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/moment/.bower.json

@@ -0,0 +1,37 @@
+{
+  "name": "moment",
+  "license": "MIT",
+  "main": "moment.js",
+  "ignore": [
+    "**/.*",
+    "benchmarks",
+    "bower_components",
+    "meteor",
+    "node_modules",
+    "scripts",
+    "tasks",
+    "test",
+    "component.json",
+    "composer.json",
+    "CONTRIBUTING.md",
+    "ender.js",
+    "Gruntfile.js",
+    "Moment.js.nuspec",
+    "package.js",
+    "package.json",
+    "ISSUE_TEMPLATE.md",
+    "typing-tests",
+    "min/tests.js"
+  ],
+  "homepage": "https://github.com/moment/moment",
+  "version": "2.29.0",
+  "_release": "2.29.0",
+  "_resolution": {
+    "type": "version",
+    "tag": "2.29.0",
+    "commit": "8feded15bc58a5860a726b46d78d0a9d7daa7c6e"
+  },
+  "_source": "https://github.com/moment/moment.git",
+  "_target": "~2.29.0",
+  "_originalSource": "moment"
+}