolean; data?: GroupMembersPanelEntry[]; error?: string; fromCache?: boolean; updatedAt?: number }>
+  >()
+  private readonly friendExcludeNames = new Set(['medianote', 'floatbottle', 'qmessage', 'qqmail', 'fmessage'])

  constructor() {
    this.configService = new ConfigService()
@@ -419,6 +442,166 @@ class GroupAnalyticsService {
    return Array.from(set)
  }

+  private toNonNegativeInteger(value: unknown): number {
+    const parsed = Number(value)
+    if (!Number.isFinite(parsed)) return 0
+    return Math.max(0, Math.floor(parsed))
+  }
+
+  private pickStringField(row: Record<string, unknown>, keys: string[]): string {
+    for (const key of keys) {
+      const value = row[key]
+      if (value == null) continue
+      const text = String(value).trim()
+      if (text) return text
+    }
+    return ''
+  }
+
+  private pickIntegerField(row: Record<string, unknown>, keys: string[], fallback: number = 0): number {
+    for (const key of keys) {
+      const value = row[key]
+      if (value == null || value === '') continue
+      const parsed = Number(value)
+      if (Number.isFinite(parsed)) return Math.floor(parsed)
+    }
+    return fallback
+  }
+
+  private buildGroupMembersPanelCacheKey(chatroomId: string): string {
+    const dbPath = String(this.configService.get('dbPath') || '').trim()
+    const wxid = this.cleanAccountDirName(String(this.configService.get('myWxid') || '').trim())
+    return `${dbPath}::${wxid}::${chatroomId}`
+  }
+
+  private pruneGroupMembersPanelCache(maxEntries: number = 80): void {
+    if (this.groupMembersPanelCache.size <= maxEntries) return
+    const entries = Array.from(this.groupMembersPanelCache.entries())
+      .sort((a, b) => a[1].updatedAt - b[1].updatedAt)
+    const removeCount = this.groupMembersPanelCache.size - maxEntries
+    for (let i = 0; i < removeCount; i += 1) {
+      this.groupMembersPanelCache.delete(entries[i][0])
+    }
+  }
+
+  private async buildGroupMemberContactLookup(usernames: string[]): Promise<Map<string, GroupMemberContactInfo>> {
+    const lookup = new Map<string, GroupMemberContactInfo>()
+    const candidates = this.buildIdCandidates(usernames)
+    if (candidates.length === 0) return lookup
+
+    const batchSize = 200
+    for (let i = 0; i < candidates.length; i += batchSize) {
+      const batch = candidates.slice(i, i + batchSize)
+      if (batch.length === 0) continue
+
+      const inList = batch.map((username) => `'${username.replace(/'/g, "''")}'`).join(',')
+      const sql = `SELECT * FROM contact WHERE username IN (${inList})`
+      const result = await wcdbService.execQuery('contact', null, sql)
+      if (!result.success || !result.rows) continue
+
+      for (const row of result.rows as Record<string, unknown>[]) {
+        const contact: GroupMemberContactInfo = {
+          remark: this.pickStringField(row, ['remark', 'WCDB_CT_remark']),
+          nickName: this.pickStringField(row, ['nick_name', 'nickName', 'WCDB_CT_nick_name']),
+          alias: this.pickStringField(row, ['alias', 'WCDB_CT_alias']),
+          username: this.pickStringField(row, ['username', 'WCDB_CT_username']),
+          userName: this.pickStringField(row, ['user_name', 'userName', 'WCDB_CT_user_name']),
+          encryptUsername: this.pickStringField(row, ['encrypt_username', 'encryptUsername', 'WCDB_CT_encrypt_username']),
+          encryptUserName: this.pickStringField(row, ['encrypt_user_name', 'encryptUserName', 'WCDB_CT_encrypt_user_name']),
+          localType: this.pickIntegerField(row, ['local_type', 'localType', 'WCDB_CT_local_type'], 0)
+        }
+        const lookupKeys = this.buildIdCandidates([
+          contact.username,
+          contact.userName,
+          contact.encryptUsername,
+          contact.encryptUserName,
+          contact.alias
+        ])
+        for (const key of lookupKeys) {
+          const normalized = key.toLowerCase()
+          if (!lookup.has(normalized)) {
+            lookup.set(normalized, contact)
+          }
+        }
+      }
+    }
+    return lookup
+  }
+
+  private resolveContactByCandidates(
+    lookup: Map<string, GroupMemberContactInfo>,
+    candidates: Array<string | undefined | null>
+  ): GroupMemberContactInfo | undefined {
+    const ids = this.buildIdCandidates(candidates)
+    for (const id of ids) {
+      const hit = lookup.get(id.toLowerCase())
+      if (hit) return hit
+    }
+    return undefined
+  }
+
+  private async buildGroupMessageCountLookup(chatroomId: string): Promise<Map<string, number>> {
+    const lookup = new Map<string, number>()
+    const result = await wcdbService.getGroupStats(chatroomId, 0, 0)
+    if (!result.success || !result.data) return lookup
+
+    const sessionData = result.data?.sessions?.[chatroomId]
+    if (!sessionData || !sessionData.senders) return lookup
+
+    const idMap = result.data.idMap || {}
+    for (const [senderId, rawCount] of Object.entries(sessionData.senders as Record<string, number>)) {
+      const username = String(idMap[senderId] || senderId || '').trim()
+      if (!username) continue
+      const count = this.toNonNegativeInteger(rawCount)
+      const keys = this.buildIdCandidates([username])
+      for (const key of keys) {
+        const normalized = key.toLowerCase()
+        const prev = lookup.get(normalized) || 0
+        if (count > prev) {
+          lookup.set(normalized, count)
+        }
+      }
+    }
+    return lookup
+  }
+
+  private resolveMessageCountByCandidates(
+    lookup: Map<string, number>,
+    candidates: Array<string | undefined | null>
+  ): number {
+    let maxCount = 0
+    const ids = this.buildIdCandidates(candidates)
+    for (const id of ids) {
+      const count = lookup.get(id.toLowerCase())
+      if (typeof count === 'number' && count > maxCount) {
+        maxCount = count
+      }
+    }
+    return maxCount
+  }
+
+  private isFriendMember(wxid: string, contact?: GroupMemberContactInfo): boolean {
+    const normalizedWxid = String(wxid || '').trim().toLowerCase()
+    if (!normalizedWxid) return false
+    if (normalizedWxid.includes('@chatroom') || normalizedWxid.startsWith('gh_')) return false
+    if (this.friendExcludeNames.has(normalizedWxid)) return false
+    if (!contact) return false
+    return contact.localType === 1
+  }
+
+  private sortGroupMembersPanelEntries(members: GroupMembersPanelEntry[]): GroupMembersPanelEntry[] {
+    return members.sort((a, b) => {
+      const ownerDiff = Number(Boolean(b.isOwner)) - Number(Boolean(a.isOwner))
+      if (ownerDiff !== 0) return ownerDiff
+
+      const friendDiff = Number(Boolean(b.isFriend)) - Number(Boolean(a.isFriend))
+      if (friendDiff !== 0) return friendDiff
+
+      if (a.messageCount !== b.messageCount) return b.messageCount - a.messageCount
+      return a.displayName.localeCompare(b.displayName, 'zh-Hans-CN')
+    })
+  }
+
  private resolveGroupNicknameByCandidates(groupNicknames: Map<string, string>, candidates: string[]): string {
    const idCandidates = this.buildIdCandidates(candidates)
    if (idCandidates.length === 0) return ''
@@ -606,6 +789,138 @@ class GroupAnalyticsService {
    }
  }

+  private async loadGroupMembersPanelDataFresh(
+    chatroomId: string
+  ): Promise<{ success: boolean; data?: GroupMembersPanelEntry[]; error?: string }> {
+    const membersResult = await wcdbService.getGroupMembers(chatroomId)
+    if (!membersResult.success || !membersResult.members) {
+      return { success: false, error: membersResult.error || '获取群成员失败' }
+    }
+
+    const members = membersResult.members as Array<{
+      username: string
+      avatarUrl?: string
+      originalName?: string
+      [key: string]: unknown
+    }>
+    if (members.length === 0) return { success: true, data: [] }
+
+    const usernames = members
+      .map((member) => String(member.username || '').trim())
+      .filter(Boolean)
+    if (usernames.length === 0) return { success: true, data: [] }
+
+    const displayNamesPromise = wcdbService.getDisplayNames(usernames)
+    const contactLookupPromise = this.buildGroupMemberContactLookup(usernames)
+    const ownerPromise = this.detectGroupOwnerUsername(chatroomId, members)
+    const messageCountLookupPromise = this.buildGroupMessageCountLookup(chatroomId)
+
+    const [displayNames, contactLookup, ownerUsername, messageCountLookup] = await Promise.all([
+      displayNamesPromise,
+      contactLookupPromise,
+      ownerPromise,
+      messageCountLookupPromise
+    ])
+
+    const nicknameCandidates = this.buildIdCandidates([
+      ...members.map((member) => member.username),
+      ...members.map((member) => member.originalName),
+      ...Array.from(contactLookup.values()).map((contact) => contact?.username),
+      ...Array.from(contactLookup.values()).map((contact) => contact?.userName),
+      ...Array.from(contactLookup.values()).map((contact) => contact?.encryptUsername),
+      ...Array.from(contactLookup.values()).map((contact) => contact?.encryptUserName),
+      ...Array.from(contactLookup.values()).map((contact) => contact?.alias)
+    ])
+    const groupNicknames = await this.getGroupNicknamesForRoom(chatroomId, nicknameCandidates)
+    const myWxid = this.cleanAccountDirName(this.configService.get('myWxid') || '')
+
+    const data: GroupMembersPanelEntry[] = members
+      .map((member) => {
+        const wxid = String(member.username || '').trim()
+        if (!wxid) return null
+
+        const contact = this.resolveContactByCandidates(contactLookup, [wxid, member.originalName])
+        const nickname = contact?.nickName || ''
+        const remark = contact?.remark || ''
+        const alias = contact?.alias || ''
+        const normalizedWxid = this.cleanAccountDirName(wxid)
+        const lookupCandidates = this.buildIdCandidates([
+          wxid,
+          member.originalName as string | undefined,
+          contact?.username,
+          contact?.userName,
+          contact?.encryptUsername,
+          contact?.encryptUserName,
+          alias
+        ])
+        if (normalizedWxid === myWxid) {
+          lookupCandidates.push(myWxid)
+        }
+        const groupNickname = this.resolveGroupNicknameByCandidates(groupNicknames, lookupCandidates)
+        const displayName = displayNames.success && displayNames.map ? (displayNames.map[wxid] || wxid) : wxid
+
+        return {
+          username: wxid,
+          displayName,
+          nickname,
+          alias,
+          remark,
+          groupNickname,
+          avatarUrl: member.avatarUrl,
+          isOwner: Boolean(ownerUsername && ownerUsername === wxid),
+          isFriend: this.isFriendMember(wxid, contact),
+          messageCount: this.resolveMessageCountByCandidates(messageCountLookup, lookupCandidates)
+        }
+      })
+      .filter((member): member is GroupMembersPanelEntry => Boolean(member))
+
+    return { success: true, data: this.sortGroupMembersPanelEntries(data) }
+  }
+
+  async getGroupMembersPanelData(
+    chatroomId: string,
+    forceRefresh: boolean = false
+  ): Promise<{ success: boolean; data?: GroupMembersPanelEntry[]; error?: string; fromCache?: boolean; updatedAt?: number }> {
+    try {
+      const normalizedChatroomId = String(chatroomId || '').trim()
+      if (!normalizedChatroomId) return { success: false, error: '群聊ID不能为空' }
+
+      const cacheKey = this.buildGroupMembersPanelCacheKey(normalizedChatroomId)
+      const now = Date.now()
+      const cached = this.groupMembersPanelCache.get(cacheKey)
+      if (!forceRefresh && cached && now - cached.updatedAt < this.groupMembersPanelCacheTtlMs) {
+        return { success: true, data: cached.data, fromCache: true, updatedAt: cached.updatedAt }
+      }
+
+      if (!forceRefresh) {
+        const pending = this.groupMembersPanelInFlight.get(cacheKey)
+        if (pending) return pending
+      }
+
+      const requestPromise = (async () => {
+        const conn = await this.ensureConnected()
+        if (!conn.success) return { success: false, error: conn.error }
+
+        const fresh = await this.loadGroupMembersPanelDataFresh(normalizedChatroomId)
+        if (!fresh.success || !fresh.data) {
+          return { success: false, error: fresh.error || '获取群成员面板数据失败' }
+        }
+
+        const updatedAt = Date.now()
+        this.groupMembersPanelCache.set(cacheKey, { updatedAt, data: fresh.data })
+        this.pruneGroupMembersPanelCache()
+        return { success: true, data: fresh.data, fromCache: false, updatedAt }
+      })().finally(() => {
+        this.groupMembersPanelInFlight.delete(cacheKey)
+      })
+
+      this.groupMembersPanelInFlight.set(cacheKey, requestPromise)
+      return await requestPromise
+    } catch (e) {
+      return { success: false, error: String(e) }
+    }
+  }
+
  async getGroupMembers(chatroomId: string): Promise<{ success: boolean; data?: GroupMember[]; error?: string }> {
    try {
      const conn = await this.ensureConnected()
--- a/electron/services/sessionStatsCacheService.ts
+++ b/electron/services/sessionStatsCacheService.ts
@@ -0,0 +1,276 @@
+import { join, dirname } from 'path'
+import { existsSync, mkdirSync, readFileSync, writeFileSync, rmSync } from 'fs'
+import { ConfigService } from './config'
+
+const CACHE_VERSION = 1
+const MAX_SESSION_ENTRIES_PER_SCOPE = 2000
+const MAX_SCOPE_ENTRIES = 12
+
+export interface SessionStatsCacheStats {
+  totalMessages: number
+  voiceMessages: number
+  imageMessages: number
+  videoMessages: number
+  emojiMessages: number
+  firstTimestamp?: number
+  lastTimestamp?: number
+  privateMutualGroups?: number
+  groupMemberCount?: number
+  groupMyMessages?: number
+  groupActiveSpeakers?: number
+  groupMutualFriends?: number
+}
+
+export interface SessionStatsCacheEntry {
+  updatedAt: number
+  includeRelations: boolean
+  stats: SessionStatsCacheStats
+}
+
+interface SessionStatsScopeMap {
+  [sessionId: string]: SessionStatsCacheEntry
+}
+
+interface SessionStatsCacheStore {
+  version: number
+  scopes: Record<string, SessionStatsScopeMap>
+}
+
+function toNonNegativeInt(value: unknown): number | undefined {
+  if (typeof value !== 'number' || !Number.isFinite(value)) return undefined
+  return Math.max(0, Math.floor(value))
+}
+
+function normalizeStats(raw: unknown): SessionStatsCacheStats | null {
+  if (!raw || typeof raw !== 'object') return null
+  const source = raw as Record<string, unknown>
+
+  const totalMessages = toNonNegativeInt(source.totalMessages)
+  const voiceMessages = toNonNegativeInt(source.voiceMessages)
+  const imageMessages = toNonNegativeInt(source.imageMessages)
+  const videoMessages = toNonNegativeInt(source.videoMessages)
+  const emojiMessages = toNonNegativeInt(source.emojiMessages)
+
+  if (
+    totalMessages === undefined ||
+    voiceMessages === undefined ||
+    imageMessages === undefined ||
+    videoMessages === undefined ||
+    emojiMessages === undefined
+  ) {
+    return null
+  }
+
+  const normalized: SessionStatsCacheStats = {
+    totalMessages,
+    voiceMessages,
+    imageMessages,
+    videoMessages,
+    emojiMessages
+  }
+
+  const firstTimestamp = toNonNegativeInt(source.firstTimestamp)
+  if (firstTimestamp !== undefined) normalized.firstTimestamp = firstTimestamp
+
+  const lastTimestamp = toNonNegativeInt(source.lastTimestamp)
+  if (lastTimestamp !== undefined) normalized.lastTimestamp = lastTimestamp
+
+  const privateMutualGroups = toNonNegativeInt(source.privateMutualGroups)
+  if (privateMutualGroups !== undefined) normalized.privateMutualGroups = privateMutualGroups
+
+  const groupMemberCount = toNonNegativeInt(source.groupMemberCount)
+  if (groupMemberCount !== undefined) normalized.groupMemberCount = groupMemberCount
+
+  const groupMyMessages = toNonNegativeInt(source.groupMyMessages)
+  if (groupMyMessages !== undefined) normalized.groupMyMessages = groupMyMessages
+
+  const groupActiveSpeakers = toNonNegativeInt(source.groupActiveSpeakers)
+  if (groupActiveSpeakers !== undefined) normalized.groupActiveSpeakers = groupActiveSpeakers
+
+  const groupMutualFriends = toNonNegativeInt(source.groupMutualFriends)
+  if (groupMutualFriends !== undefined) normalized.groupMutualFriends = groupMutualFriends
+
+  return normalized
+}
+
+function normalizeEntry(raw: unknown): SessionStatsCacheEntry | null {
+  if (!raw || typeof raw !== 'object') return null
+  const source = raw as Record<string, unknown>
+  const updatedAt = toNonNegativeInt(source.updatedAt)
+  const includeRelations = typeof source.includeRelations === 'boolean' ? source.includeRelations : false
+  const stats = normalizeStats(source.stats)
+
+  if (updatedAt === undefined || !stats) {
+    return null
+  }
+
+  return {
+    updatedAt,
+    includeRelations,
+    stats
+  }
+}
+
+export class SessionStatsCacheService {
+  private readonly cacheFilePath: string
+  private store: SessionStatsCacheStore = {
+    version: CACHE_VERSION,
+    scopes: {}
+  }
+
+  constructor(cacheBasePath?: string) {
+    const basePath = cacheBasePath && cacheBasePath.trim().length > 0
+      ? cacheBasePath
+      : ConfigService.getInstance().getCacheBasePath()
+    this.cacheFilePath = join(basePath, 'session-stats.json')
+    this.ensureCacheDir()
+    this.load()
+  }
+
+  private ensureCacheDir(): void {
+    const dir = dirname(this.cacheFilePath)
+    if (!existsSync(dir)) {
+      mkdirSync(dir, { recursive: true })
+    }
+  }
+
+  private load(): void {
+    if (!existsSync(this.cacheFilePath)) return
+    try {
+      const raw = readFileSync(this.cacheFilePath, 'utf8')
+      const parsed = JSON.parse(raw) as unknown
+      if (!parsed || typeof parsed !== 'object') {
+        this.store = { version: CACHE_VERSION, scopes: {} }
+        return
+      }
+
+      const payload = parsed as Record<string, unknown>
+      const scopesRaw = payload.scopes
+      if (!scopesRaw || typeof scopesRaw !== 'object') {
+        this.store = { version: CACHE_VERSION, scopes: {} }
+        return
+      }
+
+      const scopes: Record<string, SessionStatsScopeMap> = {}
+      for (const [scopeKey, scopeValue] of Object.entries(scopesRaw as Record<string, unknown>)) {
+        if (!scopeValue || typeof scopeValue !== 'object') continue
+        const normalizedScope: SessionStatsScopeMap = {}
+        for (const [sessionId, entryRaw] of Object.entries(scopeValue as Record<string, unknown>)) {
+          const entry = normalizeEntry(entryRaw)
+          if (!entry) continue
+          normalizedScope[sessionId] = entry
+        }
+        if (Object.keys(normalizedScope).length > 0) {
+          scopes[scopeKey] = normalizedScope
+        }
+      }
+
+      this.store = {
+        version: CACHE_VERSION,
+        scopes
+      }
+    } catch (error) {
+      console.error('SessionStatsCacheService: 载入缓存失败', error)
+      this.store = { version: CACHE_VERSION, scopes: {} }
+    }
+  }
+
+  get(scopeKey: string, sessionId: string): SessionStatsCacheEntry | undefined {
+    if (!scopeKey || !sessionId) return undefined
+    const scope = this.store.scopes[scopeKey]
+    if (!scope) return undefined
+    const entry = normalizeEntry(scope[sessionId])
+    if (!entry) {
+      delete scope[sessionId]
+      if (Object.keys(scope).length === 0) {
+        delete this.store.scopes[scopeKey]
+      }
+      this.persist()
+      return undefined
+    }
+    return entry
+  }
+
+  set(scopeKey: string, sessionId: string, entry: SessionStatsCacheEntry): void {
+    if (!scopeKey || !sessionId) return
+    const normalized = normalizeEntry(entry)
+    if (!normalized) return
+
+    if (!this.store.scopes[scopeKey]) {
+      this.store.scopes[scopeKey] = {}
+    }
+    this.store.scopes[scopeKey][sessionId] = normalized
+
+    this.trimScope(scopeKey)
+    this.trimScopes()
+    this.persist()
+  }
+
+  delete(scopeKey: string, sessionId: string): void {
+    if (!scopeKey || !sessionId) return
+    const scope = this.store.scopes[scopeKey]
+    if (!scope) return
+    if (!(sessionId in scope)) return
+
+    delete scope[sessionId]
+    if (Object.keys(scope).length === 0) {
+      delete this.store.scopes[scopeKey]
+    }
+    this.persist()
+  }
+
+  clearScope(scopeKey: string): void {
+    if (!scopeKey) return
+    if (!this.store.scopes[scopeKey]) return
+    delete this.store.scopes[scopeKey]
+    this.persist()
+  }
+
+  clearAll(): void {
+    this.store = { version: CACHE_VERSION, scopes: {} }
+    try {
+      rmSync(this.cacheFilePath, { force: true })
+    } catch (error) {
+      console.error('SessionStatsCacheService: 清理缓存失败', error)
+    }
+  }
+
+  private trimScope(scopeKey: string): void {
+    const scope = this.store.scopes[scopeKey]
+    if (!scope) return
+    const entries = Object.entries(scope)
+    if (entries.length <= MAX_SESSION_ENTRIES_PER_SCOPE) return
+
+    entries.sort((a, b) => b[1].updatedAt - a[1].updatedAt)
+    const trimmed: SessionStatsScopeMap = {}
+    for (const [sessionId, entry] of entries.slice(0, MAX_SESSION_ENTRIES_PER_SCOPE)) {
+      trimmed[sessionId] = entry
+    }
+    this.store.scopes[scopeKey] = trimmed
+  }
+
+  private trimScopes(): void {
+    const scopeEntries = Object.entries(this.store.scopes)
+    if (scopeEntries.length <= MAX_SCOPE_ENTRIES) return
+
+    scopeEntries.sort((a, b) => {
+      const aUpdatedAt = Math.max(...Object.values(a[1]).map((entry) => entry.updatedAt), 0)
+      const bUpdatedAt = Math.max(...Object.values(b[1]).map((entry) => entry.updatedAt), 0)
+      return bUpdatedAt - aUpdatedAt
+    })
+
+    const trimmedScopes: Record<string, SessionStatsScopeMap> = {}
+    for (const [scopeKey, scopeMap] of scopeEntries.slice(0, MAX_SCOPE_ENTRIES)) {
+      trimmedScopes[scopeKey] = scopeMap
+    }
+    this.store.scopes = trimmedScopes
+  }
+
+  private persist(): void {
+    try {
+      writeFileSync(this.cacheFilePath, JSON.stringify(this.store), 'utf8')
+    } catch (error) {
+      console.error('SessionStatsCacheService: 保存缓存失败', error)
+    }
+  }
+}