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

addons/translate/library/google-translate-php/tests/UtilityTest.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace Stichoza\GoogleTranslate\Tests;
+
+use ReflectionClass;
+use PHPUnit\Framework\TestCase;
+use Stichoza\GoogleTranslate\GoogleTranslate;
+
+class UtilityTest extends TestCase
+{
+    public $tr;
+
+    public $method;
+
+    public function setUp()
+    {
+        $this->tr = new GoogleTranslate();
+        $reflection = new ReflectionClass(get_class($this->tr));
+        $this->method = $reflection->getMethod('isValidLocale');
+        $this->method->setAccessible(true);
+    }
+
+    public function testIsValidLocale()
+    {
+        $m = $this->method;
+        $t = $this->tr;
+
+        $booleanAssertions = [
+            'ab'      => true,
+            'ab-CD'   => true,
+            'ab-CDE'  => false,
+            'abc-DE'  => false,
+            'abc-DEF' => false,
+            'abc'     => false,
+            'ab-'     => false,
+            'a'       => false,
+        ];
+
+        foreach ($booleanAssertions as $key => $value) {
+            $this->assertEquals($m->invokeArgs($t, [$key]), $value);
+        }
+    }
+
+    public function testSetOptions()
+    {
+        $res = fopen('php://memory', 'r+');
+
+        $this->tr->setOptions([
+            'debug'   => $res,
+            'headers' => [
+                'User-Agent' => 'Foo',
+            ],
+        ])->translate('hello');
+        rewind($res);
+        $output = str_replace("\r", '', stream_get_contents($res));
+        $this->assertContains('User-Agent: Foo', $output);
+
+        GoogleTranslate::trans('world', 'en', null, [
+            'debug'   => $res,
+            'headers' => [
+                'User-Agent' => 'Bar',
+            ],
+        ]);
+        rewind($res);
+        $output = str_replace("\r", '', stream_get_contents($res));
+        $this->assertContains('User-Agent: Bar', $output);
+        fclose($res);
+    }
+}