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

public/GoJS-master/learn/kod/plugins/officeLive/i18n/en.php

@@ -0,0 +1,15 @@
+<?php
+return array(
+	"officeLive.meta.name"				=> "Officelive Viewer",
+	"officeLive.meta.title"				=> "Officelive Viewer",
+	"officeLive.meta.desc"				=> "Officelive Viewer",
+
+	"officeLive.Config.apiServer"		=> "Server Api",
+	"officeLive.Config.apiServerDesc"	=> "<div class='can-select pt-10'>
+		The address of the preview server must be accessible by the server where the server can access kods can use third party services, or Microsoft's official interface <br/> (Kod server must be in the external network, and the need for domain name access)
+		<div class = 'grayy 8'> https://owa-box.vips100.com/op/view.aspx?src= </div>
+		<div class = 'grayy 8'> https://docview.mingdao.com/op/view.aspx?src= </div>
+		<div class = 'grayy 8'> https://preview.tita.com/op/view.aspx?src= </div>
+		<div class = 'grayy 8'> https://view.officeapps.live.com/op/view.aspx?src= </div>
+		Users can build their own; <a href='https://kodcloud.com/help/show-5.html' target='_blank'> learn more </a></div>"
+);