diff --git a/frontend/public/lsf/lsf.html b/frontend/public/lsf/lsf.html
index 80c90bd..91a6f7f 100644
--- a/frontend/public/lsf/lsf.html
+++ b/frontend/public/lsf/lsf.html
@@ -200,6 +200,18 @@
           // 最小化对齐 Label Studio Server 的字段（DataMate 侧会原样存储）
           const taskId = typeof currentTask?.id === "number" ? currentTask.id : Number(currentTask?.id) || null;
           const fileId = currentTask?.data?.file_id || currentTask?.data?.fileId || null;
+          const segmentIndexValue =
+            currentTask?.data?.segment_index ??
+            currentTask?.data?.segmentIndex ??
+            currentTask?.data?.dm_segment_index ??
+            currentTask?.data?.dmSegmentIndex ??
+            null;
+          const segmentIndex =
+            segmentIndexValue === null || segmentIndexValue === undefined
+              ? null
+              : Number.isFinite(Number(segmentIndexValue))
+                ? Number(segmentIndexValue)
+                : null;
 
           annotationPayload.id = typeof annotationPayload.id === "number" ? annotationPayload.id : taskId || 1;
           annotationPayload.task = taskId;
@@ -209,6 +221,7 @@
           return {
             taskId,
             fileId,
+            segmentIndex,
             annotation: annotationPayload,
           };
         }
diff --git a/frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx b/frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx
index 0caf5bd..b754d19 100644
--- a/frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx
+++ b/frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useRef, useState } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { App, Button, Card, List, Spin, Typography, Tag } from "antd";
 import { LeftOutlined, ReloadOutlined, SaveOutlined, MenuFoldOutlined, MenuUnfoldOutlined, CheckOutlined } from "@ant-design/icons";
 import { useNavigate, useParams } from "react-router";
@@ -29,7 +29,7 @@ type EditorTaskListItem = {
 
 type LsfMessage = {
   type?: string;
-  payload?: any;
+  payload?: unknown;
 };
 
 type SegmentInfo = {
@@ -40,8 +40,57 @@ type SegmentInfo = {
   hasAnnotation: boolean;
 };
 
+type ApiResponse<T> = {
+  code?: number;
+  message?: string;
+  data?: T;
+};
+
+type EditorTaskPayload = {
+  id?: number | string;
+  data?: Record<string, unknown>;
+  annotations?: unknown[];
+};
+
+type EditorTaskResponse = {
+  task?: EditorTaskPayload;
+  segmented?: boolean;
+  segments?: SegmentInfo[];
+  currentSegmentIndex?: number;
+};
+
+type EditorTaskListResponse = {
+  content?: EditorTaskListItem[];
+};
+
+type ExportPayload = {
+  taskId?: number | string | null;
+  fileId?: string | null;
+  segmentIndex?: number | string | null;
+  annotation?: Record<string, unknown>;
+};
+
 const LSF_IFRAME_SRC = "/lsf/lsf.html";
 
+const resolveSegmentIndex = (value: unknown) => {
+  if (value === null || value === undefined) return undefined;
+  const parsed = Number(value);
+  return Number.isFinite(parsed) ? parsed : undefined;
+};
+
+const normalizePayload = (payload: unknown): ExportPayload | undefined => {
+  if (!payload || typeof payload !== "object") return undefined;
+  return payload as ExportPayload;
+};
+
+const resolvePayloadMessage = (payload: unknown) => {
+  if (!payload || typeof payload !== "object") return undefined;
+  if ("message" in payload && typeof (payload as { message?: unknown }).message === "string") {
+    return (payload as { message?: string }).message;
+  }
+  return undefined;
+};
+
 export default function LabelStudioTextEditor() {
   const { projectId = "" } = useParams();
   const navigate = useNavigate();
@@ -69,17 +118,17 @@ export default function LabelStudioTextEditor() {
   const [segments, setSegments] = useState<SegmentInfo[]>([]);
   const [currentSegmentIndex, setCurrentSegmentIndex] = useState(0);
 
-  const postToIframe = (type: string, payload?: any) => {
+  const postToIframe = useCallback((type: string, payload?: unknown) => {
     const win = iframeRef.current?.contentWindow;
     if (!win) return;
     win.postMessage({ type, payload }, origin);
-  };
+  }, [origin]);
 
-  const loadProject = async () => {
+  const loadProject = useCallback(async () => {
     setLoadingProject(true);
     try {
-      const resp = (await getEditorProjectInfoUsingGet(projectId)) as any;
-      const data = resp?.data as EditorProjectInfo | undefined;
+      const resp = (await getEditorProjectInfoUsingGet(projectId)) as ApiResponse<EditorProjectInfo>;
+      const data = resp?.data;
       if (!data?.projectId) {
         message.error("获取标注项目信息失败");
         setProject(null);
@@ -93,18 +142,21 @@ export default function LabelStudioTextEditor() {
     } finally {
       setLoadingProject(false);
     }
-  };
+  }, [message, projectId]);
 
-  const loadTasks = async (silent = false) => {
+  const loadTasks = useCallback(async (silent = false) => {
     if (!projectId) return;
     if (!silent) setLoadingTasks(true);
     try {
-      const resp = (await listEditorTasksUsingGet(projectId, { page: 0, size: 200 })) as any;
-      const content = (resp?.data?.content || []) as EditorTaskListItem[];
+      const resp = (await listEditorTasksUsingGet(projectId, {
+        page: 0,
+        size: 200,
+      })) as ApiResponse<EditorTaskListResponse>;
+      const content = resp?.data?.content || [];
       const items = Array.isArray(content) ? content : [];
       setTasks(items);
-      if (!selectedFileId && items.length > 0) {
-        setSelectedFileId(items[0].fileId);
+      if (items.length > 0) {
+        setSelectedFileId((prev) => prev || (items[0]?.fileId ?? ""));
       }
     } catch (e) {
       console.error(e);
@@ -113,9 +165,9 @@ export default function LabelStudioTextEditor() {
     } finally {
       if (!silent) setLoadingTasks(false);
     }
-  };
+  }, [message, projectId]);
 
-  const initEditorForFile = async (fileId: string, segmentIdx?: number) => {
+  const initEditorForFile = useCallback(async (fileId: string, segmentIdx?: number) => {
     if (!project?.supported) return;
     if (!project?.labelConfig) {
       message.error("该项目未绑定标注模板，无法加载编辑器");
@@ -131,7 +183,7 @@ export default function LabelStudioTextEditor() {
     try {
       const resp = (await getEditorTaskUsingGet(projectId, fileId, {
         segmentIndex: segmentIdx,
-      })) as any;
+      })) as ApiResponse<EditorTaskResponse>;
       const data = resp?.data;
       const task = data?.task;
       if (!task) {
@@ -151,10 +203,25 @@ export default function LabelStudioTextEditor() {
         setCurrentSegmentIndex(0);
       }
 
-      expectedTaskIdRef.current = Number(task?.id) || null;
+      const taskData = {
+        ...(task?.data || {}),
+        file_id: fileId,
+        fileId: fileId,
+      };
+      if (data?.segmented) {
+        const segmentIndex = resolveSegmentIndex(data.currentSegmentIndex) ?? 0;
+        taskData.segment_index = segmentIndex;
+        taskData.segmentIndex = segmentIndex;
+      }
+      const taskForIframe = {
+        ...task,
+        data: taskData,
+      };
+
+      expectedTaskIdRef.current = Number(taskForIframe?.id) || null;
       postToIframe("LS_INIT", {
         labelConfig: project.labelConfig,
-        task,
+        task: taskForIframe,
         user: { id: "datamate" },
         // 完整的 Label Studio 原生界面配置
         interfaces: [
@@ -188,30 +255,44 @@ export default function LabelStudioTextEditor() {
     } finally {
       if (seq === initSeqRef.current) setLoadingTaskDetail(false);
     }
-  };
+  }, [iframeReady, message, postToIframe, project, projectId]);
 
-  const saveFromExport = async (payload: any) => {
-    const fileId = payload?.fileId;
+  const saveFromExport = useCallback(async (payload?: ExportPayload | null) => {
+    const payloadTaskId = payload?.taskId;
+    if (expectedTaskIdRef.current && payloadTaskId) {
+      if (Number(payloadTaskId) !== expectedTaskIdRef.current) {
+        message.warning("已忽略过期的保存请求");
+        return;
+      }
+    }
+    const fileId = payload?.fileId || selectedFileId;
     const annotation = payload?.annotation;
-    if (!fileId || !annotation) {
+    if (!fileId || !annotation || typeof annotation !== "object") {
       message.error("导出标注失败：缺少 fileId/annotation");
       return;
     }
+    const payloadSegmentIndex = resolveSegmentIndex(payload?.segmentIndex);
+    const segmentIndex =
+      payloadSegmentIndex !== undefined
+        ? payloadSegmentIndex
+        : segmented
+          ? currentSegmentIndex
+          : undefined;
 
     setSaving(true);
     try {
       await upsertEditorAnnotationUsingPut(projectId, String(fileId), {
         annotation,
-        segmentIndex: segmented ? currentSegmentIndex : undefined,
+        segmentIndex,
       });
       message.success("标注已保存");
       await loadTasks(true);
 
       // 分段模式下更新当前段落的标注状态
-      if (segmented) {
+      if (segmented && segmentIndex !== undefined) {
         setSegments((prev) =>
           prev.map((seg) =>
-            seg.idx === currentSegmentIndex
+            seg.idx === segmentIndex
               ? { ...seg, hasAnnotation: true }
               : seg
           )
@@ -223,7 +304,14 @@ export default function LabelStudioTextEditor() {
     } finally {
       setSaving(false);
     }
-  };
+  }, [
+    currentSegmentIndex,
+    loadTasks,
+    message,
+    projectId,
+    segmented,
+    selectedFileId,
+  ]);
 
   const requestExport = () => {
     if (!selectedFileId) {
@@ -254,20 +342,17 @@ export default function LabelStudioTextEditor() {
     setCurrentSegmentIndex(0);
 
     if (projectId) loadProject();
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [projectId]);
+  }, [projectId, loadProject]);
 
   useEffect(() => {
     if (!project?.supported) return;
     loadTasks();
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [project?.projectId, project?.supported]);
+  }, [project?.supported, loadTasks]);
 
   useEffect(() => {
     if (!selectedFileId) return;
     initEditorForFile(selectedFileId);
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [selectedFileId, iframeReady]);
+  }, [selectedFileId, iframeReady, initEditorForFile]);
 
   useEffect(() => {
     const handler = (event: MessageEvent<LsfMessage>) => {
@@ -280,8 +365,10 @@ export default function LabelStudioTextEditor() {
         return;
       }
 
+      const payload = normalizePayload(msg.payload);
+
       if (msg.type === "LS_READY") {
-        const readyTaskId = msg.payload?.taskId;
+        const readyTaskId = payload?.taskId;
         if (expectedTaskIdRef.current && readyTaskId) {
           if (Number(readyTaskId) !== expectedTaskIdRef.current) return;
         }
@@ -290,25 +377,26 @@ export default function LabelStudioTextEditor() {
       }
 
       if (msg.type === "LS_EXPORT_RESULT") {
-        saveFromExport(msg.payload);
+        saveFromExport(payload);
         return;
       }
 
       // 兼容 iframe 内部在 submit 时直接上报（若启用）
       if (msg.type === "LS_SUBMIT") {
-        saveFromExport(msg.payload);
+        saveFromExport(payload);
         return;
       }
 
       if (msg.type === "LS_ERROR") {
-        message.error(msg.payload?.message || "编辑器发生错误");
+        const payloadMessage = resolvePayloadMessage(msg.payload);
+        message.error(payloadMessage || "编辑器发生错误");
         setLsReady(false);
       }
     };
 
     window.addEventListener("message", handler);
     return () => window.removeEventListener("message", handler);
-  }, [message, origin]);
+  }, [message, origin, saveFromExport]);
 
   if (loadingProject) {
     return (
diff --git a/runtime/datamate-python/app/module/annotation/service/editor.py b/runtime/datamate-python/app/module/annotation/service/editor.py
index 30c8098..f8b6632 100644
--- a/runtime/datamate-python/app/module/annotation/service/editor.py
+++ b/runtime/datamate-python/app/module/annotation/service/editor.py
@@ -43,6 +43,11 @@ TEXT_DATA_KEY = "text"
 DATASET_ID_KEY = "dataset_id"
 FILE_ID_KEY = "file_id"
 FILE_NAME_KEY = "file_name"
+DATASET_ID_CAMEL_KEY = "datasetId"
+FILE_ID_CAMEL_KEY = "fileId"
+FILE_NAME_CAMEL_KEY = "fileName"
+SEGMENT_INDEX_KEY = "segment_index"
+SEGMENT_INDEX_CAMEL_KEY = "segmentIndex"
 TEXTUAL_OBJECT_CATEGORIES = {"text", "document"}
 OBJECT_NAME_HEADER_PREFIX = "dm_object_header_"
 
@@ -252,9 +257,13 @@ class AnnotationEditorService:
         if self._needs_placeholder(data.get(TEXT_DATA_KEY)):
             data[TEXT_DATA_KEY] = display_text
 
-        data.setdefault(FILE_ID_KEY, file_id)
-        data.setdefault(DATASET_ID_KEY, dataset_id)
-        data.setdefault(FILE_NAME_KEY, getattr(file_record, "file_name", ""))
+        file_name = str(getattr(file_record, "file_name", ""))
+        data[FILE_ID_KEY] = file_id
+        data[FILE_ID_CAMEL_KEY] = file_id
+        data[DATASET_ID_KEY] = dataset_id
+        data[DATASET_ID_CAMEL_KEY] = dataset_id
+        data[FILE_NAME_KEY] = file_name
+        data[FILE_NAME_CAMEL_KEY] = file_name
 
         self._apply_text_placeholders(data, label_config)
         return data
@@ -418,6 +427,10 @@ class AnnotationEditorService:
             dataset_id=project.dataset_id,
             file_id=file_id,
         )
+        if needs_segmentation:
+            task_data[SEGMENT_INDEX_KEY] = current_segment_index
+            task_data[SEGMENT_INDEX_CAMEL_KEY] = current_segment_index
+
         task: Dict[str, Any] = {
             "id": ls_task_id,
             "data": task_data,