完成

src/utils/file-utils.ts

@@ -91,7 +91,18 @@ export async function getImageBuffer(text: string, apiKey: string) {
   }
 }
 
-export async function blobToArrayBuffer(blob:Blob) {
-  const arrayBuffer = await blob.arrayBuffer();
-  return arrayBuffer;
+export async function blobToArrayBuffer(blobOrArrayBuffer: Blob | ArrayBuffer): Promise<ArrayBuffer> {
+  if (blobOrArrayBuffer instanceof ArrayBuffer) {
+    // 如果输入已经是 ArrayBuffer，则直接返回
+    return blobOrArrayBuffer;
+  }
+
+  if (blobOrArrayBuffer instanceof Blob) {
+    // 否则转换 Blob 为 ArrayBuffer
+    const arrayBuffer = await blobOrArrayBuffer.arrayBuffer();
+    return arrayBuffer;
+  }
+
+  throw new Error('输入必须是 Blob 或 ArrayBuffer');
 }
+