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/example/bootstraptable/detail.html

@@ -0,0 +1,33 @@
+<table class="table table-striped">
+    <thead>
+        <tr>
+            <th>{:__('Title')}</th>
+            <th>{:__('Content')}</th>
+        </tr>
+    </thead>
+    <tbody>
+        {volist name="row" id="vo"  }
+        <tr>
+            <td>{$key}</td>
+            <td style="word-break: break-all;">{$vo|htmlentities}</td>
+        </tr>
+        {/volist}
+        {if $Think.get.dialog}
+        <tr>
+            <td>回传数据</td>
+            <td>
+                <div class="input-group">
+                    <input name="callback" class="form-control" value="test" />
+                    <span class="input-group-btn"><a href="javascript:;" class="btn btn-success btn-callback" >回传数据</a></span>
+                </div>
+            </td>
+        </tr>
+        {/if}
+    </tbody>
+</table>
+<div class="hide layer-footer">
+    <label class="control-label col-xs-12 col-sm-2"></label>
+    <div class="col-xs-12 col-sm-8">
+        <button type="reset" class="btn btn-primary btn-embossed btn-close" onclick="Layer.closeAll();">{:__('Close')}</button>
+    </div>
+</div>