docx、xlsx、pdf、图片等文件预览功能添加

src/service/api/file.ts

@@ -0,0 +1,18 @@
+import { request } from '../request';
+
+// 上传文件
+export function uploadFileApi(id: number, params: any) {
+  return request({
+    url: `/api/changes/${id}/attachments`,
+    method: 'post',
+    data: params
+  });
+}
+
+// 删除文件
+export function deleteFileApi(id: number, fileId: number) {
+  return request({
+    url: `/api/changes/${id}/attachments/${fileId}`,
+    method: 'delete',
+  });
+}