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/TranslationTest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Stichoza\GoogleTranslate\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Stichoza\GoogleTranslate\GoogleTranslate;
+
+class TranslationTest extends TestCase
+{
+    public $tr;
+
+    public function setUp()
+    {
+        $this->tr = new GoogleTranslate();
+    }
+
+    public function testTranslationEquality()
+    {
+        try {
+            $resultOne = GoogleTranslate::trans('Hello', 'ka', 'en');
+        } catch (\ErrorException $e) {
+            $resultOne = null;
+        }
+        $resultTwo = $this->tr->setSource('en')->setTarget('ka')->translate('Hello');
+
+        $this->assertEquals($resultOne, $resultTwo, 'გამარჯობა');
+    }
+
+    public function testUTF16Translation()
+    {
+        try {
+            $resultOne = GoogleTranslate::trans('yes 👍🏽', 'de', 'en');
+        } catch (\ErrorException $e) {
+            $resultOne = null;
+        }
+        $resultTwo = $this->tr->setSource('en')->setTarget('de')->translate('yes 👍🏽');
+
+        $this->assertEquals($resultOne, $resultTwo, 'ja 👍🏽');
+    }
+
+    public function testRawResponse()
+    {
+        $rawResult = $this->tr->getResponse('cat');
+
+        $this->assertTrue(is_array($rawResult), 'Method getResponse() should return an array.');
+    }
+}