单独期权增加全仓复利模式：可选上限开关，仅允许一仓

用期权户全部可用×缓冲开仓，默认不设上限；开启上限后按 env 封顶，全仓时禁止已有持仓再开。

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

lib/options/options_position_limit_lib.py

@@ -119,3 +119,26 @@ def option_position_limit_block_msg(
             f"请将 OKX_OPTIONS_MAX_ACTIVE_POSITIONS 设为 0(不限制)或不小于 {active + need},或先平仓"
         )
     return f"期权持仓已达上限({active}/{mx}),请先平仓后再开"
+
+
+def compound_full_single_position_block_msg(
+    ex: Any,
+    *,
+    fetch_positions=None,
+) -> Optional[str]:
+    """全仓复利:账户内已有任意期权持仓则禁止再开(仅允许 1 笔)."""
+    fetch = fetch_positions
+    if fetch is None:
+        from lib.exchange.okx_options_lib import fetch_option_positions
+
+        fetch = fetch_option_positions
+    try:
+        rows = fetch(ex)
+    except Exception:
+        rows = None
+    if rows is None:
+        return "无法获取期权持仓,全仓复利模式暂不可开仓"
+    active = count_live_option_positions(rows)
+    if active >= 1:
+        return f"全仓复利模式仅允许同时持有 1 笔仓位(当前 {active} 笔),请先平仓"
+    return None