币本位 env 隐藏门控 USDC 倍数项，USDC 模式隐藏币本位倍数

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

lib/common/static/instance_settings_prefs.js

@@ -351,6 +351,7 @@
     body.dataset.envModeSectionIdx = String(modeSectionIdx);
     bindTradeModeAutoRefresh(body);
     bindCompoundBudgetVisibility(body);
+    bindMarginModeGateVisibility(body);
     return body;
   }
 
@@ -362,6 +363,12 @@
     return input ? input.closest(".env-field-row") : null;
   }
 
+  function setEnvRowHidden(row, hidden) {
+    if (!row) return;
+    row.hidden = !!hidden;
+    row.style.display = hidden ? "none" : "";
+  }
+
   function syncCompoundBudgetVisibility(body) {
     if (!body) return;
     const compoundSel = body.querySelector(
@@ -370,8 +377,18 @@
     const budgetRow = envFieldRowByKey(body, "OKX_OPTIONS_TRADE_BUDGET_USDC");
     if (!budgetRow) return;
     const compoundOn = !compoundSel || String(compoundSel.value || "").toLowerCase() === "true";
-    budgetRow.hidden = compoundOn;
-    budgetRow.style.display = compoundOn ? "none" : "";
+    setEnvRowHidden(budgetRow, compoundOn);
+  }
+
+  function syncMarginModeGateVisibility(body) {
+    if (!body) return;
+    const modeSel = body.querySelector(
+      '.env-field-input[data-env-key="OKX_OPTIONS_MARGIN_MODE"]'
+    );
+    const mode = String((modeSel && modeSel.value) || "coin").toLowerCase();
+    const coinMode = mode !== "usdc";
+    setEnvRowHidden(envFieldRowByKey(body, "OKX_OPTIONS_CLOSE_RECYCLE_MULT_USDC"), coinMode);
+    setEnvRowHidden(envFieldRowByKey(body, "OKX_OPTIONS_CLOSE_RECYCLE_MULT_COIN"), !coinMode);
   }
 
   function bindCompoundBudgetVisibility(body) {
@@ -385,6 +402,17 @@
     compoundSel.addEventListener("change", () => syncCompoundBudgetVisibility(body));
   }
 
+  function bindMarginModeGateVisibility(body) {
+    if (!body) return;
+    syncMarginModeGateVisibility(body);
+    const modeSel = body.querySelector(
+      '.env-field-input[data-env-key="OKX_OPTIONS_MARGIN_MODE"]'
+    );
+    if (!modeSel || modeSel.dataset.marginGateBound === "1") return;
+    modeSel.dataset.marginGateBound = "1";
+    modeSel.addEventListener("change", () => syncMarginModeGateVisibility(body));
+  }
+
   function bindTradeModeAutoRefresh(body) {
     const modeSel = body.querySelector('.env-field-input[data-env-key="OKX_TRADE_MODE"]');
     if (!modeSel || modeSel.dataset.modeRefreshBound === "1") return;