v2.2.1: frontend closed-source + Docker one-click deploy

- Remove frontend source code (now in private repo)
- Add pre-built frontend/dist/ with Nginx serving
- Simplify docker-compose.yml (no Node.js build needed)
- Update README with docs index and Docker deploy guide
- Add admin order list and AI analysis stats tabs
- Add quick trade API routes
- Clean up redundant files (package-lock.json, yarn.lock, .iml)
- Add GitHub Actions workflow for frontend update automation

quantdinger_vue/jsconfig.json

@@ -1,11 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es6",
-    "baseUrl": ".",
-    "paths": {
-      "@/*": ["src/*"]
-    }
-  },
-  "exclude": ["node_modules", "dist"],
-  "include": ["src/**/*"]
-}