feat: 更新默认反代IP生成逻辑，支持动态获取并优化代码结构

Author: cmliu

_worker.js

@@ -38,12 +38,12 @@ export default {
 		调试日志打印 = ['1', 'true'].includes(env.DEBUG) || 调试日志打印;
 		预加载竞速拨号 = ['1', 'true'].includes(env.PRELOAD_RACE_DIAL) || 预加载竞速拨号;
 		if (TCP并发拨号数 !== 1 && 识别运营商(request) === 'cmcc') TCP并发拨号数 = 1;
-		let 默认反代IP = '', 默认反代兜底 = true;
+		let 默认反代IP = (`${request.cf.colo}.${特征码字典[0]}.${特征码字典[1]}SsSs.nEt`).toLowerCase(), 默认反代兜底 = true;
 		if (env.PROXYIP) {
 			const proxyIPs = await 整理成数组(env.PROXYIP);
 			默认反代IP = proxyIPs[Math.floor(Math.random() * proxyIPs.length)];
 			默认反代兜底 = false;
-		} else 默认反代IP = (`${request.cf.colo}.${特征码字典[0]}.${特征码字典[1]}SsSs.nEt`).toLowerCase();
+		};
 		const 访问IP = request.headers.get('CF-Connecting-IP') || request.headers.get('True-Client-IP') || request.headers.get('X-Real-IP') || request.headers.get('X-Forwarded-For') || request.headers.get('Fly-Client-IP') || request.headers.get('X-Appengine-Remote-Addr') || request.headers.get('X-Cluster-Client-IP') || '未知IP';
 		if (缓存SOCKS5白名单 === null) {
 			if (env.GO2SOCKS5) SOCKS5白名单 = [...new Set(SOCKS5白名单.concat(await 整理成数组(env.GO2SOCKS5)))];