fix: 修复processSingleInput中input未正确赋值的问题

将data默认值从null改为直接使用input参数，确保输入值被正确处理

Author: Kwisma

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "sub-store-node",
-	"version": "1.1.0",
+	"version": "1.1.1",
 	"private": true,
 	"license": "GPL-3.0",
 	"scripts": {

src/index.js

@@ -48,7 +48,7 @@ export default async function processNodeConversion(urlArray, platform) {
  * @returns {Promise<{data: any, headers: Object}>} 处理后的结果和响应头
  */
 async function processSingleInput(input, platform) {
-    let data = null;
+    let data = input;
     let proxies = [];
     let headers = {};
     const isHttpInput = /^https?:\/\//i.test(input);