Fix btc_eth live card option premium USDT conversion.

Use option (BTC) index for coin-to-U; never fall back to ETH perp mark. Also add no-server-ops Cursor rule.

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

lib/hedge_plan/hedge_plan_orders_lib.py

@@ -1775,14 +1775,31 @@ def execute_manual_close_plan(cfg: dict[str, Any], conn: Any, plan_id: int) -> d
         notes.append("卖币失败: " + str(sell_r.get("msg") or ""))
 
     total = float(opt_pnl) + float(perp_pnl)
-    # 期权币本位盈亏换算到 U(粗):用指数
+    # 期权币本位盈亏换算到 U:用期权标的指数(跨币=BTC,禁止×ETH)
     try:
-        fetch_idx = cfg.get("fetch_index_price")
-        idx = float(fetch_idx(uly) or 0) if callable(fetch_idx) else 0.0
+        from lib.hedge_plan.hedge_plan_live_positions_lib import resolve_option_index_px
+        from lib.hedge_plan.hedge_po_mode_lib import get_hedge_po_mode, is_cross_asset, option_underlying
+
+        mode = str(plan.get("po_mode") or get_hedge_po_mode())
+        opt_u = str(plan.get("option_underlying") or plan.get("underlying") or option_underlying(mode) or uly).upper()
+        ex_idx = cfg.get("exchange_options") or cfg.get("exchange")
+        if callable(ex_idx):
+            try:
+                ex_idx = ex_idx()
+            except Exception:
+                ex_idx = None
+        idx = float(
+            resolve_option_index_px(
+                cfg,
+                opt_u,
+                ex_opt=ex_idx,
+                cross_asset=is_cross_asset(mode),
+                perp_fallback=None,
+            )
+            or 0
+        )
         # opt_pnl 可能已是币;若为币且绝对值很小则 × 指数
-        # resolve_option_leg_realized_pnl 对币本位通常返回币;统一展示用 preview 风格
         if abs(opt_pnl) < 10 and idx > 0 and abs(opt_pnl * idx) > abs(opt_pnl):
-            # 更可能是币单位
             opt_pnl_u = opt_pnl * idx
         else:
             opt_pnl_u = opt_pnl