feat(annotation): 支持从XML配置解析标注任务模板

- 添加 XML 配置解析功能，支持从 Label Studio XML 格式提取 objects 和 labels
- 优化模板配置加载逻辑，优先使用 configuration 字段，否则从 labelConfig 解析
- 增加对多种数据对象类型的解析支持（Image、Text、Audio 等）
- 实现标签控件类型的完整解析（Choices、Labels、RectangleLabels 等）

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

@@ -121,18 +121,29 @@ export default function CreateAnnotationTask({
               });
               setSelectedDatasetId(taskDetail.datasetId);
 
-              // 填充模板配置
-              if (taskDetail.configuration) {
-                const { objects, labels } = taskDetail.configuration;
+              // 配置可能在 template.configuration 或 taskDetail.configuration
+              const configuration = taskDetail.template?.configuration || taskDetail.configuration;
+              const labelConfig = taskDetail.template?.labelConfig || taskDetail.labelConfig;
+
+              // 设置 XML 配置用于预览
+              if (labelConfig) {
+                setCustomXml(labelConfig);
+              }
+
+              // 填充模板配置：优先使用 configuration，否则从 labelConfig 解析
+              if (configuration && configuration.objects?.length > 0) {
+                const { objects, labels } = configuration;
                 manualForm.setFieldsValue({
                   objects: objects || [],
                   labels: labels || [],
                 });
-              }
-
-              // 设置 XML 配置用于预览
-              if (taskDetail.labelConfig) {
-                setCustomXml(taskDetail.labelConfig);
+              } else if (labelConfig) {
+                // 从 XML 解析配置
+                const parsed = parseXmlToConfig(labelConfig);
+                manualForm.setFieldsValue({
+                  objects: parsed.objects,
+                  labels: parsed.labels,
+                });
               }
 
               // 编辑模式始终使用 custom 配置模式（不改变结构，只改标签）
@@ -243,6 +254,80 @@ export default function CreateAnnotationTask({
     }
   };
 
+  // 从 Label Studio XML 配置解析出 objects 和 labels
+  const parseXmlToConfig = (xml: string): { objects: any[], labels: any[] } => {
+    const objects: any[] = [];
+    const labels: any[] = [];
+
+    try {
+      const parser = new DOMParser();
+      const doc = parser.parseFromString(xml, "text/xml");
+
+      // 数据对象类型列表
+      const objectTypes = ["Image", "Text", "Audio", "Video", "HyperText", "Header", "Paragraphs", "TimeSeries", "TimeSeriesChannel"];
+      // 标签控件类型列表
+      const controlTypes = ["Choices", "Labels", "RectangleLabels", "PolygonLabels", "EllipseLabels", "KeyPointLabels", "BrushLabels", "TextArea", "Number", "DateTime", "Rating", "Taxonomy"];
+
+      // 解析数据对象
+      objectTypes.forEach(type => {
+        const elements = doc.getElementsByTagName(type);
+        for (let i = 0; i < elements.length; i++) {
+          const el = elements[i];
+          const name = el.getAttribute("name") || "";
+          const value = el.getAttribute("value") || "";
+          if (name) {
+            objects.push({ name, type, value });
+          }
+        }
+      });
+
+      // 解析标签控件
+      controlTypes.forEach(type => {
+        const elements = doc.getElementsByTagName(type);
+        for (let i = 0; i < elements.length; i++) {
+          const el = elements[i];
+          const fromName = el.getAttribute("name") || "";
+          const toName = el.getAttribute("toName") || "";
+          const required = el.getAttribute("required") === "true";
+
+          if (fromName) {
+            const label: any = {
+              fromName,
+              toName,
+              type,
+              required,
+            };
+
+            // 解析选项/标签值
+            if (type === "Choices") {
+              const choices: string[] = [];
+              const choiceElements = el.getElementsByTagName("Choice");
+              for (let j = 0; j < choiceElements.length; j++) {
+                const value = choiceElements[j].getAttribute("value");
+                if (value) choices.push(value);
+              }
+              label.options = choices;
+            } else if (["Labels", "RectangleLabels", "PolygonLabels", "EllipseLabels", "KeyPointLabels", "BrushLabels"].includes(type)) {
+              const labelValues: string[] = [];
+              const labelElements = el.getElementsByTagName("Label");
+              for (let j = 0; j < labelElements.length; j++) {
+                const value = labelElements[j].getAttribute("value");
+                if (value) labelValues.push(value);
+              }
+              label.labels = labelValues;
+            }
+
+            labels.push(label);
+          }
+        }
+      });
+    } catch (e) {
+      console.error("Failed to parse XML config:", e);
+    }
+
+    return { objects, labels };
+  };
+
   const generateXmlFromConfig = (objects: any[], labels: any[]) => {
     let xml = '<View>\n';