Add key-level auto trade, AI analysis, and trading UX improvements.

Key monitors use 5m close triggers with WeChat alerts and box/convergence auto orders; add pending-order worker, structured WeChat notify, AI settings/messages, session clock, CTP margin sizing, and dual-layer position limits.

Co-authored-by: Cursor <cursoragent@cursor.com>

trading_context.py

@@ -51,6 +51,14 @@ def get_max_margin_pct(get_setting: Callable[[str, str], str]) -> float:
         return 30.0
 
 
+def get_roll_max_margin_pct(get_setting: Callable[[str, str], str]) -> float:
+    """滚仓后总保证金占权益上限（%），默认 50。"""
+    try:
+        return max(1.0, min(100.0, float(get_setting("roll_max_margin_pct", "50") or 50)))
+    except (TypeError, ValueError):
+        return 50.0
+
+
 def get_trailing_be_tick_buffer(get_setting: Callable[[str, str], str]) -> int:
     """移动保本：止损移至开仓价 ± N 个最小变动价位（默认 2）。"""
     try: