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/routes/documents._index.tsx

@@ -794,7 +794,8 @@ export default function DocumentsIndex() {
         attachmentMergeMode,
         true, // isReprocess
         attachmentRemark || undefined,
-        loaderData.frontendJWT as string | undefined
+        loaderData.frontendJWT as string | undefined,
+        true // removeAnnotations
       );
 
       if (result.error) {
@@ -1064,7 +1065,7 @@ export default function DocumentsIndex() {
             <i className="ri-download-line"></i>
             下载
           </button>
-          {record.type === 1 && record.fileStatus === 'Processed' && (
+          {record.type === '1' && record.fileStatus === 'Processed' && (
             <>
               <button 
                 type="button"

app/routes/files.upload.tsx

@@ -921,7 +921,8 @@ export default function FilesUpload() {
         attachmentMergeMode,
         true, // isReprocess
         attachmentRemark || undefined,
-        loaderData.frontendJWT as string | undefined
+        loaderData.frontendJWT as string | undefined,
+        true // removeAnnotations
       );
 
       if (result.error) {