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-select/nuget/MyGet.ps1

@@ -0,0 +1,20 @@
+# set env vars usually set by MyGet (enable for local testing)
+#$env:SourcesPath = '..'
+#$env:NuGet = "./nuget.exe" #https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
+
+$nuget = $env:NuGet
+
+# parse the version number out of package.json
+$bsversionParts = ((Get-Content $env:SourcesPath\package.json) -join "`n" | ConvertFrom-Json).version.split('-', 2) # split the version on the '-'
+$bsversion = $bsversionParts[0]
+
+if ($bsversionParts.Length -gt 1)
+{
+    $bsversion += '-' + $bsversionParts[1].replace('.', '').replace('-', '_')   # strip out invalid chars from the PreRelease part
+}
+
+# update sourceMappingURL in bootstrap-select.min.js
+(Get-Content $env:SourcesPath\dist\js\bootstrap-select.min.js).replace("sourceMappingURL=", "sourceMappingURL=Scripts/") | Set-Content $env:SourcesPath\dist\js\bootstrap-select.min.js
+
+# create packages
+& $nuget pack "$env:SourcesPath\nuget\bootstrap-select.nuspec" -Verbosity detailed -NonInteractive -NoPackageAnalysis -BasePath $env:SourcesPath -Version $bsversion

public/assets/libs/bootstrap-select/nuget/bootstrap-select.nuspec

@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
+    <metadata>
+        <id>bootstrap-select</id>
+        <version>1.11.2</version>
+        <title>bootstrap-select</title>
+        <authors>Silvio Moreto,Ana Carolina,caseyjhol,Matt Bryson,and t0xicCode.</authors>
+        <owners>Silvio Moreto</owners>
+        <projectUrl>https://github.com/silviomoreto/bootstrap-select</projectUrl>
+        <description>Bootstrap-select is a jQuery plugin that utilizes Bootstrap's dropdown.js to style and bring additional functionality to standard select elements.</description>
+        <tags>bootstrap dropdown select</tags>
+        <requireLicenseAcceptance>false</requireLicenseAcceptance>
+        <dependencies>
+            <dependency id="jQuery" version="1.8.0" />
+        </dependencies>
+    </metadata>
+    <files>
+        <file src="dist\js\bootstrap-select*.*" target="content\Scripts" />
+        <file src="dist\js\i18n\*.*" target="content\Scripts\i18n" />
+        <file src="dist\css\*.*" target="content\Content" />
+    </files>
+</package>