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/eonasdan-bootstrap-datetimepicker/docs/theme/manifest.json

@@ -0,0 +1,41 @@
+{
+	"name": "Eonasdan.com",
+	"icons": [
+		{
+			"src": "\/android-chrome-36x36.png",
+			"sizes": "36x36",
+			"type": "image\/png",
+			"density": "0.75"
+		},
+		{
+			"src": "\/android-chrome-48x48.png",
+			"sizes": "48x48",
+			"type": "image\/png",
+			"density": "1.0"
+		},
+		{
+			"src": "\/android-chrome-72x72.png",
+			"sizes": "72x72",
+			"type": "image\/png",
+			"density": "1.5"
+		},
+		{
+			"src": "\/android-chrome-96x96.png",
+			"sizes": "96x96",
+			"type": "image\/png",
+			"density": "2.0"
+		},
+		{
+			"src": "\/android-chrome-144x144.png",
+			"sizes": "144x144",
+			"type": "image\/png",
+			"density": "3.0"
+		},
+		{
+			"src": "\/android-chrome-192x192.png",
+			"sizes": "192x192",
+			"type": "image\/png",
+			"density": "4.0"
+		}
+	]
+}