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/adminer/app.php

@@ -0,0 +1,26 @@
+<?php
+class adminerPlugin extends PluginBase{
+	function __construct(){
+		parent::__construct();
+	}
+	public function regiest(){
+		$this->hookRegiest(array(
+			'templateCommonHeader' => 'adminerPlugin.addMenu'
+		));
+	}
+	public function addMenu(){
+		$config = $this->getConfig();
+		$subMenu = $config['menuSubMenu'];
+		navbar_menu_add(array(
+			'name'		=> 'Adminer',
+			'icon'		=> $this->appIcon(),
+			'url'		=> $this->pluginApi,
+			'target'	=> '_blank',
+			'subMenu'	=> $subMenu,
+			'use'		=> '1'
+		));
+	}
+	public function index(){
+		header('Location: '.$this->pluginHost.'adminer/');
+	}
+}