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/admin/lang/zh-cn/app/his_order.php

@@ -0,0 +1,24 @@
+<?php
+
+return [
+    'Id'                => '主键',
+    'Serial_no'         => '订单流水号',
+    'User_id'           => '客户ID',
+    'Createtime'        => '下单时间',
+    'Symbol'            => '交易币种',
+    'Trade_num'         => '交易数量',
+    'Trade_cycle'       => '交易周期秒',
+    'Expect_percent'    => '预期收益比',
+    'Expect_income'     => '预期收益',
+    'Current_price'     => '下单价格',
+    'Close_price'       => '平仓价格',
+    'Trade_result_num'  => '盈亏数量',
+    'Order_hash'        => '订单Hash',
+    'Open_time'         => '结算时间',
+    'Trade_result'      => '交易结果',
+    'Trade_result win'  => '盈',
+    'Trade_result loss' => '亏',
+    'Rise_or_fall'      => '涨跌',
+    'Rise_or_fall rise' => '涨',
+    'Rise_or_fall fall' => '跌'
+];