feat: AI 即时分析计费/共识/校准与 Docker 前端构建

- 即时分析：先扣费、防重入(429)、失败退款；记忆库与离线校准 worker
- 多周期共识、客观分与设置项 AI_ANALYSIS_CONSENSUS_TIMEFRAMES
- Docker：前端多阶段构建(QuantDinger-Vue-src)、根目录 .dockerignore、compose 调整
- 同步 frontend/dist 静态资源

Made-with: Cursor

backend_api_python/app/__init__.py

@@ -273,6 +273,12 @@ def create_app(config_name='default'):
         start_portfolio_monitor()
         start_usdt_order_worker()
         start_polymarket_worker()
+        # Offline calibration to make AI thresholds self-tuning.
+        try:
+            from app.services.ai_calibration import start_ai_calibration_worker
+            start_ai_calibration_worker()
+        except Exception:
+            pass
         restore_running_strategies()
     
     return app