feat: 后端全量更新 - 含所有本次需求

- Contract.php: 返回合约账户余额(balance_contract)
- My.php: 地址管理增加BTC/ETH
- AppContract.php: 一键平仓(closeall)
- AppProxy.php: 代理专属注册链接 + 分级权限(L1/L2)
- site.php: 手续费减半(0.018→0.009)
- agent_permission_setup.sql: 代理权限SQL
- crypto_news_crawler.py: 新闻自动采集脚本

application/api/lang/urd/cycle.php

@@ -0,0 +1,19 @@
+<?php
+
+return [
+    "请选择交易对" => "Select Pair",
+    "请输入正确的交易数量" => "Please Enter Correct Amount",
+    "请选择交易周期" => "Please Select Period Time",
+    "请选择交易涨跌" => "Please Select the Changes",
+    "请先完成实名认证" => "Please Complete KYC Verification",
+    "交易对不存在" => "Invalid Pair",
+    "交易周期错误" => "Error Period Time",
+    "账号余额不足" => "Low Balance",
+    "该周期需拥有资产:" => "Asset Unavailable:",
+    "操作频繁" => "Operations Frequent",
+    "提交成功" => "Succeed",
+    "请选择要取消的订单" => "Please Select the Oder You would Like to Cancel",
+    "订单不存在" => "Invalid Order",
+    "订单超时，不能取消" => "Order has been past，cannot cancel",
+    "系统繁忙" => "System Busy",
+];