feat(annotation): 添加数据集预览功能

- 引入 previewDatasetUsingGet API 接口用于数据集预览
- 添加数据集预览相关的状态管理（可见性、数据、加载状态等）
- 实现 handlePreviewDataset 函数用于获取并展示数据集预览数据
- 在数据集选择区域添加预览按钮，点击可查看数据集内容
- 添加数据集预览弹窗组件，以表格形式展示数据集内容
- 移除原有的 XML 编辑标签页，简化模板配置界面
- 更新表单项标签结构，集成预览按钮到数据集选择区域

frontend/src/pages/DataAnnotation/Create/components/CreateAnnotationTaskDialog.tsx

@@ -1,8 +1,9 @@
-import { queryDatasetsUsingGet } from "@/pages/DataManagement/dataset.api";
+import { queryDatasetsUsingGet, previewDatasetUsingGet } from "@/pages/DataManagement/dataset.api";
 import { mapDataset } from "@/pages/DataManagement/dataset.const";
-import { Button, Form, Input, Modal, Select, message, Tabs, Radio } from "antd";
+import { Button, Form, Input, Modal, Select, message, Radio, Table } from "antd";
 import TextArea from "antd/es/input/TextArea";
 import { useEffect, useState } from "react";
+import { Eye } from "lucide-react";
 import {
   createAnnotationTaskUsingPost,
   queryAnnotationTemplatesUsingGet,
@@ -32,10 +33,15 @@ export default function CreateAnnotationTask({
   const [showPreview, setShowPreview] = useState(false);
   const [previewTaskData, setPreviewTaskData] = useState<Record<string, any>>({});
   const [configMode, setConfigMode] = useState<"template" | "custom">("template");
-  const [templateEditTab, setTemplateEditTab] = useState<"visual" | "xml">("visual");
   // 是否已选择模板（用于启用受限编辑模式）
   const [hasSelectedTemplate, setHasSelectedTemplate] = useState(false);
 
+  // 数据集预览相关状态
+  const [datasetPreviewVisible, setDatasetPreviewVisible] = useState(false);
+  const [datasetPreviewData, setDatasetPreviewData] = useState<any[]>([]);
+  const [datasetPreviewLoading, setDatasetPreviewLoading] = useState(false);
+  const [selectedDatasetId, setSelectedDatasetId] = useState<string | null>(null);
+
   useEffect(() => {
     if (!open) return;
     const fetchData = async () => {
@@ -77,11 +83,35 @@ export default function CreateAnnotationTask({
       setShowPreview(false);
       setPreviewTaskData({});
       setConfigMode("template");
-      setTemplateEditTab("visual");
       setHasSelectedTemplate(false);
+      setSelectedDatasetId(null);
+      setDatasetPreviewData([]);
     }
   }, [open, manualForm]);
 
+  // 预览数据集
+  const handlePreviewDataset = async () => {
+    if (!selectedDatasetId) {
+      message.warning("请先选择数据集");
+      return;
+    }
+    setDatasetPreviewLoading(true);
+    try {
+      const res = await previewDatasetUsingGet(selectedDatasetId, { limit: 10 });
+      if (res.code === 200 && res.data) {
+        setDatasetPreviewData(res.data || []);
+        setDatasetPreviewVisible(true);
+      } else {
+        message.error("获取数据集预览失败");
+      }
+    } catch (error) {
+      console.error("Preview dataset error:", error);
+      message.error("获取数据集预览失败");
+    } finally {
+      setDatasetPreviewLoading(false);
+    }
+  };
+
   const generateXmlFromConfig = (objects: any[], labels: any[]) => {
     let xml = '<View>\n';
 
@@ -118,16 +148,6 @@ export default function CreateAnnotationTask({
     return xml;
   };
 
-  // 从表单值同步生成 XML
-  const syncFormToXml = () => {
-    const objects = manualForm.getFieldValue("objects");
-    const labels = manualForm.getFieldValue("labels");
-    if (objects && objects.length > 0) {
-      const xml = generateXmlFromConfig(objects, labels || []);
-      setCustomXml(xml);
-    }
-  };
-
   // 根据 objects 配置生成预览用的示例数据
   const generateExampleData = (objects: any[]) => {
     const exampleUrls: Record<string, string> = {
@@ -307,7 +327,22 @@ export default function CreateAnnotationTask({
           {/* 数据集 与 标注工程名称 并排显示（数据集在左） */}
           <div className="grid grid-cols-2 gap-4">
             <Form.Item
-              label="数据集"
+              label={
+                <div className="flex items-center justify-between w-full">
+                  <span>数据集</span>
+                  <Button
+                    type="link"
+                    size="small"
+                    icon={<Eye size={14} />}
+                    disabled={!selectedDatasetId}
+                    loading={datasetPreviewLoading}
+                    onClick={handlePreviewDataset}
+                    className="p-0 h-auto"
+                  >
+                    预览
+                  </Button>
+                </div>
+              }
               name="datasetId"
               rules={[{ required: true, message: "请选择数据集" }]}
             >
@@ -328,6 +363,7 @@ export default function CreateAnnotationTask({
                   };
                 })}
                 onChange={(value) => {
+                  setSelectedDatasetId(value);
                   // 如果用户未手动修改名称，则用数据集名称作为默认任务名
                   if (!nameManuallyEdited) {
                     const ds = datasets.find((d) => d.id === value);
@@ -442,53 +478,12 @@ export default function CreateAnnotationTask({
                 />
               </Form.Item>
 
-              <Tabs
-                activeKey={templateEditTab}
-                onChange={(key) => {
-                  // 切换到 XML 时，从表单同步生成 XML
-                  if (key === "xml") {
-                    syncFormToXml();
-                  }
-                  setTemplateEditTab(key as "visual" | "xml");
-                }}
-                size="small"
-                items={[
-                  {
-                    key: "visual",
-                    label: "可视化配置",
-                    children: (
-                      <div style={{ maxHeight: '350px', overflowY: 'auto' }}>
-                        <TemplateConfigurationForm
-                          form={manualForm}
-                          restrictedMode={hasSelectedTemplate}
-                        />
-                      </div>
-                    ),
-                  },
-                  {
-                    key: "xml",
-                    label: hasSelectedTemplate ? "XML配置（只读）" : "XML编辑器（高级）",
-                    children: (
-                      <div>
-                        <div className="mb-2 text-xs text-gray-500">
-                          {hasSelectedTemplate
-                            ? "基于模板创建时，XML 配置为只读。如需完全自定义，请切换'自定义配置'模式。"
-                            : "直接编辑 Label Studio XML 配置。注意：在此修改后切换回可视化配置可能会丢失部分高级设置。"
-                          }
-                        </div>
-                        <TextArea
-                          rows={10}
-                          value={customXml}
-                          onChange={(e) => setCustomXml(e.target.value)}
-                          placeholder="<View>...</View>"
-                          style={{ fontFamily: 'monospace', fontSize: 12 }}
-                          disabled={hasSelectedTemplate}
-                        />
-                      </div>
-                    ),
-                  },
-                ]}
-              />
+              <div style={{ maxHeight: '350px', overflowY: 'auto' }}>
+                <TemplateConfigurationForm
+                  form={manualForm}
+                  restrictedMode={hasSelectedTemplate}
+                />
+              </div>
             </div>
           ) : (
             <div className="bg-gray-50 p-4 rounded-md border border-gray-200" style={{ maxHeight: '400px', overflowY: 'auto' }}>
@@ -523,6 +518,43 @@ export default function CreateAnnotationTask({
           )}
         </div>
       </Modal>
+
+      {/* 数据集预览弹窗 */}
+      <Modal
+        open={datasetPreviewVisible}
+        onCancel={() => setDatasetPreviewVisible(false)}
+        title="数据集预览"
+        width={900}
+        footer={[
+          <Button key="close" onClick={() => setDatasetPreviewVisible(false)}>
+            关闭
+          </Button>
+        ]}
+      >
+        <Table
+          dataSource={datasetPreviewData}
+          columns={
+            datasetPreviewData.length > 0
+              ? Object.keys(datasetPreviewData[0]).map((key) => ({
+                  title: key,
+                  dataIndex: key,
+                  key: key,
+                  ellipsis: true,
+                  render: (value: any) => {
+                    if (typeof value === 'object') {
+                      return JSON.stringify(value);
+                    }
+                    return String(value ?? '');
+                  },
+                }))
+              : []
+          }
+          rowKey={(_, index) => String(index)}
+          pagination={false}
+          scroll={{ x: 'max-content', y: 400 }}
+          size="small"
+        />
+      </Modal>
     </>
   );
 }