fix: 融资启用时禁用预留现金控件

margin=yes 时 reserve 下拉框和输入框全部 disabled + muted
margin=no 时 reserve 控件正常可操作
margin 选项不被禁用（用户可选 margin 自动清除 reserve）

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Pigbibi

web/strategy-switch-console/index.html

@@ -4194,8 +4194,9 @@ <h2 data-i18n="summary">切换摘要</h2>
           "{currency}",
           selectedCashCurrency(platform, account),
         );
-        minReservedCashInput.disabled = reserveMode === "current" || reserveMode === "none" || reserveMode === "ratio";
-        reservedCashRatioInput.disabled = reserveMode === "current" || reserveMode === "none" || reserveMode === "floor";
+        reservePolicyModeSelect.disabled = marginBlocksReserve;
+        minReservedCashInput.disabled = marginBlocksReserve || reserveMode === "current" || reserveMode === "none" || reserveMode === "ratio";
+        reservedCashRatioInput.disabled = marginBlocksReserve || reserveMode === "current" || reserveMode === "none" || reserveMode === "floor";
         minReservedCashInput.value = reserveMode === "ratio" || reserveMode === "none" ? "" : form.minReservedCashUsd;
         reservedCashRatioInput.value = reserveMode === "floor" || reserveMode === "none" ? "" : form.reservedCashRatio;
         el("reserve-policy-block").classList.toggle("policy-block-muted", marginBlocksReserve);