更新附件追加功能，新增removeAnnotations参数以控制注释移除逻辑，优化文件上传接口调用。

app/api/files/files-upload.ts

@@ -231,7 +231,8 @@ export async function appendContractAttachments(
   mergeMode: 'overwrite' | 'new' = 'overwrite',
   isReprocess: boolean = true,
   remark?: string,
-  jwtToken?: string
+  jwtToken?: string,
+  removeAnnotations: boolean = true
 ): Promise<{data: FileUploadResponse; error?: never} | {data?: never; error: string; status?: number}> {
   try {
     console.log('【合同附件追加】开始追加附件:', { documentId, fileCount: files.length, mergeMode });
@@ -247,6 +248,7 @@ export async function appendContractAttachments(
     // 添加其他参数
     formData.append('merge_mode', mergeMode);
     formData.append('is_reprocess', isReprocess.toString());
+    formData.append('remove_annotations', removeAnnotations.toString());
     if (remark) {
       formData.append('remark', remark);
     }