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/blacklist/index.html

@@ -0,0 +1,25 @@
+<div class="panel panel-default panel-intro">
+    {:build_heading()}
+
+    <div class="panel-body">
+        <div id="myTabContent" class="tab-content">
+            <div class="tab-pane fade active in" id="one">
+                <div class="widget-body no-padding">
+                    <div id="toolbar" class="toolbar">
+                        <a href="javascript:;" class="btn btn-primary btn-refresh" title="{:__('Refresh')}" ><i class="fa fa-refresh"></i> </a>
+                        <a href="javascript:;" class="btn btn-success btn-add {:$auth->check('kefu/blacklist/add')?'':'hide'}" title="{:__('Add')}" ><i class="fa fa-plus"></i> {:__('Add')}</a>
+                        <a href="javascript:;" class="btn btn-success btn-edit btn-disabled disabled {:$auth->check('kefu/blacklist/edit')?'':'hide'}" title="{:__('Edit')}" ><i class="fa fa-pencil"></i> {:__('Edit')}</a>
+                        <a href="javascript:;" class="btn btn-danger btn-del btn-disabled disabled {:$auth->check('kefu/blacklist/del')?'':'hide'}" title="{:__('Delete')}" ><i class="fa fa-trash"></i> {:__('Delete')}</a>
+                        
+                    </div>
+                    <table id="table" class="table table-striped table-bordered table-hover table-nowrap"
+                           data-operate-edit="{:$auth->check('kefu/blacklist/edit')}" 
+                           data-operate-del="{:$auth->check('kefu/blacklist/del')}" 
+                           width="100%">
+                    </table>
+                </div>
+            </div>
+
+        </div>
+    </div>
+</div>