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>

vnpy_bridge.py

@@ -115,6 +115,8 @@ class CtpBridge:
         return self._connected_mode
 
     def status(self, mode: str) -> dict[str, Any]:
+        if self._connected_mode == mode:
+            self.ping()
         st = _setting_for_mode(mode)
         missing = [k for k in ("用户名", "密码", "交易服务器") if not st.get(k)]
         return {
@@ -132,7 +134,9 @@ class CtpBridge:
         if not self._engine:
             raise RuntimeError(self._last_error or "vnpy 引擎未初始化")
         if self._connected_mode == mode and not force:
-            return
+            if self.ping():
+                return
+            self._connected_mode = None
         setting = _setting_for_mode(mode)
         if not setting.get("用户名") or not setting.get("密码"):
             raise ValueError(
@@ -190,8 +194,24 @@ class CtpBridge:
             raise RuntimeError(hint)
 
     def ensure_connected(self, mode: str) -> None:
-        if self._connected_mode != mode:
-            self.connect(mode)
+        if self._connected_mode == mode and self.ping():
+            return
+        self.connect(mode)
+
+    def ping(self) -> bool:
+        """检测连接是否仍有效；无效则清除 connected 状态。"""
+        if not self._engine or not self._connected_mode:
+            return False
+        try:
+            if self._engine.get_all_accounts():
+                return True
+        except Exception as exc:
+            logger.debug("CTP ping failed: %s", exc)
+        self._connected_mode = None
+        return False
+
+    def mark_disconnected(self) -> None:
+        self._connected_mode = None
 
     def get_account(self) -> dict[str, Any]:
         if not self._engine:
@@ -310,6 +330,24 @@ def ctp_connect(mode: str, *, force: bool = False) -> dict[str, Any]:
     return b.status(mode)
 
 
+def ctp_try_auto_reconnect(mode: str) -> bool:
+    """断线时静默重连；已连接且 ping 正常则直接返回 True。"""
+    b = get_bridge()
+    if not b.available():
+        return False
+    st = _setting_for_mode(mode)
+    if not st.get("用户名") or not st.get("密码") or not st.get("交易服务器"):
+        return False
+    if b.connected_mode == mode and b.ping():
+        return True
+    try:
+        b.connect(mode, force=True)
+        return b.connected_mode == mode
+    except Exception as exc:
+        logger.info("CTP 自动重连失败: %s", exc)
+        return False
+
+
 def ctp_status(mode: str) -> dict[str, Any]:
     return get_bridge().status(mode)