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

application/admin/view/kefu/kbs/test_match.html

@@ -0,0 +1,47 @@
+<style type="text/css">
+    .panel-body {
+        padding-top: 0;
+    }
+    .progress {
+        width: 80%;
+        display: none;
+        margin: 0 auto;
+    }
+    .bg-success {
+        padding: 15px;
+    }
+</style>
+<div class="row animated fadeInRight">
+    <div class="col-md-8 col-md-offset-2">
+        <div class="box box-success">
+            <div class="panel-heading tabbable"></div>
+            <div class="panel-body form-horizontal">
+                <p class="bg-success">本功能用于测试两句话的匹配度，以方便您配置知识库自动回复</p>
+                <div class="form-group">
+                    <label for="str1" class="control-label col-xs-12 col-sm-2">语料一:</label>
+                    <div class="col-xs-12 col-sm-8">
+                        <textarea name="str1" id="str1" cols="30" rows="3"></textarea>
+                    </div>
+                </div>
+                <div class="form-group">
+                    <label for="str2" class="control-label col-xs-12 col-sm-2">语料二:</label>
+                    <div class="col-xs-12 col-sm-8">
+                        <textarea name="str2" id="str2" cols="30" rows="3"></textarea>
+                        <span class="help-block">请输入两段语料以测试它们的匹配度</span>
+                    </div>
+                </div>
+                <div class="form-group layer-footer">
+                    <label class="control-label col-xs-12 col-sm-2"></label>
+                    <div class="col-xs-12 col-sm-8">
+                        <button type="button" class="btn btn-success btn-embossed post_test_match">测试匹配度</button>
+                    </div>
+                </div>
+                <div class="progress">
+                    <div class="progress-bar progress-bar-success" id="match" role="progressbar" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100" style="min-width: 20%;width: 100%">
+                        未开始匹配
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>