Fix btc_eth watching entry, preview sizing, and coin-to-U settlement.

Use dual indices for watch/preview; perp entry uses ETH mark; expiry/close convert coin PnL via option index; align legacy long→Call; omit combo U when index missing.

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

lib/hedge_plan/hedge_plan_live_positions_lib.py

@@ -313,9 +313,8 @@ def build_live_hedge_cards(cfg: dict[str, Any], conn: Any) -> list[dict[str, Any
             round(opt_net_coin * float(idx), 4) if idx is not None and idx > 0 else None
         )
         perp_net = float(net.get("perp_net") or 0)
+        # 指数缺失时禁止用永续 U 冒充组合净利(尤其跨币会丢掉期权腿)
         combo_usdt = combo_net_usdt(net, option_index=float(idx or 0))
-        if combo_usdt is None:
-            combo_usdt = round(perp_net, 4)
         prem_coin = float(net.get("premium") or (float(avg_open or 0) * float(sheets or 0) * float(ct or 0.01)))
         prem_usdt = round(prem_coin * float(idx), 2) if idx is not None and idx > 0 else None
 
@@ -393,7 +392,11 @@ def build_live_hedge_cards(cfg: dict[str, Any], conn: Any) -> list[dict[str, Any
                     "net_usdt": combo_usdt,
                     "opt_net_usdt": opt_net_usdt,
                     "perp_net_usdt": perp_net,
-                    "note": "扣开平双边手续费;永续按盘口均价估",
+                    "note": (
+                        "期权指数缺失,组合净利暂不可算"
+                        if combo_usdt is None
+                        else "扣开平双边手续费;永续按盘口均价估"
+                    ),
                 },
             }
         )