1、新增傅里叶策略

2、新增策略管理、策略重启功能

futures_trading_strategies/test/TestConnectionStrategy.py

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+import numpy as np
+from scipy.signal import stft
+from datetime import datetime, timedelta
+from typing import Optional, Any, List, Dict
+
+from src.core_data import Bar, Order
+from src.indicators.base_indicators import Indicator
+from src.indicators.indicators import Empty, NormalizedATR, AtrVolatility
+from src.strategies.base_strategy import Strategy
+
+
+# =============================================================================
+#  策略实现 (SpectralTrendStrategy)
+# =============================================================================
+
+class TestConnectionStrategy(Strategy):
+    """
+    频域能量相变策略 - 捕获肥尾趋势
+
+    核心哲学:
+    1. 显式傅里叶变换: 直接分离低频(趋势)、高频(噪音)能量
+    2. 相变临界点: 仅当低频能量占比 > 阈值时入场
+    3. 低频交易: 每月仅2-5次信号，持仓数日捕获肥尾
+    4. 完全参数化: 无硬编码，适配任何市场时间结构
+
+    参数说明:
+    - bars_per_day: 市场每日K线数量 (e.g., 23 for 15min US markets)
+    - low_freq_days: 低频定义下限 (天), 默认2.0
+    - high_freq_days: 高频定义上限 (天), 默认1.0
+    """
+
+    def __init__(
+            self,
+            context: Any,
+            main_symbol: str,
+            enable_log: bool,
+    ):
+        super().__init__(context, main_symbol, enable_log)
+        # --- 内部状态变量 ---
+        self.main_symbol = main_symbol
+
+
+    def on_open_bar(self, open_price: float, symbol: str):
+        self.log(f'on open bar: {symbol}')
+
+    def on_init(self):
+        super().on_init()
+
+
+    def on_rollover(self, old_symbol: str, new_symbol: str):
+        super().on_rollover(old_symbol, new_symbol)