feat(annotation): 添加不适用标注状态支持

- 在 AnnotationResultStatus 枚举中新增 NOT_APPLICABLE 状态
- 将无标注/不适用合并为两个独立的状态选项
- 更新前端标签显示逻辑以支持新的状态类型
- 修改确认对话框允许选择不适用状态
- 在后端数据库模型中添加 NOT_APPLICABLE 状态值
- 更新 API schema 描述以反映新的状态选项
- 调整标注状态判断和保存逻辑以处理三种状态
- 更新数据库表结构注释包含新状态类型

frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx

@@ -90,9 +90,11 @@ type SwitchDecision = "save" | "discard" | "cancel";
 const LSF_IFRAME_SRC = "/lsf/lsf.html";
 const TASK_PAGE_START = 0;
 const TASK_PAGE_SIZE = 200;
-const NO_ANNOTATION_LABEL = "无标注/不适用";
+const NO_ANNOTATION_LABEL = "无标注";
+const NOT_APPLICABLE_LABEL = "不适用";
 const NO_ANNOTATION_CONFIRM_TITLE = "没有标注任何内容";
 const NO_ANNOTATION_CONFIRM_OK_TEXT = "设为无标注并保存";
+const NOT_APPLICABLE_CONFIRM_TEXT = "设为不适用并保存";
 const NO_ANNOTATION_CONFIRM_CANCEL_TEXT = "继续标注";
 
 type NormalizedTaskList = {
@@ -140,6 +142,9 @@ const resolveTaskStatusMeta = (item: EditorTaskListItem) => {
   if (item.annotationStatus === AnnotationResultStatus.NO_ANNOTATION) {
     return { text: NO_ANNOTATION_LABEL, type: "warning" as const };
   }
+  if (item.annotationStatus === AnnotationResultStatus.NOT_APPLICABLE) {
+    return { text: NOT_APPLICABLE_LABEL, type: "warning" as const };
+  }
   return { text: "已标注", type: "success" as const };
 };
 
@@ -271,26 +276,32 @@ export default function LabelStudioTextEditor() {
     win.postMessage({ type, payload }, origin);
   }, [origin]);
 
-  const confirmNoAnnotation = useCallback(() => {
-    return new Promise<boolean>((resolve) => {
+  const confirmEmptyAnnotationStatus = useCallback(() => {
+    return new Promise<AnnotationResultStatus | null>((resolve) => {
       let resolved = false;
-      const settle = (value: boolean) => {
+      let modalInstance: { destroy: () => void } | null = null;
+      const settle = (value: AnnotationResultStatus | null) => {
         if (resolved) return;
         resolved = true;
         resolve(value);
+        if (modalInstance) modalInstance.destroy();
       };
-      modal.confirm({
+      const handleNotApplicable = () => settle(AnnotationResultStatus.NOT_APPLICABLE);
+      modalInstance = modal.confirm({
         title: NO_ANNOTATION_CONFIRM_TITLE,
         content: (
           <div className="flex flex-col gap-2">
             <Typography.Text>当前未发现任何标注内容。</Typography.Text>
-            <Typography.Text type="secondary">如确认为无标注/不适用，可继续保存。</Typography.Text>
+            <Typography.Text type="secondary">如确认为无标注或不适用，可继续保存。</Typography.Text>
+            <Button type="link" style={{ padding: 0, height: "auto" }} onClick={handleNotApplicable}>
+              {NOT_APPLICABLE_CONFIRM_TEXT}
+            </Button>
           </div>
         ),
         okText: NO_ANNOTATION_CONFIRM_OK_TEXT,
         cancelText: NO_ANNOTATION_CONFIRM_CANCEL_TEXT,
-        onOk: () => settle(true),
-        onCancel: () => settle(false),
+        onOk: () => settle(AnnotationResultStatus.NO_ANNOTATION),
+        onCancel: () => settle(null),
       });
     });
   }, [modal]);
@@ -588,15 +599,17 @@ export default function LabelStudioTextEditor() {
           : undefined;
 
     const annotationRecord = annotation as Record<string, unknown>;
+    const currentTask = tasks.find((item) => item.fileId === String(fileId));
+    const currentStatus = currentTask?.annotationStatus;
+    const hasExistingAnnotation = !!currentTask?.hasAnnotation;
     let resolvedStatus: AnnotationResultStatus;
     if (isAnnotationResultEmpty(annotationRecord)) {
-      const currentStatus = tasks.find((item) => item.fileId === String(fileId))?.annotationStatus;
-      if (currentStatus === AnnotationResultStatus.NO_ANNOTATION) {
-        resolvedStatus = AnnotationResultStatus.NO_ANNOTATION;
+      if (currentStatus === AnnotationResultStatus.ANNOTATED || (hasExistingAnnotation && !currentStatus)) {
+        resolvedStatus = AnnotationResultStatus.ANNOTATED;
       } else {
-        const confirmed = await confirmNoAnnotation();
-        if (!confirmed) return false;
-        resolvedStatus = AnnotationResultStatus.NO_ANNOTATION;
+        const selectedStatus = await confirmEmptyAnnotationStatus();
+        if (!selectedStatus) return false;
+        resolvedStatus = selectedStatus;
       }
     } else {
       resolvedStatus = AnnotationResultStatus.ANNOTATED;
@@ -651,7 +664,7 @@ export default function LabelStudioTextEditor() {
     }
   }, [
     advanceAfterSave,
-    confirmNoAnnotation,
+    confirmEmptyAnnotationStatus,
     currentSegmentIndex,
     message,
     projectId,

frontend/src/pages/DataAnnotation/annotation.model.ts

@@ -11,6 +11,7 @@ export enum AnnotationTaskStatus {
 export enum AnnotationResultStatus {
   ANNOTATED = "ANNOTATED",
   NO_ANNOTATION = "NO_ANNOTATION",
+  NOT_APPLICABLE = "NOT_APPLICABLE",
 }
 
 export interface AnnotationTask {