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/.bower.json

@@ -0,0 +1,43 @@
+{
+  "name": "eonasdan-bootstrap-datetimepicker",
+  "version": "4.17.47",
+  "main": [
+    "build/css/bootstrap-datetimepicker.min.css",
+    "build/js/bootstrap-datetimepicker.min.js"
+  ],
+  "dependencies": {
+    "jquery": ">=1.8.3",
+    "moment": ">=2.10.5"
+  },
+  "homepage": "https://github.com/Eonasdan/bootstrap-datetimepicker",
+  "authors": [
+    "Eonasdan"
+  ],
+  "description": "bootstrap3 datetimepicker",
+  "keywords": [
+    "twitter-bootstrap",
+    "bootstrap",
+    "datepicker",
+    "datetimepicker",
+    "timepicker",
+    "moment"
+  ],
+  "license": "MIT",
+  "private": false,
+  "ignore": [
+    "**/.*",
+    "node_modules",
+    "bower_components",
+    "test",
+    "tests"
+  ],
+  "_release": "4.17.47",
+  "_resolution": {
+    "type": "version",
+    "tag": "4.17.47",
+    "commit": "25c11d79e614bc6463a87c3dd9cbf8280422e006"
+  },
+  "_source": "https://github.com/Eonasdan/bootstrap-datetimepicker.git",
+  "_target": "~4.17.43",
+  "_originalSource": "eonasdan-bootstrap-datetimepicker"
+}