feat(annotation): 添加标注数据导出功能

- 新增导出对话框组件，支持多种格式选择
- 实现 JSON、JSONL、CSV、COCO、YOLO 五种导出格式
- 添加导出统计信息显示，包括总文件数和已标注数
- 集成前端导出按钮和后端 API 接口
- 支持仅导出已标注数据和包含原始数据选项
- 实现文件下载和命名功能

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

@@ -1,5 +1,8 @@
 import { get, post, put, del, download } from "@/utils/request";
 
+// 导出格式类型
+export type ExportFormat = "json" | "jsonl" | "csv" | "coco" | "yolo";
+
 // 标注任务管理相关接口
 export function queryAnnotationTasksUsingGet(params?: any) {
   return get("/api/annotation/project", params);
@@ -62,30 +65,60 @@ export function getAutoAnnotationTaskStatusUsingGet(taskId: string) {
   return get(`/api/annotation/auto/${taskId}/status`);
 }
 
-export function downloadAutoAnnotationResultUsingGet(taskId: string) {
-  return download(`/api/annotation/auto/${taskId}/download`);
-}
-
-// =====================
-// Label Studio Editor（内嵌版）
-// =====================
-
-export function getEditorProjectInfoUsingGet(projectId: string) {
-  return get(`/api/annotation/editor/projects/${projectId}`);
-}
-
-export function listEditorTasksUsingGet(projectId: string, params?: any) {
-  return get(`/api/annotation/editor/projects/${projectId}/tasks`, params);
-}
-
-export function getEditorTaskUsingGet(projectId: string, fileId: string) {
-  return get(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}`);
-}
-
-export function upsertEditorAnnotationUsingPut(
-  projectId: string,
-  fileId: string,
-  data: any
-) {
-  return put(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}/annotation`, data);
-}
+export function downloadAutoAnnotationResultUsingGet(taskId: string) {
+  return download(`/api/annotation/auto/${taskId}/download`);
+}
+
+// =====================
+// Label Studio Editor（内嵌版）
+// =====================
+
+export function getEditorProjectInfoUsingGet(projectId: string) {
+  return get(`/api/annotation/editor/projects/${projectId}`);
+}
+
+export function listEditorTasksUsingGet(projectId: string, params?: any) {
+  return get(`/api/annotation/editor/projects/${projectId}/tasks`, params);
+}
+
+export function getEditorTaskUsingGet(projectId: string, fileId: string) {
+  return get(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}`);
+}
+
+export function upsertEditorAnnotationUsingPut(
+  projectId: string,
+  fileId: string,
+  data: any
+) {
+  return put(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}/annotation`, data);
+}
+
+// =====================
+// 标注数据导出
+// =====================
+
+export interface ExportStatsResponse {
+  projectId: string;
+  projectName: string;
+  totalFiles: number;
+  annotatedFiles: number;
+  exportFormat: string;
+}
+
+export function getExportStatsUsingGet(projectId: string) {
+  return get(`/api/annotation/export/projects/${projectId}/stats`);
+}
+
+export function downloadAnnotationsUsingGet(
+  projectId: string,
+  format: ExportFormat = "json",
+  onlyAnnotated: boolean = true,
+  includeData: boolean = false
+) {
+  const params = new URLSearchParams({
+    format,
+    only_annotated: String(onlyAnnotated),
+    include_data: String(includeData),
+  });
+  return download(`/api/annotation/export/projects/${projectId}/download?${params.toString()}`);
+}