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/app/template/common/footer.html

@@ -0,0 +1,26 @@
+<div class="common-footer aero">
+	<?php 
+		$settings = $GLOBALS['config']['settings'];
+		$settingSystem = $GLOBALS['config']['settingSystem'];
+		$copyrightInfo = LNG('copyright_info',APP_HOST);
+		if(is_wap()){
+			echo '<span class="pr-10"><a href="javascript:void(0);" forceWap="1">'.LNG('wap_page_phone').'</a> | '.
+				 '<a href="javascript:void(0);" forceWap="0">'.LNG('wap_page_pc').'</a></span> ';
+			echo $copyrightInfo.' v'.KOD_VERSION;
+		}else{
+			echo '<span class="copyright-content">';
+			if(isset($settings['copyright'])){
+				echo $settings['copyright'];
+			}else{
+				echo LNG('copyright_pre').' v'.KOD_VERSION.' | '.$copyrightInfo;
+			}
+			echo '<a href="javascript:core.copyright();" class="icon-info-sign copyright-bottom pl-5"></a>';
+			if(isset($settingSystem['globalIcp'])){
+				echo "&nbsp;&nbsp;  ".$settingSystem['globalIcp'];
+			}
+			echo '</span>';
+		}
+	?>
+</div>
+<!-- https://getfirebug.com/firebuglite -->
+<?php include(TEMPLATE.'common/footerCommon.html');?>