feat: CTP 断线重连、下单卡片优化、手数自动计算

后台每 30s 检测并重连；以损定仓填止损后自动算手数；开仓/平仓按钮并排对齐。

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

ctp_reconnect.py

@@ -0,0 +1,40 @@
+"""CTP 断线自动重连（后台线程）。"""
+from __future__ import annotations
+
+import logging
+import os
+import threading
+import time
+from typing import Callable
+
+from vnpy_bridge import ctp_try_auto_reconnect
+
+logger = logging.getLogger(__name__)
+
+RECONNECT_INTERVAL_SEC = 30
+
+
+def _auto_reconnect_enabled() -> bool:
+    return (os.getenv("CTP_AUTO_RECONNECT", "true") or "true").strip().lower() in (
+        "1",
+        "true",
+        "yes",
+    )
+
+
+def start_ctp_reconnect_worker(*, get_mode_fn: Callable[[], str], interval: int = RECONNECT_INTERVAL_SEC) -> None:
+    """定时检测 CTP 连接，断线后自动重连。"""
+
+    def _loop() -> None:
+        time.sleep(5)
+        while True:
+            try:
+                if _auto_reconnect_enabled():
+                    mode = get_mode_fn()
+                    if ctp_try_auto_reconnect(mode):
+                        logger.debug("CTP 连接正常 [%s]", mode)
+            except Exception as exc:
+                logger.warning("CTP reconnect worker: %s", exc)
+            time.sleep(max(15, interval))
+
+    threading.Thread(target=_loop, daemon=True, name="ctp-reconnect-worker").start()