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/assets/libs/bootstrap-table/dist/locale/bootstrap-table-nl-NL.min.js

@@ -0,0 +1,7 @@
+/*
+* bootstrap-table - v1.11.1 - 2017-02-22
+* https://github.com/wenzhixin/bootstrap-table
+* Copyright (c) 2017 zhixin wen
+* Licensed MIT License
+*/
+!function(a){"use strict";a.fn.bootstrapTable.locales["nl-NL"]={formatLoadingMessage:function(){return"Laden, even geduld..."},formatRecordsPerPage:function(a){return a+" records per pagina"},formatShowingRows:function(a,b,c){return"Toon "+a+" tot "+b+" van "+c+" record"+(c>1?"s":"")},formatDetailPagination:function(a){return"Toon "+a+" record"+(a>1?"s":"")},formatSearch:function(){return"Zoeken"},formatNoMatches:function(){return"Geen resultaten gevonden"},formatRefresh:function(){return"Vernieuwen"},formatToggle:function(){return"Omschakelen"},formatColumns:function(){return"Kolommen"},formatAllRows:function(){return"Alle"},formatPaginationSwitch:function(){return"Verberg/Toon paginatie"},formatExport:function(){return"Exporteer data"},formatClearFilters:function(){return"Verwijder filters"}},a.extend(a.fn.bootstrapTable.defaults,a.fn.bootstrapTable.locales["nl-NL"])}(jQuery);