fix: 修复ArrayBuffer类型错误，使用Uint8Array替代

app/api/enhance/route.ts

@@ -264,16 +264,13 @@ export async function POST(request: NextRequest) {
         formData.on("error", reject);
       });
       
-      // 将Buffer转换为ArrayBuffer用于fetch
-      const arrayBuffer = formDataBuffer.buffer.slice(
-        formDataBuffer.byteOffset,
-        formDataBuffer.byteOffset + formDataBuffer.byteLength
-      );
+      // 将Buffer转换为Uint8Array用于fetch（更兼容）
+      const uint8Array = new Uint8Array(formDataBuffer);
       
       response = await fetch(enhanceUrl, {
         method: "POST",
         headers,
-        body: arrayBuffer,
+        body: uint8Array,
         signal: controller.signal,
       });