修复币本位期权杠杆显示:按1/卖一而非指数/卖一

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

lib/common/static/options_panel.js

@@ -946,6 +946,11 @@
     return Number(v).toFixed(2);
   }
 
+  function isCoinMarginMode() {
+    const ch = state.chain || {};
+    return ch.margin_mode === "coin" || ch.options_margin_mode === "coin";
+  }
+
   function calcContractLeverage(indexPx, ethAmount, totalPremium) {
     if (indexPx == null || ethAmount == null || totalPremium == null) return null;
     const idx = Number(indexPx);
@@ -954,6 +959,10 @@
     if (!Number.isFinite(idx) || !Number.isFinite(amt) || !Number.isFinite(prem) || amt <= 0 || prem <= 0) {
       return null;
     }
+    // USDC: 名义(U)/权利金(U)=指数×币数/权利金; 币本位权利金为币: 名义(U)/(权利金币×指数)=币数/权利金币
+    if (isCoinMarginMode()) {
+      return Math.round((amt / prem) * 10) / 10;
+    }
     return Math.round((idx * amt) / prem * 10) / 10;
   }
 
@@ -962,12 +971,15 @@
     return "约 " + Number(v).toFixed(1) + "×";
   }
 
-  /** 链上展示:指数 ÷ 卖一(每1币). */
+  /** 链上展示:USDC=指数÷卖一(美元);币本位卖一为币报价 → 1÷卖一. */
   function calcAskLeverage(indexPx, askPx) {
     if (indexPx == null || askPx == null) return null;
     const idx = Number(indexPx);
     const ask = Number(askPx);
     if (!Number.isFinite(idx) || !Number.isFinite(ask) || ask <= 0) return null;
+    if (isCoinMarginMode()) {
+      return Math.round((1 / ask) * 10) / 10;
+    }
     return Math.round((idx / ask) * 10) / 10;
   }