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/extensions/DataInspector.css

@@ -0,0 +1,53 @@
+/*
+Default CSS for the Data inspector
+see also: DataInspector.js, DataInspector.html
+*/
+
+/*
+  Grey color palette
+  https://www.google.com/design/spec/style/color.html
+/*   #FAFAFA; /* Grey 50  */
+/*   #F5F5F5; /* Grey 100 */
+/*   #EEEEEE; /* Grey 200 */
+/*   #E0E0E0; /* Grey 300 */
+/*   #BDBDBD; /* Grey 400 */
+/*   #9E9E9E; /* Grey 500 */
+/*   #757575; /* Grey 600 */
+/*   #616161; /* Grey 700 */
+/*   #424242; /* Grey 800 */
+/*   #212121; /* Grey 900 */
+
+.inspector {
+  display: inline-block;
+  font: bold 14px helvetica, sans-serif;
+  background-color: #212121; /* Grey 900 */
+  color: #F5F5F5; /* Grey 100 */
+  cursor: default;
+}
+
+.inspector table {
+  border-collapse: separate;
+  border-spacing: 2px;
+}
+
+.inspector td, th {
+  padding: 2px;
+}
+
+.inspector input {
+  background-color: #424242; /* Grey 800 */
+  color: #F5F5F5; /* Grey 100 */
+  font: bold 12px helvetica, sans-serif;
+  border: 0px;
+  padding: 2px;
+}
+
+.inspector input:disabled {
+  background-color: #BDBDBD; /* Grey 400 */
+  color: #616161; /* Grey 700 */
+}
+
+.inspector select {
+  background-color: #424242;
+}
+