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/extensionsJSM/ZoomSlider.css

@@ -0,0 +1,89 @@
+.zoomSlider {
+  position: absolute;
+  padding: 0;
+  opacity: .75;
+  z-index: 99;
+  width: 125px;
+  height: 25px;
+  top: 0px;
+  left: 0px;
+}
+
+.zoomButton {
+  display: inline-block;
+  vertical-align: top;
+  text-align: center;
+  padding: 0;
+  transition: opacity .2s;
+}
+
+.zoomRangeContainer {
+  display: inline-block;
+  vertical-align: top;
+  padding: 0;
+}
+
+.zoomRangeInput {
+  margin: 0;
+  padding: 0;
+  outline: none;
+  transition: opacity .2s;
+  background: transparent;
+  -webkit-appearance: none;
+}
+
+/* Set up additional styling to ensure consistenty across browsers */
+.zoomRangeInput::-webkit-slider-runnable-track {
+  box-sizing: border-box;
+  border: none;
+  width: 100%;
+  height: 3px;
+  background: #ccc;
+}
+.zoomRangeInput::-moz-range-track {
+  box-sizing: border-box;
+  border: none;
+  width: 100%;
+  height: 3px;
+  background: #ccc;
+}
+.zoomRangeInput::-ms-track {
+  box-sizing: border-box;
+  border: none;
+  width: 100%;
+  height: 3px;
+  background: #ccc;
+  color: transparent;
+}
+.zoomRangeInput::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  margin-top: -3.33px;
+  box-sizing: border-box;
+  border: none;
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+  background: #444;
+}
+.zoomRangeInput::-moz-range-thumb {
+  box-sizing: border-box;
+  border: none;
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+  background: #444;
+}
+.zoomRangeInput::-ms-thumb {
+  margin-top: 0;
+  box-sizing: border-box;
+  border: none;
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+  background: #444;
+}
+.zoomRangeInput::-ms-tooltip,
+.zoomRangeInput::-ms-fill-lower,
+.zoomRangeInput::-ms-fill-upper {
+  display: none;
+}