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/data/session/sess_068gqunfo1vcf3orve3jl2e65i

@@ -0,0 +1 @@
+kod|i:1;kodUser|a:10:{s:4:"name";s:5:"admin";s:4:"path";s:5:"admin";s:8:"password";s:32:"dab8398412a1f07151e476ddb3be9a16";s:6:"userID";s:1:"1";s:4:"role";s:1:"1";s:6:"config";a:2:{s:7:"sizeMax";s:1:"0";s:7:"sizeUse";i:1024;}s:9:"groupInfo";a:1:{i:1;s:5:"write";}s:10:"createTime";i:1708160661;s:6:"status";i:1;s:9:"lastLogin";i:1708160678;}kodLogin|b:1;X-CSRF-TOKEN|s:20:"kSWQXXJ6uzHdUNCVvGZ9";

public/GoJS-master/learn/kod/data/session/sess_69icjcd69soesobius8farnq7n

@@ -0,0 +1 @@
+kod|i:1;

public/GoJS-master/learn/kod/data/session/sess_6eq6e0o8uaekj22f1djbo15763

@@ -0,0 +1 @@
+kod|i:1;

public/GoJS-master/learn/kod/data/session/sess_qgl5arlio0td6nrg3lf8pk4prd

@@ -0,0 +1 @@
+kod|i:1;