refactor(framework): 框架只保留抽象接口，具体实现移至strategies/shared

- FactorBase/FactorRegistry/FactorCombiner: 因子抽象接口
- SignalGenerator: 信号生成抽象接口
- RiskControl/Position/CallbackHook: 风控抽象接口
- StrategyBase: 策略抽象基类
- Executor/Portfolio: 执行器抽象接口
- ConfigLoader: 配置加载器
- 删除framework/factors/momentum.py（具体实现）

framework/__init__.py

@@ -1,21 +1,52 @@
 """
-量化策略通用框架
+框架统一入口（通用）
 
-融合Freqtrade回调机制 + 模块化因子设计
+只导出抽象接口，具体实现在strategies/shared/
 """
 
-from .factors import FactorBase, FactorRegistry, FactorCombiner
-from .signals import SignalGenerator, TopNSelector, TrendFollower, ReversalTrader
-from .strategy import StrategyBase, RotationStrategy
-from .risk import RiskControl, StopLossControl, PositionLimitControl
-from .execution import Executor, BacktestExecutor, DryRunExecutor
-from .config import ConfigLoader
+# 因子层抽象
+from framework.factors import FactorBase, FactorRegistry, FactorCombiner
+
+# 信号层抽象
+from framework.signals import SignalGenerator
+
+# 风控层抽象
+from framework.risk import Position, RiskControl, CallbackHook
+
+# 策略层抽象
+from framework.strategy import StrategyBase
+
+# 执行层抽象
+from framework.execution import Portfolio, Executor, BacktestExecutor, DryRunExecutor
+
+# 配置层
+from framework.config import ConfigLoader, StrategyConfig
+
 
 __all__ = [
-    'FactorBase', 'FactorRegistry', 'FactorCombiner',
-    'SignalGenerator', 'TopNSelector', 'TrendFollower', 'ReversalTrader',
-    'StrategyBase', 'RotationStrategy',
-    'RiskControl', 'StopLossControl', 'PositionLimitControl',
-    'Executor', 'BacktestExecutor', 'DryRunExecutor',
+    # 因子层
+    'FactorBase',
+    'FactorRegistry',
+    'FactorCombiner',
+    
+    # 信号层
+    'SignalGenerator',
+    
+    # 风控层
+    'Position',
+    'RiskControl',
+    'CallbackHook',
+    
+    # 策略层
+    'StrategyBase',
+    
+    # 执行层
+    'Portfolio',
+    'Executor',
+    'BacktestExecutor',
+    'DryRunExecutor',
+    
+    # 配置层
     'ConfigLoader',
+    'StrategyConfig',
 ]