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/toolsCommon/package.json

@@ -0,0 +1,17 @@
+{
+	"id":"toolsCommon",
+	"name":"toolsCommon",
+	"title":"toos setting",
+	"version":"1.1",
+	"hidden":1,
+	"source":{
+		"className":"x-item-file x-ini"
+	},
+	"description":"some configs",
+	"auther":{
+		"copyright":"kodcloud.",
+		"homePage":"http://www.kodcloud.com",
+	},
+	"configItem":{
+	}
+}