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
2026-03-30 20:16:32 +08:00
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+<!DOCTYPE html>
+<html>
+<head>
+  <title>Draggable Link Labels That Stay On Path</title>
+  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
+  <meta name="description" content="TypeScript: This variation on the LinkLabelDraggingTool extension restricts link labels to stay on the link's route while the user is dragging it." />
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+
+  <script src="../samples/assets/require.js"></script>
+  <script src="../assets/js/goSamples.js"></script>
+  <!-- this is only for the GoJS Samples framework -->
+  <script id="code">
+    function init() {
+      require(["LinkLabelOnPathDraggingScript"], function(app) {
+        app.init();
+      });
+    }
+  </script>
+</head>
+<body onload="init()">
+  <div id="sample">
+    <div id="myDiagramDiv" style="background-color: whitesmoke; border: solid 1px black; width: 100%; height: 600px"></div>
+    <p>
+      This sample demonstrates a custom Tool, LinkLabelOnPathDraggingTool, that allows the user to drag the label of a Link, but
+      that keeps the label exactly on the path of the link. The tool is defined at <a href="LinkLabelOnPathDraggingTool.ts">LinkLabelOnPathDraggingTool.ts</a>.
+    </p>
+    <p>
+      The label on the link can be any arbitrarily complex object.
+      It is positioned by the <a>GraphObject.segmentIndex</a> and <a>GraphObject.segmentFraction</a> properties.
+      The segmentIndex is set to NaN such that the whole link path acts as the segment, and the segmentFraction is set by the LinkLabelOnPathDraggingTool.
+      A two-way data binding on segmentFraction automatically remembers any modified value on the link data object in the model.
+    </p>
+    <p>
+      The tool is derived from a similar tool, <a href="LinkLabelDraggingTool.ts">LinkLabelDraggingTool.ts</a>, that allows
+      the user to drag the label in any direction from the mid-point of the Link path.
+    </p>
+  </div>
+</body>
+</html>