diff --git a/electron/services/exportService.ts b/electron/services/exportService.ts
index 7e57c05..f5e750b 100644
--- a/electron/services/exportService.ts
+++ b/electron/services/exportService.ts
@@ -1605,6 +1605,14 @@ class ExportService {
     }
   }
 
+  private getWeflowHeader(): { version: string; exportedAt: number; generator: string } {
+    return {
+      version: '1.0.3',
+      exportedAt: Math.floor(Date.now() / 1000),
+      generator: 'WeFlow'
+    }
+  }
+
   /**
    * 生成通用的导出元数据 (参考 ChatLab 格式)
    */
@@ -1657,6 +1665,12 @@ class ExportService {
 
       const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange)
       const allMessages = collected.rows
+
+      // 如果没有消息,不创建文件
+      if (allMessages.length === 0) {
+        return { success: false, error: '该会话在指定时间范围内没有消息' }
+      }
+
       if (isGroup) {
         await this.mergeGroupMembers(sessionId, collected.memberSet, options.exportAvatars === true)
       }
@@ -1850,6 +1864,12 @@ class ExportService {
       })
 
       const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange)
+
+      // 如果没有消息,不创建文件
+      if (collected.rows.length === 0) {
+        return { success: false, error: '该会话在指定时间范围内没有消息' }
+      }
+
       const { exportMediaEnabled, mediaRootDir, mediaRelativePrefix } = this.getMediaLayout(outputPath, options)
 
       // ========== 阶段1：并行导出媒体文件 ==========
@@ -2005,7 +2025,9 @@ class ExportService {
         options.displayNamePreference || 'remark'
       )
 
+      const weflow = this.getWeflowHeader()
       const detailedExport: any = {
+        weflow,
         session: {
           wxid: sessionId,
           nickname: sessionNickname,
@@ -2090,6 +2112,10 @@ class ExportService {
 
       const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange)
 
+      // 如果没有消息,不创建文件
+      if (collected.rows.length === 0) {
+        return { success: false, error: '该会话在指定时间范围内没有消息' }
+      }
 
       onProgress?.({
         current: 30,
@@ -2443,6 +2469,12 @@ class ExportService {
       })
 
       const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange)
+
+      // 如果没有消息,不创建文件
+      if (collected.rows.length === 0) {
+        return { success: false, error: '该会话在指定时间范围内没有消息' }
+      }
+
       const sortedMessages = collected.rows.sort((a, b) => a.createTime - b.createTime)
 
       const { exportMediaEnabled, mediaRootDir, mediaRelativePrefix } = this.getMediaLayout(outputPath, options)
@@ -2614,6 +2646,12 @@ class ExportService {
       })
 
       const collected = await this.collectMessages(sessionId, cleanedMyWxid, options.dateRange)
+
+      // 如果没有消息,不创建文件
+      if (collected.rows.length === 0) {
+        return { success: false, error: '该会话在指定时间范围内没有消息' }
+      }
+
       if (isGroup) {
         await this.mergeGroupMembers(sessionId, collected.memberSet, options.exportAvatars === true)
       }
diff --git a/package.json b/package.json
index 9011c0e..46ab5a0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "weflow",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "WeFlow",
   "main": "dist-electron/main.js",
   "author": "cc",
diff --git a/src/pages/GroupAnalyticsPage.tsx b/src/pages/GroupAnalyticsPage.tsx
index 3cb07c1..1a8dfe1 100644
--- a/src/pages/GroupAnalyticsPage.tsx
+++ b/src/pages/GroupAnalyticsPage.tsx
@@ -56,7 +56,7 @@ function GroupAnalyticsPage() {
 
   useEffect(() => {
     loadGroups()
-  }, [loadGroups])
+  }, [])
 
   useEffect(() => {
     if (searchQuery) {