feat: add conversation export feature to JSONL for AI training (#4037)

* Initial plan

* Add conversation export functionality (backend and frontend)

Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>

* Address code review feedback: move imports, simplify logic, improve i18n

Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>

* Simplify frontend download logic: remove redundant Blob wrapper and complex filename parsing

Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>

* fix: update conversation export filename format for consistency

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>
Co-authored-by: Soulter <905617992@qq.com>

dashboard/src/i18n/locales/en-US/features/conversation.json

@@ -13,7 +13,8 @@
     "refresh": "Refresh"
   },
   "batch": {
-    "deleteSelected": "Delete Selected ({count})"
+    "deleteSelected": "Delete Selected ({count})",
+    "exportSelected": "Export Selected ({count})"
   },
   "pagination": {
     "itemsPerPage": "Items per page",
@@ -76,7 +77,8 @@
       "message": "Are you sure you want to delete the selected {count} conversations? This action cannot be undone, please proceed with caution!",
       "andMore": "and {count} more",
       "cancel": "Cancel",
-      "confirm": "Batch Delete"
+      "confirm": "Batch Delete",
+      "warning": "Warning: This action cannot be undone!"
     }
   },
   "messages": {
@@ -92,6 +94,9 @@
     "noItemSelected": "Please select conversations to delete first",
     "batchDeleteSuccess": "Successfully deleted {count} conversations",
     "batchDeleteError": "Batch delete failed",
-    "batchDeletePartial": "Delete completed: {deleted} successful, {failed} failed"
+    "batchDeletePartial": "Delete completed: {deleted} successful, {failed} failed",
+    "exportSuccess": "Export successful",
+    "exportError": "Export failed",
+    "noItemSelectedForExport": "Please select conversations to export first"
   }
 } 

dashboard/src/i18n/locales/zh-CN/features/conversation.json

@@ -13,7 +13,8 @@
     "refresh": "刷新"
   },
   "batch": {
-    "deleteSelected": "删除选中 ({count})"
+    "deleteSelected": "删除选中 ({count})",
+    "exportSelected": "导出选中 ({count})"
   },
   "pagination": {
     "itemsPerPage": "每页",
@@ -76,7 +77,8 @@
       "message": "确定要删除选中的 {count} 个对话吗？此操作不可恢复，请谨慎操作！",
       "andMore": "等 {count} 个",
       "cancel": "取消",
-      "confirm": "批量删除"
+      "confirm": "批量删除",
+      "warning": "警告：此操作不可撤销！"
     }
   },
   "messages": {
@@ -92,6 +94,9 @@
     "noItemSelected": "请先选择要删除的对话",
     "batchDeleteSuccess": "成功删除 {count} 个对话",
     "batchDeleteError": "批量删除失败",
-    "batchDeletePartial": "删除完成：成功 {deleted} 个，失败 {failed} 个"
+    "batchDeletePartial": "删除完成：成功 {deleted} 个，失败 {failed} 个",
+    "exportSuccess": "导出成功",
+    "exportError": "导出失败",
+    "noItemSelectedForExport": "请先选择要导出的对话"
   }
 } 

dashboard/src/views/ConversationPage.vue

@@ -40,6 +40,17 @@
                         :loading="loading" size="small" class="mr-2">
                         {{ tm('history.refresh') }}
                     </v-btn>
+                    <v-btn 
+                        v-if="selectedItems.length > 0" 
+                        color="success" 
+                        prepend-icon="mdi-download"
+                        variant="tonal" 
+                        @click="exportConversations" 
+                        :disabled="loading"
+                        size="small"
+                        class="mr-2">
+                        {{ tm('batch.exportSelected', { count: selectedItems.length }) }}
+                    </v-btn>
                     <v-btn 
                         v-if="selectedItems.length > 0" 
                         color="error" 
@@ -910,6 +921,53 @@ export default {
             }
         },
 
+        // 导出选中的对话
+        async exportConversations() {
+            if (this.selectedItems.length === 0) {
+                this.showErrorMessage(this.tm('messages.noItemSelectedForExport'));
+                return;
+            }
+
+            this.loading = true;
+            try {
+                // 准备导出的数据
+                const conversations = this.selectedItems.map(item => ({
+                    user_id: item.user_id,
+                    cid: item.cid
+                }));
+
+                const response = await axios.post('/api/conversation/export', {
+                    conversations: conversations
+                }, {
+                    responseType: 'blob' // 重要：告诉 axios 响应是一个 blob
+                });
+
+                // 创建一个下载链接
+                const url = window.URL.createObjectURL(response.data);
+                const link = document.createElement('a');
+                link.href = url;
+                
+                // 生成文件名（使用时间戳）
+                const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, -5);
+                const filename = `conversations_export_${timestamp}.jsonl`;
+                
+                link.setAttribute('download', filename);
+                document.body.appendChild(link);
+                link.click();
+                
+                // 清理
+                link.remove();
+                window.URL.revokeObjectURL(url);
+                
+                this.showSuccessMessage(this.tm('messages.exportSuccess'));
+            } catch (error) {
+                console.error(this.tm('messages.exportError'), error);
+                this.showErrorMessage(error.response?.data?.message || error.message || this.tm('messages.exportError'));
+            } finally {
+                this.loading = false;
+            }
+        },
+
         // 格式化时间戳
         formatTimestamp(timestamp) {
             if (!timestamp) return this.tm('status.unknown');