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

backend_api_python/app/routes/__init__.py

@@ -25,6 +25,7 @@ def register_routes(app: Flask):
     from app.routes.community import community_bp
     from app.routes.fast_analysis import fast_analysis_bp
     from app.routes.billing import billing_bp
+    from app.routes.quick_trade import quick_trade_bp
     
     app.register_blueprint(health_bp)
     app.register_blueprint(auth_bp, url_prefix='/api/auth')   # Auth routes
@@ -44,4 +45,5 @@ def register_routes(app: Flask):
     app.register_blueprint(global_market_bp, url_prefix='/api/global-market')
     app.register_blueprint(community_bp, url_prefix='/api/community')
     app.register_blueprint(fast_analysis_bp, url_prefix='/api/fast-analysis')
-    app.register_blueprint(billing_bp, url_prefix='/api/billing')
+    app.register_blueprint(billing_bp, url_prefix='/api/billing')
+    app.register_blueprint(quick_trade_bp, url_prefix='/api/quick-trade')