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/nice-validator/.bower.json

@@ -0,0 +1,51 @@
+{
+  "name": "nice-validator",
+  "description": "Simple, smart and pleasant verification solution.",
+  "moduleType": [
+    "amd",
+    "node",
+    "globals"
+  ],
+  "keywords": [
+    "jquery",
+    "validation",
+    "form",
+    "validator",
+    "validate",
+    "nice-validator",
+    "jquery-plugin"
+  ],
+  "authors": [
+    "Jony Zhang <niceue@live.com>"
+  ],
+  "license": "MIT",
+  "homepage": "https://github.com/niceue/nice-validator",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/niceue/nice-validator.git"
+  },
+  "main": "dist/jquery.validator.js",
+  "dependencies": {
+    "jquery": ">=1.7"
+  },
+  "ignore": [
+    ".*",
+    "src",
+    "test",
+    "gulpfile.js",
+    "*.json",
+    "*.md",
+    "*.yml",
+    "!README.md"
+  ],
+  "version": "1.1.5",
+  "_release": "1.1.5",
+  "_resolution": {
+    "type": "version",
+    "tag": "1.1.5",
+    "commit": "76d0e5d7b098ce7cf0f4fd6bd8662cba8a366497"
+  },
+  "_source": "https://github.com/niceue/validator.git",
+  "_target": "~1.1.1",
+  "_originalSource": "nice-validator"
+}