优化请求，修复加载bug

src/renderer/utils/music/kw/pic.js

@@ -0,0 +1,9 @@
+import { httpFatch } from '../../request'
+
+export default {
+  getPic({ songmid }) {
+    const requestObj = httpFatch(`http://artistpicserver.kuwo.cn/pic.web?corp=kuwo&type=rid_pic&pictype=500&size=500&rid=${songmid}`)
+    requestObj.promise = requestObj.promise.then(({ body }) => body)
+    return requestObj
+  },
+}