diff --git a/electron/exportWorker.ts b/electron/exportWorker.ts
index 509c3dd..c8ab220 100644
--- a/electron/exportWorker.ts
+++ b/electron/exportWorker.ts
@@ -1,14 +1,18 @@
 import { parentPort, workerData } from 'worker_threads'
-import type { ExportOptions } from './services/exportService'
 
 interface ExportWorkerConfig {
-  sessionIds: string[]
-  outputDir: string
-  options: ExportOptions
+  mode?: 'sessions' | 'single' | 'contacts'
+  sessionIds?: string[]
+  sessionId?: string
+  outputDir?: string
+  outputPath?: string
+  options?: any
   taskId?: string
   dbPath?: string
   decryptKey?: string
   myWxid?: string
+  imageXorKey?: unknown
+  imageAesKey?: string
   resourcesPath?: string
   userDataPath?: string
   logEnabled?: boolean
@@ -20,6 +24,93 @@ const controlState = {
   stopRequested: false
 }
 
+const CREATED_PATH_FLUSH_INTERVAL_MS = 200
+const CREATED_PATH_BATCH_LIMIT = 256
+const PROGRESS_POST_INTERVAL_MS = 180
+let queuedCreatedFiles: string[] = []
+let queuedCreatedDirs: string[] = []
+let createdPathFlushTimer: ReturnType<typeof setTimeout> | null = null
+let pendingProgress: any = null
+let progressPostTimer: ReturnType<typeof setTimeout> | null = null
+let lastProgressPostedAt = 0
+
+function flushCreatedPaths() {
+  if (createdPathFlushTimer) {
+    clearTimeout(createdPathFlushTimer)
+    createdPathFlushTimer = null
+  }
+  const filePaths = queuedCreatedFiles
+  const dirPaths = queuedCreatedDirs
+  queuedCreatedFiles = []
+  queuedCreatedDirs = []
+  if (!parentPort) return
+  if (filePaths.length > 0) {
+    parentPort.postMessage({ type: 'export:createdFiles', filePaths })
+  }
+  if (dirPaths.length > 0) {
+    parentPort.postMessage({ type: 'export:createdDirs', dirPaths })
+  }
+}
+
+function scheduleCreatedPathFlush() {
+  if (createdPathFlushTimer) return
+  createdPathFlushTimer = setTimeout(flushCreatedPaths, CREATED_PATH_FLUSH_INTERVAL_MS)
+}
+
+function queueCreatedFile(filePath: string) {
+  const normalized = String(filePath || '').trim()
+  if (!normalized) return
+  queuedCreatedFiles.push(normalized)
+  if (queuedCreatedFiles.length + queuedCreatedDirs.length >= CREATED_PATH_BATCH_LIMIT) {
+    flushCreatedPaths()
+  } else {
+    scheduleCreatedPathFlush()
+  }
+}
+
+function queueCreatedDir(dirPath: string) {
+  const normalized = String(dirPath || '').trim()
+  if (!normalized) return
+  queuedCreatedDirs.push(normalized)
+  if (queuedCreatedFiles.length + queuedCreatedDirs.length >= CREATED_PATH_BATCH_LIMIT) {
+    flushCreatedPaths()
+  } else {
+    scheduleCreatedPathFlush()
+  }
+}
+
+function flushProgress() {
+  if (!pendingProgress) return
+  if (progressPostTimer) {
+    clearTimeout(progressPostTimer)
+    progressPostTimer = null
+  }
+  parentPort?.postMessage({
+    type: 'export:progress',
+    data: pendingProgress
+  })
+  pendingProgress = null
+  lastProgressPostedAt = Date.now()
+}
+
+function queueProgress(progress: any) {
+  pendingProgress = progress
+  if (progress?.phase === 'complete') {
+    flushProgress()
+    return
+  }
+
+  const now = Date.now()
+  const elapsed = now - lastProgressPostedAt
+  if (elapsed >= PROGRESS_POST_INTERVAL_MS) {
+    flushProgress()
+    return
+  }
+
+  if (progressPostTimer) return
+  progressPostTimer = setTimeout(flushProgress, PROGRESS_POST_INTERVAL_MS - elapsed)
+}
+
 parentPort?.on('message', (message: any) => {
   if (!message || typeof message.type !== 'string') return
   if (message.type === 'export:pause') {
@@ -57,32 +148,49 @@ async function run() {
   exportService.setRuntimeConfig({
     dbPath: config.dbPath,
     decryptKey: config.decryptKey,
-    myWxid: config.myWxid
+    myWxid: config.myWxid,
+    imageXorKey: config.imageXorKey,
+    imageAesKey: config.imageAesKey
   })
 
-  const result = await exportService.exportSessions(
-    Array.isArray(config.sessionIds) ? config.sessionIds : [],
-    String(config.outputDir || ''),
-    config.options || { format: 'json' },
-    (progress) => {
-      parentPort?.postMessage({
-        type: 'export:progress',
-        data: progress
-      })
-    },
-    config.taskId
-      ? {
-          shouldPause: () => controlState.pauseRequested,
-          shouldStop: () => controlState.stopRequested,
-          recordCreatedFile: (filePath: string) => {
-            parentPort?.postMessage({ type: 'export:createdFile', filePath })
-          },
-          recordCreatedDir: (dirPath: string) => {
-            parentPort?.postMessage({ type: 'export:createdDir', dirPath })
-          }
-        }
-      : undefined
-  )
+  const onProgress = (progress: any) => queueProgress(progress)
+
+  const taskControl = config.taskId
+    ? {
+        shouldPause: () => controlState.pauseRequested,
+        shouldStop: () => controlState.stopRequested,
+        recordCreatedFile: queueCreatedFile,
+        recordCreatedDir: queueCreatedDir
+      }
+    : undefined
+
+  let result: any
+  if (config.mode === 'contacts') {
+    const { contactExportService } = await import('./services/contactExportService')
+    result = await contactExportService.exportContacts(
+      String(config.outputDir || ''),
+      config.options || {}
+    )
+  } else if (config.mode === 'single') {
+    result = await exportService.exportSessionToChatLab(
+      String(config.sessionId || '').trim(),
+      String(config.outputPath || '').trim(),
+      config.options || { format: 'chatlab' },
+      onProgress,
+      taskControl
+    )
+  } else {
+    result = await exportService.exportSessions(
+      Array.isArray(config.sessionIds) ? config.sessionIds : [],
+      String(config.outputDir || ''),
+      config.options || { format: 'json' },
+      onProgress,
+      taskControl
+    )
+  }
+
+  flushProgress()
+  flushCreatedPaths()
 
   parentPort?.postMessage({
     type: 'export:result',
@@ -91,6 +199,8 @@ async function run() {
 }
 
 run().catch((error) => {
+  flushProgress()
+  flushCreatedPaths()
   parentPort?.postMessage({
     type: 'export:error',
     error: String(error)
diff --git a/electron/main.ts b/electron/main.ts
index 85f0863..b57b76b 100644
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -23,7 +23,6 @@ import { KeyServiceMac } from './services/keyServiceMac'
 import { voiceTranscribeService } from './services/voiceTranscribeService'
 import { videoService } from './services/videoService'
 import { snsService, isVideoUrl } from './services/snsService'
-import { contactExportService } from './services/contactExportService'
 import { windowsHelloService } from './services/windowsHelloService'
 import { exportCardDiagnosticsService } from './services/exportCardDiagnosticsService'
 import { cloudControlService } from './services/cloudControlService'
@@ -3046,7 +3045,7 @@ function registerIpcHandlers() {
 
   ipcMain.handle('export:exportSessions', async (event, sessionIds: string[], outputDir: string, options: ExportOptions, controlOptions?: { taskId?: string }) => {
     const taskId = normalizeExportTaskId(controlOptions?.taskId)
-    const taskControl = taskId ? exportTaskControlService.createControl(taskId, outputDir) : undefined
+    if (taskId) exportTaskControlService.createControl(taskId, outputDir)
     if (taskId) activeExportTasks.add(taskId)
     const PROGRESS_FORWARD_INTERVAL_MS = 180
     let pendingProgress: ExportProgress | null = null
@@ -3091,17 +3090,13 @@ function registerIpcHandlers() {
       queueProgress(progress)
     }
 
-    const runMainFallback = async (reason: string) => {
-      console.warn(`[fallback-export-main] ${reason}`)
-      return exportService.exportSessions(sessionIds, outputDir, options, onProgress, taskControl)
-    }
-
     const cfg = configService || new ConfigService()
     configService = cfg
     const logEnabled = cfg.get('logEnabled')
     const dbPath = String(cfg.get('dbPath') || '').trim()
     const decryptKey = String(cfg.get('decryptKey') || '').trim()
     const myWxid = String(cfg.get('myWxid') || '').trim()
+    const imageKeys = cfg.getImageKeysForCurrentWxid()
     const resourcesPath = app.isPackaged
       ? join(process.resourcesPath, 'resources')
       : join(app.getAppPath(), 'resources')
@@ -3119,6 +3114,8 @@ function registerIpcHandlers() {
             dbPath,
             decryptKey,
             myWxid,
+            imageXorKey: imageKeys.xorKey,
+            imageAesKey: imageKeys.aesKey,
             resourcesPath,
             userDataPath,
             logEnabled
@@ -3155,6 +3152,20 @@ function registerIpcHandlers() {
             onProgress(msg.data as ExportProgress)
             return
           }
+          if (msg && msg.type === 'export:createdFiles' && taskId) {
+            const filePaths = Array.isArray(msg.filePaths) ? msg.filePaths : []
+            for (const filePath of filePaths) {
+              exportTaskControlService.recordCreatedFile(taskId, String(filePath || ''))
+            }
+            return
+          }
+          if (msg && msg.type === 'export:createdDirs' && taskId) {
+            const dirPaths = Array.isArray(msg.dirPaths) ? msg.dirPaths : []
+            for (const dirPath of dirPaths) {
+              exportTaskControlService.recordCreatedDir(taskId, String(dirPath || ''))
+            }
+            return
+          }
           if (msg && msg.type === 'export:createdFile' && taskId) {
             exportTaskControlService.recordCreatedFile(taskId, String(msg.filePath || ''))
             return
@@ -3191,7 +3202,21 @@ function registerIpcHandlers() {
       const result = await runWorker()
       return await finalizeExportTaskControlResult(taskId, result)
     } catch (error) {
-      const result = await runMainFallback(error instanceof Error ? error.message : String(error))
+      const errorMessage = error instanceof Error ? error.message : String(error)
+      console.error(`[export-worker] ${errorMessage}`)
+      const normalizedSessionIds = Array.isArray(sessionIds) ? sessionIds : []
+      const failedSessionErrors: Record<string, string> = {}
+      for (const sessionId of normalizedSessionIds) {
+        failedSessionErrors[sessionId] = errorMessage
+      }
+      const result = {
+        success: false,
+        successCount: 0,
+        failCount: normalizedSessionIds.length,
+        failedSessionIds: normalizedSessionIds,
+        failedSessionErrors,
+        error: `导出 Worker 执行失败: ${errorMessage}`
+      }
       return await finalizeExportTaskControlResult(taskId, result)
     } finally {
       if (taskId) activeExportTasks.delete(taskId)
@@ -3203,12 +3228,136 @@ function registerIpcHandlers() {
     }
   })
 
-  ipcMain.handle('export:exportSession', async (_, sessionId: string, outputPath: string, options: ExportOptions) => {
-    return exportService.exportSessionToChatLab(sessionId, outputPath, options)
+  ipcMain.handle('export:exportSession', async (event, sessionId: string, outputPath: string, options: ExportOptions) => {
+    const cfg = configService || new ConfigService()
+    configService = cfg
+    const imageKeys = cfg.getImageKeysForCurrentWxid()
+    const workerPath = join(__dirname, 'exportWorker.js')
+
+    try {
+      return await new Promise<any>((resolve) => {
+        const worker = new Worker(workerPath, {
+          workerData: {
+            mode: 'single',
+            sessionId,
+            outputPath,
+            options,
+            dbPath: String(cfg.get('dbPath') || '').trim(),
+            decryptKey: String(cfg.get('decryptKey') || '').trim(),
+            myWxid: String(cfg.get('myWxid') || '').trim(),
+            imageXorKey: imageKeys.xorKey,
+            imageAesKey: imageKeys.aesKey,
+            resourcesPath: app.isPackaged ? join(process.resourcesPath, 'resources') : join(app.getAppPath(), 'resources'),
+            userDataPath: app.getPath('userData'),
+            logEnabled: cfg.get('logEnabled')
+          }
+        })
+
+        let settled = false
+        const finalize = (value: any) => {
+          if (settled) return
+          settled = true
+          worker.removeAllListeners()
+          void worker.terminate()
+          resolve(value)
+        }
+        const fail = (error: unknown) => {
+          const errorMessage = error instanceof Error ? error.message : String(error)
+          console.error(`[export-worker-single] ${errorMessage}`)
+          finalize({ success: false, error: `导出 Worker 执行失败: ${errorMessage}` })
+        }
+
+        worker.on('message', (msg: any) => {
+          if (msg && msg.type === 'export:progress') {
+            if (!event.sender.isDestroyed()) {
+              event.sender.send('export:progress', msg.data)
+            }
+            return
+          }
+          if (msg && msg.type === 'export:result') {
+            finalize(msg.data)
+            return
+          }
+          if (msg && msg.type === 'export:error') {
+            fail(String(msg.error || '导出 Worker 执行失败'))
+          }
+        })
+        worker.on('error', fail)
+        worker.on('exit', (code) => {
+          if (settled) return
+          if (code === 0) {
+            finalize({ success: false, error: '导出 Worker 未返回结果' })
+          } else {
+            fail(`导出 Worker 异常退出: ${code}`)
+          }
+        })
+      })
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error)
+      console.error(`[export-worker-single] ${errorMessage}`)
+      return { success: false, error: `导出 Worker 启动失败: ${errorMessage}` }
+    }
   })
 
   ipcMain.handle('export:exportContacts', async (_, outputDir: string, options: any) => {
-    return contactExportService.exportContacts(outputDir, options)
+    const cfg = configService || new ConfigService()
+    configService = cfg
+    const workerPath = join(__dirname, 'exportWorker.js')
+
+    try {
+      return await new Promise<any>((resolve) => {
+        const worker = new Worker(workerPath, {
+          workerData: {
+            mode: 'contacts',
+            outputDir,
+            options,
+            dbPath: String(cfg.get('dbPath') || '').trim(),
+            decryptKey: String(cfg.get('decryptKey') || '').trim(),
+            myWxid: String(cfg.get('myWxid') || '').trim(),
+            resourcesPath: app.isPackaged ? join(process.resourcesPath, 'resources') : join(app.getAppPath(), 'resources'),
+            userDataPath: app.getPath('userData'),
+            logEnabled: cfg.get('logEnabled')
+          }
+        })
+
+        let settled = false
+        const finalize = (value: any) => {
+          if (settled) return
+          settled = true
+          worker.removeAllListeners()
+          void worker.terminate()
+          resolve(value)
+        }
+        const fail = (error: unknown) => {
+          const errorMessage = error instanceof Error ? error.message : String(error)
+          console.error(`[export-worker-contacts] ${errorMessage}`)
+          finalize({ success: false, error: `导出 Worker 执行失败: ${errorMessage}` })
+        }
+
+        worker.on('message', (msg: any) => {
+          if (msg && msg.type === 'export:result') {
+            finalize(msg.data)
+            return
+          }
+          if (msg && msg.type === 'export:error') {
+            fail(String(msg.error || '导出 Worker 执行失败'))
+          }
+        })
+        worker.on('error', fail)
+        worker.on('exit', (code) => {
+          if (settled) return
+          if (code === 0) {
+            finalize({ success: false, error: '导出 Worker 未返回结果' })
+          } else {
+            fail(`导出 Worker 异常退出: ${code}`)
+          }
+        })
+      })
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error)
+      console.error(`[export-worker-contacts] ${errorMessage}`)
+      return { success: false, error: `导出 Worker 启动失败: ${errorMessage}` }
+    }
   })
 
   // 数据分析相关
diff --git a/electron/services/exportService.ts b/electron/services/exportService.ts
index a3c730b..732a984 100644
--- a/electron/services/exportService.ts
+++ b/electron/services/exportService.ts
@@ -112,6 +112,7 @@ export interface ExportOptions {
   excelCompactColumns?: boolean
   txtColumns?: string[]
   sessionLayout?: 'shared' | 'per-session'
+  exportWriteLayout?: 'A' | 'B' | 'C'
   sessionNameWithTypePrefix?: boolean
   displayNamePreference?: 'group-nickname' | 'remark' | 'nickname'
   exportConcurrency?: number
@@ -271,7 +272,7 @@ async function parallelLimit<T, R>(
 
 class ExportService {
   private configService: ConfigService
-  private runtimeConfig: { dbPath?: string; decryptKey?: string; myWxid?: string } | null = null
+  private runtimeConfig: { dbPath?: string; decryptKey?: string; myWxid?: string; imageXorKey?: unknown; imageAesKey?: string } | null = null
   private contactCache: LRUCache<string, { displayName: string; avatarUrl?: string }>
   private inlineEmojiCache: LRUCache<string, string>
   private htmlStyleCache: string | null = null
@@ -287,6 +288,8 @@ class ExportService {
   private mediaExportTelemetry: MediaExportTelemetry | null = null
   private mediaRunSourceDedupMap = new Map<string, string>()
   private mediaRunMissingImageKeys = new Set<string>()
+  private activeChatImagePipelineCount = 0
+  private chatImagePipelineWaiters: Array<() => void> = []
   private mediaFileCacheCleanupPending: Promise<void> | null = null
   private mediaFileCacheLastCleanupAt = 0
   private readonly mediaFileCacheCleanupIntervalMs = 30 * 60 * 1000
@@ -320,8 +323,22 @@ class ExportService {
     return error
   }
 
-  setRuntimeConfig(config: { dbPath?: string; decryptKey?: string; myWxid?: string } | null): void {
+  setRuntimeConfig(config: { dbPath?: string; decryptKey?: string; myWxid?: string; imageXorKey?: unknown; imageAesKey?: string } | null): void {
     this.runtimeConfig = config
+    imageDecryptService.setRuntimeConfig({
+      dbPath: config?.dbPath,
+      myWxid: config?.myWxid,
+      imageXorKey: config?.imageXorKey,
+      imageAesKey: config?.imageAesKey
+    })
+  }
+
+  private getConfiguredDbPath(): string {
+    return String(this.runtimeConfig?.dbPath || this.configService.get('dbPath') || '').trim()
+  }
+
+  private getConfiguredMyWxid(): string {
+    return String(this.runtimeConfig?.myWxid || this.configService.get('myWxid') || '').trim()
   }
 
   private normalizeSessionIds(sessionIds: string[]): string[] {
@@ -354,6 +371,33 @@ class ExportService {
     return { start, end }
   }
 
+  private normalizeMaxFileSizeMb(value: unknown): number | undefined {
+    const raw = Number(value)
+    if (!Number.isFinite(raw) || raw <= 0) return undefined
+    return Math.floor(raw)
+  }
+
+  private normalizeExportOptionsForRun(options: ExportOptions): ExportOptions {
+    const normalizedDateRange = this.normalizeExportDateRange(options.dateRange)
+    const normalizedMaxFileSizeMb = this.normalizeMaxFileSizeMb(options.maxFileSizeMb)
+    const normalizedWriteLayout = this.resolveExportWriteLayout(options)
+    return {
+      ...options,
+      dateRange: normalizedDateRange,
+      maxFileSizeMb: normalizedMaxFileSizeMb,
+      exportWriteLayout: normalizedWriteLayout
+    }
+  }
+
+  private resolveExportWriteLayout(options?: Pick<ExportOptions, 'exportWriteLayout'> | null): 'A' | 'B' | 'C' {
+    const optionLayout = options?.exportWriteLayout
+    if (optionLayout === 'A' || optionLayout === 'B' || optionLayout === 'C') return optionLayout
+    const rawWriteLayout = this.configService.get('exportWriteLayout')
+    return rawWriteLayout === 'A' || rawWriteLayout === 'B' || rawWriteLayout === 'C'
+      ? rawWriteLayout
+      : 'B'
+  }
+
   private getExportStatsDateRangeToken(dateRange?: { start: number; end: number } | null): string {
     const normalized = this.normalizeExportDateRange(dateRange)
     if (!normalized) return 'all'
@@ -370,8 +414,8 @@ class ExportService {
     const normalizedIds = this.normalizeSessionIds(sessionIds).sort()
     const senderToken = String(options.senderUsername || '').trim()
     const dateToken = this.getExportStatsDateRangeToken(options.dateRange)
-    const dbPath = String(this.configService.get('dbPath') || '').trim()
-    const wxidToken = String(cleanedWxid || this.cleanAccountDirName(String(this.configService.get('myWxid') || '')) || '').trim()
+    const dbPath = this.getConfiguredDbPath()
+    const wxidToken = String(cleanedWxid || this.cleanAccountDirName(this.getConfiguredMyWxid()) || '').trim()
     return `${dbPath}::${wxidToken}::${dateToken}::${senderToken}::${normalizedIds.join('\u001f')}`
   }
 
@@ -712,6 +756,20 @@ class ExportService {
     this.mediaRunMissingImageKeys.clear()
   }
 
+  private async runWithChatImagePipelineLimit<T>(fn: () => Promise<T>): Promise<T> {
+    while (this.activeChatImagePipelineCount >= 2) {
+      await new Promise<void>((resolve) => this.chatImagePipelineWaiters.push(resolve))
+    }
+    this.activeChatImagePipelineCount += 1
+    try {
+      return await fn()
+    } finally {
+      this.activeChatImagePipelineCount = Math.max(0, this.activeChatImagePipelineCount - 1)
+      const next = this.chatImagePipelineWaiters.shift()
+      if (next) next()
+    }
+  }
+
   private getMediaTelemetrySnapshot(): Partial<ExportProgress> {
     const stats = this.mediaExportTelemetry
     if (!stats) return {}
@@ -1577,8 +1635,8 @@ class ExportService {
   }
 
   private resolveStrictEmoticonDbPath(): string | null {
-    const dbPath = String(this.configService.get('dbPath') || '').trim()
-    const rawWxid = String(this.configService.get('myWxid') || '').trim()
+    const dbPath = this.getConfiguredDbPath()
+    const rawWxid = this.getConfiguredMyWxid()
     const cleanedWxid = this.cleanAccountDirName(rawWxid)
     const token = `${dbPath}::${rawWxid}::${cleanedWxid}`
     if (token === this.emoticonDbPathCacheToken) {
@@ -1823,8 +1881,8 @@ class ExportService {
   }
 
   private async ensureConnected(): Promise<{ success: boolean; cleanedWxid?: string; error?: string }> {
-    const wxid = String(this.runtimeConfig?.myWxid || this.configService.get('myWxid') || '').trim()
-    const dbPath = String(this.runtimeConfig?.dbPath || this.configService.get('dbPath') || '').trim()
+    const wxid = this.getConfiguredMyWxid()
+    const dbPath = this.getConfiguredDbPath()
     const decryptKey = String(this.runtimeConfig?.decryptKey || this.configService.get('decryptKey') || '').trim()
     if (!wxid) return { success: false, error: '请先在设置页面配置微信ID' }
     if (!dbPath) return { success: false, error: '请先在设置页面配置数据库路径' }
@@ -4092,44 +4150,79 @@ class ExportService {
 
       const tryResolveImagePath = async (imageMd5?: string, imageDatName?: string): Promise<string | null> => {
         if (!imageMd5 && !imageDatName) return null
+        return this.runWithChatImagePipelineLimit(async () => {
+          const pickResolvedImagePath = (result: any): string | null => {
+            if (!result?.success) return null
+            const resolved = String(result.localPath || '').trim()
+            return resolved || null
+          }
 
-        const decryptResult = await imageDecryptService.decryptImage({
-          sessionId,
-          imageMd5,
-          imageDatName,
-          createTime: msg.createTime,
-          force: true,  // 导出优先高清，失败再回退缩略图
-          preferFilePath: true,
-          hardlinkOnly: true,
-          disableUpdateCheck: true,
-          allowCacheIndex: !imageMd5,
-          suppressEvents: true
+          const resolveCachedPath = async (candidateMd5?: string, candidateDatName?: string): Promise<string | null> => {
+            const cachedResult = await imageDecryptService.resolveCachedImage({
+              sessionId,
+              imageMd5: candidateMd5,
+              imageDatName: candidateDatName,
+              createTime: msg.createTime,
+              preferFilePath: true,
+              hardlinkOnly: true,
+              disableUpdateCheck: true,
+              allowCacheIndex: true,
+              suppressEvents: true
+            })
+            return pickResolvedImagePath(cachedResult)
+          }
+
+          const cachedPath = await resolveCachedPath(imageMd5, imageDatName)
+          if (cachedPath) {
+            return cachedPath
+          }
+
+          const decryptResult = await imageDecryptService.decryptImage({
+            sessionId,
+            imageMd5,
+            imageDatName,
+            createTime: msg.createTime,
+            force: false,
+            preferFilePath: true,
+            hardlinkOnly: true,
+            allowCacheIndex: true
+          })
+          const decryptedPath = pickResolvedImagePath(decryptResult)
+          if (decryptedPath) return decryptedPath
+
+          const localId = Number(msg?.localId || 0)
+          if (Number.isFinite(localId) && localId > 0) {
+            const fallback = await chatService.getImageData(sessionId, String(localId))
+            if (fallback.success && fallback.data) {
+              const buffer = Buffer.from(fallback.data, 'base64')
+              const mime = this.detectMimeType(buffer) || 'image/jpeg'
+              return `data:${mime};base64,${fallback.data}`
+            }
+          }
+
+          if (decryptResult.failureKind === 'decrypt_failed') {
+            console.log(`[Export] 图片解密失败 (localId=${msg.localId}): imageMd5=${imageMd5 || ''}, imageDatName=${imageDatName || ''}, error=${decryptResult.error || '未知'}`)
+          } else {
+            console.log(`[Export] 图片本地无数据 (localId=${msg.localId}): imageMd5=${imageMd5 || ''}, imageDatName=${imageDatName || ''}, error=${decryptResult.error || '未知'}`)
+          }
+
+          const thumbResult = await imageDecryptService.resolveCachedImage({
+            sessionId,
+            imageMd5,
+            imageDatName,
+            createTime: msg.createTime,
+            preferFilePath: true,
+            hardlinkOnly: true,
+            disableUpdateCheck: true,
+            allowCacheIndex: true,
+            suppressEvents: true
+          })
+          if (thumbResult.success && thumbResult.localPath) {
+            console.log(`[Export] 使用缩略图替代 (localId=${msg.localId}): ${thumbResult.localPath}`)
+            return thumbResult.localPath
+          }
+          return null
         })
-        if (decryptResult.success && decryptResult.localPath) {
-          return decryptResult.localPath
-        }
-
-        if (decryptResult.failureKind === 'decrypt_failed') {
-          console.log(`[Export] 图片解密失败 (localId=${msg.localId}): imageMd5=${imageMd5 || ''}, imageDatName=${imageDatName || ''}, error=${decryptResult.error || '未知'}`)
-        } else {
-          console.log(`[Export] 图片本地无数据 (localId=${msg.localId}): imageMd5=${imageMd5 || ''}, imageDatName=${imageDatName || ''}, error=${decryptResult.error || '未知'}`)
-        }
-
-        const thumbResult = await imageDecryptService.resolveCachedImage({
-          sessionId,
-          imageMd5,
-          imageDatName,
-          createTime: msg.createTime,
-          preferFilePath: true,
-          disableUpdateCheck: true,
-          allowCacheIndex: !imageMd5,
-          suppressEvents: true
-        })
-        if (thumbResult.success && thumbResult.localPath) {
-          console.log(`[Export] 使用缩略图替代 (localId=${msg.localId}): ${thumbResult.localPath}`)
-          return thumbResult.localPath
-        }
-        return null
       }
 
       // 使用消息对象中已提取的字段，先尝试快速导出。
@@ -4235,11 +4328,10 @@ class ExportService {
         const imageMd5 = String(msg?.imageMd5 || '').trim().toLowerCase()
         if (imageMd5) {
           imageMd5Set.add(imageMd5)
-        } else {
-          const imageDatName = String(msg?.imageDatName || '').trim().toLowerCase()
-          if (md5Pattern.test(imageDatName)) {
-            imageMd5Set.add(imageDatName)
-          }
+        }
+        const imageDatName = String(msg?.imageDatName || '').trim().toLowerCase()
+        if (md5Pattern.test(imageDatName)) {
+          imageMd5Set.add(imageDatName)
         }
       }
 
@@ -4487,16 +4579,89 @@ class ExportService {
    */
   private extractImageDatName(content: string): string | undefined {
     if (!content) return undefined
-    // 尝试从 cdnthumburl 或其他字段提取
-    const urlMatch = /cdnthumburl[^>]*>([^<]+)/i.exec(content)
-    if (urlMatch) {
-      const urlParts = urlMatch[1].split('/')
-      const last = urlParts[urlParts.length - 1]
-      if (last && last.includes('_')) {
-        return last.split('_')[0]
-      }
+    const candidate =
+      this.extractXmlValue(content, 'imgname') ||
+      this.extractXmlValue(content, 'cdnmidimgurl') ||
+      this.extractXmlValue(content, 'cdnthumburl') ||
+      this.extractXmlAttribute(content, 'img', 'imgname') ||
+      this.extractXmlAttribute(content, 'img', 'cdnmidimgurl') ||
+      this.extractXmlAttribute(content, 'img', 'cdnthumburl')
+    return this.normalizeImageDatNameToken(candidate)
+  }
+
+  private normalizeImageDatNameToken(value: unknown): string | undefined {
+    let text = String(value ?? '').trim()
+    if (!text) return undefined
+    text = text.replace(/&amp;/g, '&')
+    try {
+      if (text.includes('%')) text = decodeURIComponent(text)
+    } catch { }
+
+    const datLike = /([0-9a-fA-F]{8,})(?:\.t)?\.dat/i.exec(text)
+    if (datLike?.[1]) return datLike[1].toLowerCase()
+
+    const base = text
+      .split(/[?#]/, 1)[0]
+      .replace(/^.*[\\/]/, '')
+      .replace(/\.(?:t\.)?dat$/i, '')
+      .trim()
+    if (!base) return undefined
+
+    const cdnToken = base.includes('_') ? base.split('_')[0] : base
+    const exact = /^([a-fA-F0-9]{16,64})$/.exec(cdnToken)
+    if (exact?.[1]) return exact[1].toLowerCase()
+
+    const preferred32 = /([a-fA-F0-9]{32})(?![a-fA-F0-9])/i.exec(cdnToken)
+    if (preferred32?.[1]) return preferred32[1].toLowerCase()
+    const fallback = /([a-fA-F0-9]{16,64})(?![a-fA-F0-9])/i.exec(cdnToken)
+    return fallback?.[1]?.toLowerCase()
+  }
+
+  private extractImageDatNameFromPackedRaw(raw: unknown): string | undefined {
+    const buffer = this.decodePackedInfoBuffer(raw)
+    if (!buffer || buffer.length === 0) return undefined
+    const printable: number[] = []
+    for (const byte of buffer) {
+      printable.push(byte >= 0x20 && byte <= 0x7e ? byte : 0x20)
     }
-    return undefined
+    const text = Buffer.from(printable).toString('utf-8')
+    const datLike = /([0-9a-fA-F]{8,})(?:\.t)?\.dat/i.exec(text)
+    if (datLike?.[1]) return datLike[1].toLowerCase()
+    const fallback = /([0-9a-fA-F]{16,})/.exec(text)
+    return fallback?.[1]?.toLowerCase()
+  }
+
+  private extractImageDatNameFromRow(row: Record<string, any>, content?: string): string | undefined {
+    const byColumn = this.normalizeImageDatNameToken(this.getRowField(row, [
+      'image_path',
+      'imagePath',
+      'image_dat_name',
+      'imageDatName',
+      'img_path',
+      'imgPath',
+      'img_name',
+      'imgName'
+    ]))
+    if (byColumn) return byColumn
+
+    const packedRaw = this.getRowField(row, [
+      'packed_info_data',
+      'packedInfoData',
+      'packed_info_blob',
+      'packedInfoBlob',
+      'packed_info',
+      'packedInfo',
+      'BytesExtra',
+      'bytes_extra',
+      'WCDB_CT_packed_info',
+      'reserved0',
+      'Reserved0',
+      'WCDB_CT_Reserved0'
+    ])
+    const byPacked = this.extractImageDatNameFromPackedRaw(packedRaw)
+    if (byPacked) return byPacked
+
+    return this.extractImageDatName(content || '')
   }
 
   /**
@@ -4699,8 +4864,8 @@ class ExportService {
   }
 
   private resolveFileAttachmentSearchRoots(): FileAttachmentSearchRoot[] {
-    const dbPath = String(this.configService.get('dbPath') || '').trim()
-    const rawWxid = String(this.configService.get('myWxid') || '').trim()
+    const dbPath = this.getConfiguredDbPath()
+    const rawWxid = this.getConfiguredMyWxid()
     const cleanedWxid = this.cleanAccountDirName(rawWxid)
     if (!dbPath) return []
 
@@ -5050,10 +5215,7 @@ class ExportService {
     const exportMediaEnabled = options.exportMedia === true &&
       Boolean(options.exportImages || options.exportVoices || options.exportVideos || options.exportEmojis || options.exportFiles)
     const outputDir = path.dirname(outputPath)
-    const rawWriteLayout = this.configService.get('exportWriteLayout')
-    const writeLayout = rawWriteLayout === 'A' || rawWriteLayout === 'B' || rawWriteLayout === 'C'
-      ? rawWriteLayout
-      : 'A'
+    const writeLayout = this.resolveExportWriteLayout(options)
     // A: type-first layout, text exports are placed under `texts/`, media is placed at sibling type directories.
     if (writeLayout === 'A' && path.basename(outputDir) === 'texts') {
       return {
@@ -5229,7 +5391,7 @@ class ExportService {
         : await wcdbService.openMessageCursor(
           sessionId,
           batchSize,
-          true,
+          false,
           beginTime,
           endTime
         )
@@ -5417,7 +5579,7 @@ class ExportService {
           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
+            imageDatName = localType === 3 ? this.extractImageDatNameFromRow(row, content) : undefined
             videoMd5 = this.extractVideoFileNameFromRow(row, content)
             xmlType = rowFileHints.xmlType
             fileName = rowFileHints.fileName
@@ -5439,7 +5601,7 @@ class ExportService {
             if (localType === 3 && content) {
               // 图片消息
               imageMd5 = imageMd5 || this.extractImageMd5(content)
-              imageDatName = imageDatName || this.extractImageDatName(content)
+              imageDatName = imageDatName || this.extractImageDatNameFromRow(row, content)
             } else if (localType === 43 && content) {
               // 视频消息
               videoMd5 = videoMd5 || this.extractVideoFileNameFromRow(row, content)
@@ -5587,9 +5749,51 @@ class ExportService {
       }
     }
 
+    if (rows.length > 1) {
+      rows.sort((a, b) => {
+        const timeDelta = (a.createTime || 0) - (b.createTime || 0)
+        if (timeDelta !== 0) return timeDelta
+        return (a.localId || 0) - (b.localId || 0)
+      })
+    }
+
     return { rows, memberSet, firstTime, lastTime }
   }
 
+  private async getRecentWcdbCursorLogSummary(sessionId: string): Promise<string | undefined> {
+    try {
+      const logResult = await wcdbService.getLogs()
+      if (!logResult.success || !Array.isArray(logResult.logs)) return undefined
+      const sid = String(sessionId || '').trim()
+      const interesting = logResult.logs
+        .filter((line) => {
+          const text = String(line || '')
+          if (sid && text.includes(sid)) return true
+          return text.includes('QueryMessageBatch') ||
+            text.includes('InitExportCursorHeap') ||
+            text.includes('cursor_init') ||
+            text.includes('fetch_message_batch') ||
+            text.includes('open_message_cursor')
+        })
+        .slice(-8)
+      if (interesting.length === 0) return undefined
+      return interesting.join(' | ')
+    } catch {
+      return undefined
+    }
+  }
+
+  private async buildNoMessagesError(
+    sessionId: string,
+    collected: { error?: string },
+    fallback = '该会话在指定时间范围内没有消息'
+  ): Promise<string> {
+    if (collected.error) return collected.error
+    const nativeLogSummary = await this.getRecentWcdbCursorLogSummary(sessionId)
+    if (!nativeLogSummary) return fallback
+    return `${fallback}；WCDB日志：${nativeLogSummary}`
+  }
+
   private async backfillMediaFieldsFromMessageDetail(
     sessionId: string,
     rows: any[],
@@ -5608,7 +5812,7 @@ class ExportService {
         return !msg.xmlType || !msg.fileName || !msg.fileMd5 || !msg.fileSize || !msg.fileExt
       }
       if (!targetMediaTypes.has(msg.localType)) return false
-      if (msg.localType === 3) return !msg.imageMd5 && !msg.imageDatName
+      if (msg.localType === 3) return !msg.imageMd5 || !msg.imageDatName
       if (msg.localType === 47) return !msg.emojiMd5
       if (msg.localType === 43) return !msg.videoMd5
       return false
@@ -5639,7 +5843,7 @@ class ExportService {
 
         if (msg.localType === 3) {
           const imageMd5 = (String(row.image_md5 || row.imageMd5 || '').trim() || this.extractImageMd5(content) || '').toLowerCase()
-          const imageDatName = (String(row.image_dat_name || row.imageDatName || '').trim() || this.extractImageDatName(content) || '').toLowerCase()
+          const imageDatName = this.extractImageDatNameFromRow(row, content) || ''
           if (imageMd5) msg.imageMd5 = imageMd5
           if (imageDatName) msg.imageDatName = imageDatName
           return
@@ -6111,7 +6315,7 @@ class ExportService {
 
       const cleanedMyWxid = conn.cleanedWxid
       const isGroup = sessionId.includes('@chatroom')
-      const rawMyWxid = String(this.configService.get('myWxid') || '').trim()
+      const rawMyWxid = this.getConfiguredMyWxid()
 
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
@@ -6149,7 +6353,7 @@ class ExportService {
 
       // 如果没有消息,不创建文件
       if (totalMessages === 0) {
-        return { success: false, error: collected.error || '该会话在指定时间范围内没有消息' }
+        return { success: false, error: await this.buildNoMessagesError(sessionId, collected) }
       }
 
       await this.hydrateEmojiCaptionsForMessages(sessionId, allMessages, control)
@@ -6649,7 +6853,7 @@ class ExportService {
 
       const cleanedMyWxid = conn.cleanedWxid
       const isGroup = sessionId.includes('@chatroom')
-      const rawMyWxid = String(this.configService.get('myWxid') || '').trim()
+      const rawMyWxid = this.getConfiguredMyWxid()
 
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
@@ -6687,7 +6891,7 @@ class ExportService {
 
       // 如果没有消息,不创建文件
       if (totalMessages === 0) {
-        return { success: false, error: collected.error || '该会话在指定时间范围内没有消息' }
+        return { success: false, error: await this.buildNoMessagesError(sessionId, collected) }
       }
 
       await this.hydrateEmojiCaptionsForMessages(sessionId, collected.rows, control)
@@ -7380,7 +7584,7 @@ class ExportService {
 
       const cleanedMyWxid = conn.cleanedWxid
       const isGroup = sessionId.includes('@chatroom')
-      const rawMyWxid = String(this.configService.get('myWxid') || '').trim()
+      const rawMyWxid = this.getConfiguredMyWxid()
 
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
@@ -7423,7 +7627,7 @@ class ExportService {
 
       // 如果没有消息,不创建文件
       if (totalMessages === 0) {
-        return { success: false, error: collected.error || '该会话在指定时间范围内没有消息' }
+        return { success: false, error: await this.buildNoMessagesError(sessionId, collected) }
       }
 
       await this.hydrateEmojiCaptionsForMessages(sessionId, collected.rows, control)
@@ -8264,7 +8468,7 @@ class ExportService {
 
       const cleanedMyWxid = conn.cleanedWxid
       const isGroup = sessionId.includes('@chatroom')
-      const rawMyWxid = String(this.configService.get('myWxid') || '').trim()
+      const rawMyWxid = this.getConfiguredMyWxid()
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
 
@@ -8301,7 +8505,7 @@ class ExportService {
 
       // 如果没有消息,不创建文件
       if (totalMessages === 0) {
-        return { success: false, error: collected.error || '该会话在指定时间范围内没有消息' }
+        return { success: false, error: await this.buildNoMessagesError(sessionId, collected) }
       }
 
       await this.hydrateEmojiCaptionsForMessages(sessionId, collected.rows, control)
@@ -8662,7 +8866,7 @@ class ExportService {
 
       const cleanedMyWxid = conn.cleanedWxid
       const isGroup = sessionId.includes('@chatroom')
-      const rawMyWxid = String(this.configService.get('myWxid') || '').trim()
+      const rawMyWxid = this.getConfiguredMyWxid()
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
 
@@ -8697,7 +8901,7 @@ class ExportService {
       )
       let totalMessages = collected.rows.length
       if (totalMessages === 0) {
-        return { success: false, error: collected.error || '该会话在指定时间范围内没有消息' }
+        return { success: false, error: await this.buildNoMessagesError(sessionId, collected) }
       }
 
       await this.hydrateEmojiCaptionsForMessages(sessionId, collected.rows, control)
@@ -9113,7 +9317,7 @@ class ExportService {
 
       const cleanedMyWxid = conn.cleanedWxid
       const isGroup = sessionId.includes('@chatroom')
-      const rawMyWxid = String(this.configService.get('myWxid') || '').trim()
+      const rawMyWxid = this.getConfiguredMyWxid()
       const sessionInfo = await this.getContactInfo(sessionId)
       const myInfo = await this.getContactInfo(cleanedMyWxid)
       const contactCache = new Map<string, { success: boolean; contact?: any; error?: string }>()
@@ -9152,7 +9356,7 @@ class ExportService {
 
       // 如果没有消息,不创建文件
       if (collected.rows.length === 0) {
-        return { success: false, error: collected.error || '该会话在指定时间范围内没有消息' }
+        return { success: false, error: await this.buildNoMessagesError(sessionId, collected) }
       }
       const totalMessages = collected.rows.length
 
@@ -9948,6 +10152,7 @@ class ExportService {
     pendingSessionIds?: string[]
     successSessionIds?: string[]
     failedSessionIds?: string[]
+    failedSessionErrors?: Record<string, string>
     sessionOutputPaths?: Record<string, string>
     error?: string
   }> {
@@ -9955,6 +10160,7 @@ class ExportService {
     let failCount = 0
     const successSessionIds: string[] = []
     const failedSessionIds: string[] = []
+    const failedSessionErrors: Record<string, string> = {}
     const sessionOutputPaths: Record<string, string> = {}
     const progressEmitter = this.createProgressEmitter(onProgress)
     let attachMediaTelemetry = false
@@ -9972,9 +10178,10 @@ class ExportService {
       }
 
       this.resetMediaRuntimeState()
-      const effectiveOptions: ExportOptions = this.isMediaContentBatchExport(options)
-        ? { ...options, exportVoiceAsText: false }
-        : options
+      const normalizedOptions = this.normalizeExportOptionsForRun(options)
+      const effectiveOptions: ExportOptions = this.isMediaContentBatchExport(normalizedOptions)
+        ? { ...normalizedOptions, exportVoiceAsText: false }
+        : normalizedOptions
 
       const exportMediaEnabled = effectiveOptions.exportMedia === true &&
         Boolean(effectiveOptions.exportImages || effectiveOptions.exportVoices || effectiveOptions.exportVideos || effectiveOptions.exportEmojis || effectiveOptions.exportFiles)
@@ -9982,10 +10189,7 @@ class ExportService {
       if (exportMediaEnabled) {
         this.triggerMediaFileCacheCleanup()
       }
-      const rawWriteLayout = this.configService.get('exportWriteLayout')
-      const writeLayout = rawWriteLayout === 'A' || rawWriteLayout === 'B' || rawWriteLayout === 'C'
-        ? rawWriteLayout
-        : 'A'
+      const writeLayout = this.resolveExportWriteLayout(effectiveOptions)
       const exportBaseDir = writeLayout === 'A'
         ? path.join(outputDir, 'texts')
         : outputDir
@@ -10020,7 +10224,6 @@ class ExportService {
       const queue = [...sessionIds]
       let pauseRequested = false
       let stopRequested = false
-      const emptySessionIds = new Set<string>()
       const sessionMessageCountHints = new Map<string, number>()
       const sessionLatestTimestampHints = new Map<string, number>()
       const exportStatsCacheKey = this.buildExportStatsCacheKey(sessionIds, effectiveOptions, conn.cleanedWxid)
@@ -10033,17 +10236,12 @@ class ExportService {
           if (Number.isFinite(snapshot.lastTimestamp) && Number(snapshot.lastTimestamp) > 0) {
             sessionLatestTimestampHints.set(sessionId, Math.floor(Number(snapshot.lastTimestamp)))
           }
-          if (snapshot.totalCount <= 0) {
-            emptySessionIds.add(sessionId)
-          }
         }
       }
       const canUseSessionSnapshotHints = isTextContentBatchExport &&
         this.isUnboundedDateRange(effectiveOptions.dateRange) &&
         !String(effectiveOptions.senderUsername || '').trim()
-      const canFastSkipEmptySessions = !isTextContentBatchExport &&
-        this.isUnboundedDateRange(effectiveOptions.dateRange) &&
-        !String(effectiveOptions.senderUsername || '').trim()
+      const canFastSkipEmptySessions = false
       const canTrySkipUnchangedTextSessions = canUseSessionSnapshotHints
       const precheckSessionIds = canFastSkipEmptySessions
         ? sessionIds.filter((sessionId) => !sessionMessageCountHints.has(sessionId))
@@ -10082,9 +10280,6 @@ class ExportService {
                 if (typeof count === 'number' && Number.isFinite(count) && count >= 0) {
                   sessionMessageCountHints.set(batchSessionId, Math.max(0, Math.floor(count)))
                 }
-                if (typeof count === 'number' && Number.isFinite(count) && count <= 0) {
-                  emptySessionIds.add(batchSessionId)
-                }
               }
             }
 
@@ -10154,6 +10349,7 @@ class ExportService {
           pendingSessionIds: [...queue],
           successSessionIds,
           failedSessionIds,
+          failedSessionErrors,
           sessionOutputPaths
         }
       }
@@ -10166,6 +10362,7 @@ class ExportService {
           pendingSessionIds: [...queue],
           successSessionIds,
           failedSessionIds,
+          failedSessionErrors,
           sessionOutputPaths
         }
       }
@@ -10177,46 +10374,6 @@ class ExportService {
           const messageCountHint = sessionMessageCountHints.get(sessionId)
           const latestTimestampHint = sessionLatestTimestampHints.get(sessionId)
 
-          if (
-            isTextContentBatchExport &&
-            typeof messageCountHint === 'number' &&
-            messageCountHint <= 0
-          ) {
-            successCount++
-            successSessionIds.push(sessionId)
-            activeSessionRatios.delete(sessionId)
-            completedCount++
-            emitProgress({
-              current: computeAggregateCurrent(),
-              total: sessionIds.length,
-              currentSession: sessionInfo.displayName,
-              currentSessionId: sessionId,
-              phase: 'complete',
-              phaseLabel: '该会话没有消息，已跳过',
-              estimatedTotalMessages: 0,
-              exportedMessages: 0
-            }, { force: true })
-            return 'done'
-          }
-
-          if (emptySessionIds.has(sessionId)) {
-            successCount++
-            successSessionIds.push(sessionId)
-            activeSessionRatios.delete(sessionId)
-            completedCount++
-            emitProgress({
-              current: computeAggregateCurrent(),
-              total: sessionIds.length,
-              currentSession: sessionInfo.displayName,
-              currentSessionId: sessionId,
-              phase: 'complete',
-              phaseLabel: '该会话没有消息，已跳过',
-              estimatedTotalMessages: 0,
-              exportedMessages: 0
-            }, { force: true })
-            return 'done'
-          }
-
           const sessionProgress = (progress: ExportProgress) => {
             const phaseTotal = Number.isFinite(progress.total) && progress.total > 0 ? progress.total : 100
             const phaseCurrent = Number.isFinite(progress.current) ? progress.current : 0
@@ -10339,6 +10496,7 @@ class ExportService {
           } else {
             failCount++
             failedSessionIds.push(sessionId)
+            failedSessionErrors[sessionId] = result.error || '导出失败'
             console.error(`导出 ${sessionId} 失败:`, result.error)
           }
 
@@ -10433,6 +10591,7 @@ class ExportService {
           pendingSessionIds,
           successSessionIds,
           failedSessionIds,
+          failedSessionErrors,
           sessionOutputPaths
         }
       }
@@ -10445,6 +10604,7 @@ class ExportService {
           pendingSessionIds,
           successSessionIds,
           failedSessionIds,
+          failedSessionErrors,
           sessionOutputPaths
         }
       }
@@ -10458,7 +10618,20 @@ class ExportService {
       }, { force: true })
       progressEmitter.flush()
 
-      return { success: true, successCount, failCount, successSessionIds, failedSessionIds, sessionOutputPaths }
+      const allFailed = successCount === 0 && failCount > 0
+      const failureSummary = allFailed
+        ? Object.values(failedSessionErrors).slice(0, 3).join('；') || '所有会话导出失败'
+        : undefined
+      return {
+        success: !allFailed,
+        successCount,
+        failCount,
+        successSessionIds,
+        failedSessionIds,
+        failedSessionErrors,
+        sessionOutputPaths,
+        error: failureSummary
+      }
     } catch (e) {
       progressEmitter.flush()
       return { success: false, successCount, failCount, error: String(e) }
diff --git a/electron/services/imageDecryptService.ts b/electron/services/imageDecryptService.ts
index 90c5f81..66552b4 100644
--- a/electron/services/imageDecryptService.ts
+++ b/electron/services/imageDecryptService.ts
@@ -81,6 +81,7 @@ export class ImageDecryptService {
   private pending = new Map<string, Promise<DecryptResult>>()
   private updateFlags = new Map<string, boolean>()
   private nativeLogged = false
+  private runtimeConfig: { dbPath?: string; myWxid?: string; imageXorKey?: unknown; imageAesKey?: string } | null = null
   private datNameScanMissAt = new Map<string, number>()
   private readonly datNameScanMissTtlMs = 1200
   private readonly accountDirCache = new Map<string, string>()
@@ -99,6 +100,32 @@ export class ImageDecryptService {
     return this.shouldEmitImageEvents(payload)
   }
 
+  setRuntimeConfig(config: { dbPath?: string; myWxid?: string; imageXorKey?: unknown; imageAesKey?: string } | null): void {
+    this.runtimeConfig = config
+  }
+
+  private getConfiguredDbPath(): string {
+    return String(this.runtimeConfig?.dbPath || this.configService.get('dbPath') || '').trim()
+  }
+
+  private getConfiguredMyWxid(): string {
+    return String(this.runtimeConfig?.myWxid || this.configService.get('myWxid') || '').trim()
+  }
+
+  private getConfiguredImageKeys(): { xorKey: unknown; aesKey: string } {
+    const runtimeImageXorKey = this.runtimeConfig?.imageXorKey
+    const hasRuntimeXorKey = runtimeImageXorKey !== undefined && runtimeImageXorKey !== null && String(runtimeImageXorKey).trim() !== ''
+    const runtimeAesKey = String(this.runtimeConfig?.imageAesKey || '').trim()
+    if (hasRuntimeXorKey || runtimeAesKey) {
+      const fallback = this.configService.getImageKeysForCurrentWxid()
+      return {
+        xorKey: hasRuntimeXorKey ? runtimeImageXorKey : fallback.xorKey,
+        aesKey: runtimeAesKey || fallback.aesKey
+      }
+    }
+    return this.configService.getImageKeysForCurrentWxid()
+  }
+
   private logInfo(message: string, meta?: Record<string, unknown>): void {
     if (!this.configService.get('logEnabled')) return
     const timestamp = new Date().toISOString()
@@ -266,8 +293,8 @@ export class ImageDecryptService {
     )
     if (normalizedList.length === 0) return
 
-    const wxid = this.configService.get('myWxid')
-    const dbPath = this.configService.get('dbPath')
+    const wxid = this.getConfiguredMyWxid()
+    const dbPath = this.getConfiguredDbPath()
     if (!wxid || !dbPath) return
 
     const accountDir = this.resolveAccountDir(dbPath, wxid)
@@ -294,8 +321,8 @@ export class ImageDecryptService {
     this.logInfo('开始解密图片', { md5: payload.imageMd5, datName: payload.imageDatName, force: payload.force, hardlinkOnly: payload.hardlinkOnly === true })
     this.emitDecryptProgress(payload, cacheKey, 'locating', 14, 'running')
     try {
-      const wxid = this.configService.get('myWxid')
-      const dbPath = this.configService.get('dbPath')
+      const wxid = this.getConfiguredMyWxid()
+      const dbPath = this.getConfiguredDbPath()
       if (!wxid || !dbPath) {
         this.logError('配置缺失', undefined, { wxid: !!wxid, dbPath: !!dbPath })
         this.emitDecryptProgress(payload, cacheKey, 'failed', 100, 'error', '配置缺失')
@@ -404,7 +431,7 @@ export class ImageDecryptService {
       }
 
       // 优先使用当前 wxid 对应的密钥，找不到则回退到全局配置
-      const imageKeys = this.configService.getImageKeysForCurrentWxid()
+      const imageKeys = this.getConfiguredImageKeys()
       const xorKeyRaw = imageKeys.xorKey
       // 支持十六进制格式（如 0x53）和十进制格式
       let xorKey: number
@@ -427,7 +454,7 @@ export class ImageDecryptService {
       const aesKeyText = typeof aesKeyRaw === 'string' ? aesKeyRaw.trim() : ''
       const aesKeyForNative = aesKeyText || undefined
 
-      this.logInfo('开始解密DAT文件(仅Rust原生)', { datPath, xorKey, hasAesKey: Boolean(aesKeyForNative) })
+      this.logInfo('开始解密DAT文件', { datPath, xorKey, hasAesKey: Boolean(aesKeyForNative) })
       this.emitDecryptProgress(payload, cacheKey, 'decrypting', 58, 'running')
       const nativeResult = this.tryDecryptDatWithNative(datPath, xorKey, aesKeyForNative)
       if (!nativeResult) {
@@ -527,8 +554,8 @@ export class ImageDecryptService {
   }
 
   private resolveCurrentAccountDir(): string | null {
-    const wxid = this.configService.get('myWxid')
-    const dbPath = this.configService.get('dbPath')
+    const wxid = this.getConfiguredMyWxid()
+    const dbPath = this.getConfiguredDbPath()
     if (!wxid || !dbPath) return null
     return this.resolveAccountDir(dbPath, wxid)
   }
@@ -1551,7 +1578,117 @@ export class ImageDecryptService {
         })
       }
     }
-    return result
+    if (result) return result
+    const fallback = this.tryDecryptDatWithJs(datPath, xorKey, aesKey)
+    if (fallback) {
+      this.logInfo('JS DAT 解密 fallback 已启用', { datPath, ext: fallback.ext })
+    }
+    return fallback
+  }
+
+  private tryDecryptDatWithJs(
+    datPath: string,
+    xorKey: number,
+    aesKey?: string
+  ): { data: Buffer; ext: string; isWxgf: boolean } | null {
+    try {
+      const encrypted = readFileSync(datPath)
+      const directExt = this.detectImageExtension(encrypted)
+      if (directExt) return { data: encrypted, ext: directExt, isWxgf: false }
+
+      const candidates: Buffer[] = []
+      const aesKeyText = String(aesKey || '').trim()
+      const datVersion = this.getDatVersion(encrypted)
+      if (datVersion === 2 && aesKeyText.length >= 16) {
+        try {
+          candidates.push(this.decryptDatV4WithJs(encrypted, xorKey, Buffer.from(aesKeyText, 'ascii').subarray(0, 16)))
+        } catch { }
+      }
+      if (datVersion !== 2) {
+        candidates.push(this.decryptDatV3WithJs(encrypted, xorKey))
+      }
+
+      for (const candidate of candidates) {
+        const ext = this.detectImageExtension(candidate)
+        if (ext) return { data: candidate, ext, isWxgf: false }
+      }
+    } catch (error) {
+      this.logError('JS DAT 解密 fallback 失败', error, { datPath })
+    }
+    return null
+  }
+
+  private decryptDatV3WithJs(data: Buffer, xorKey: number): Buffer {
+    const output = Buffer.allocUnsafe(data.length)
+    for (let i = 0; i < data.length; i += 1) {
+      output[i] = data[i] ^ xorKey
+    }
+    return output
+  }
+
+  private decryptDatV4WithJs(data: Buffer, xorKey: number, aesKey: Buffer): Buffer {
+    if (data.length < 0x0f) {
+      throw new Error('dat file too small')
+    }
+    const header = data.subarray(0, 0x0f)
+    const payload = data.subarray(0x0f)
+    const aesSize = this.readInt32LeSafe(header, 6)
+    const xorSize = this.readInt32LeSafe(header, 10)
+    const remainder = ((aesSize % 16) + 16) % 16
+    const alignedAesSize = aesSize + (16 - remainder)
+    if (alignedAesSize > payload.length) throw new Error('invalid aes size')
+
+    const aesData = payload.subarray(0, alignedAesSize)
+
+    let plainAes = Buffer.alloc(0)
+    if (aesData.length > 0) {
+      const decipher = crypto.createDecipheriv('aes-128-ecb', aesKey, Buffer.alloc(0))
+      decipher.setAutoPadding(false)
+      plainAes = this.strictRemovePkcs7Padding(Buffer.concat([decipher.update(aesData), decipher.final()]))
+    }
+
+    const remaining = payload.subarray(alignedAesSize)
+    if (xorSize < 0 || xorSize > remaining.length) throw new Error('invalid xor size')
+
+    let rawData = Buffer.alloc(0)
+    let decodedXor = Buffer.alloc(0)
+    if (xorSize > 0) {
+      const rawLength = remaining.length - xorSize
+      if (rawLength < 0) throw new Error('invalid raw size')
+      rawData = remaining.subarray(0, rawLength)
+      const xorData = remaining.subarray(rawLength)
+      decodedXor = Buffer.allocUnsafe(xorData.length)
+      for (let i = 0; i < xorData.length; i += 1) {
+        decodedXor[i] = xorData[i] ^ xorKey
+      }
+    } else {
+      rawData = remaining
+    }
+    return Buffer.concat([plainAes, rawData, decodedXor])
+  }
+
+  private getDatVersion(data: Buffer): number {
+    if (data.length < 6) return 0
+    const sigV1 = Buffer.from([0x07, 0x08, 0x56, 0x31, 0x08, 0x07])
+    const sigV2 = Buffer.from([0x07, 0x08, 0x56, 0x32, 0x08, 0x07])
+    if (data.subarray(0, 6).equals(sigV1)) return 1
+    if (data.subarray(0, 6).equals(sigV2)) return 2
+    return 0
+  }
+
+  private readInt32LeSafe(buffer: Buffer, offset: number): number {
+    if (offset < 0 || offset + 4 > buffer.length) throw new Error('invalid int32 offset')
+    return buffer[offset] | (buffer[offset + 1] << 8) | (buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)
+  }
+
+  private strictRemovePkcs7Padding(data: Buffer): Buffer {
+    if (data.length === 0) throw new Error('empty decrypted data')
+    const pad = data[data.length - 1]
+    if (pad <= 0 || pad > 16 || pad > data.length) throw new Error('invalid pkcs7 padding')
+    for (let i = data.length - pad; i < data.length; i += 1) {
+      if (data[i] !== pad) throw new Error('invalid pkcs7 padding')
+    }
+    return data.subarray(0, data.length - pad)
   }
 
   private detectImageExtension(buffer: Buffer): string | null {
diff --git a/resources/wcdb/linux/x64/libwcdb_api.so b/resources/wcdb/linux/x64/libwcdb_api.so
index d5feb7a..3c29db5 100644
Binary files a/resources/wcdb/linux/x64/libwcdb_api.so and b/resources/wcdb/linux/x64/libwcdb_api.so differ
diff --git a/resources/wcdb/macos/universal/libwcdb_api.dylib b/resources/wcdb/macos/universal/libwcdb_api.dylib
index bc24c25..af13abb 100644
Binary files a/resources/wcdb/macos/universal/libwcdb_api.dylib and b/resources/wcdb/macos/universal/libwcdb_api.dylib differ
diff --git a/resources/wcdb/win32/arm64/wcdb_api.dll b/resources/wcdb/win32/arm64/wcdb_api.dll
index cd1799c..33f9cc1 100644
Binary files a/resources/wcdb/win32/arm64/wcdb_api.dll and b/resources/wcdb/win32/arm64/wcdb_api.dll differ
diff --git a/resources/wcdb/win32/x64/wcdb_api.dll b/resources/wcdb/win32/x64/wcdb_api.dll
index c223d45..bf072ff 100644
Binary files a/resources/wcdb/win32/x64/wcdb_api.dll and b/resources/wcdb/win32/x64/wcdb_api.dll differ
diff --git a/src/pages/ExportPage.tsx b/src/pages/ExportPage.tsx
index d0829c3..758a1ca 100644
--- a/src/pages/ExportPage.tsx
+++ b/src/pages/ExportPage.tsx
@@ -5192,6 +5192,7 @@ function ExportPage() {
       exportConcurrency: sourceOptions.exportConcurrency,
       fileNamingMode: exportDefaultFileNamingMode,
       sessionLayout,
+      exportWriteLayout: writeLayout,
       sessionNameWithTypePrefix,
       dateRange: sourceOptions.useAllTime
         ? null
@@ -6008,9 +6009,10 @@ function ExportPage() {
         }
     return {
       ...task.template.optionTemplate,
+      exportWriteLayout: task.template.optionTemplate.exportWriteLayout || writeLayout,
       dateRange
     }
-  }, [])
+  }, [writeLayout])
 
   const enqueueAutomationTask = useCallback((
     task: ExportAutomationTask,
diff --git a/src/types/electron.d.ts b/src/types/electron.d.ts
index a58e075..1d25a0e 100644
--- a/src/types/electron.d.ts
+++ b/src/types/electron.d.ts
@@ -1101,6 +1101,7 @@ export interface ElectronAPI {
       pendingSessionIds?: string[]
       successSessionIds?: string[]
       failedSessionIds?: string[]
+      failedSessionErrors?: Record<string, string>
       sessionOutputPaths?: Record<string, string>
       error?: string
     }>
@@ -1269,6 +1270,7 @@ export interface ExportOptions {
   txtColumns?: string[]
   fileNamingMode?: 'classic' | 'date-range'
   sessionLayout?: 'shared' | 'per-session'
+  exportWriteLayout?: 'A' | 'B' | 'C'
   sessionNameWithTypePrefix?: boolean
   displayNamePreference?: 'group-nickname' | 'remark' | 'nickname'
   exportConcurrency?: number