Add live expiry countdown for options positions on instance page and trading hub.

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

lib/common/static/options_panel.js

@@ -431,6 +431,8 @@
     const upl = p.upl;
     const uplCls = upl > 0 ? "pos-pnl-profit" : upl < 0 ? "pos-pnl-loss" : "";
     const sideCls = (p.opt_type || "").toUpperCase() === "P" ? "pos-side-short" : "pos-side-long";
+    const expMs = p.exp_time_ms != null ? p.exp_time_ms : p.exp_time;
+    const expAttr = expMs != null && expMs !== "" ? String(expMs) : "";
     return (
       '<div class="pos-card opt-pos-card" data-inst="' + (p.inst_id || "") + '">' +
       '<div class="pos-card-head">' +
@@ -442,6 +444,9 @@
       '<div class="pos-meta">' +
       '<span class="pos-meta-item">行权价: ' + fmt(p.strike, 0) + "</span>" +
       '<span class="pos-meta-item">张数: ' + fmt(p.pos, 0) + " · 币量 " + fmt(p.eth_amount, 4) + "</span>" +
+      (expAttr
+        ? '<span class="pos-meta-item">到期倒计时: <span class="opt-expiry-cd" data-opt-exp-ms="' + expAttr + '">—</span></span>'
+        : "") +
       "</div>" +
       '<div class="pos-grid">' +
       '<div class="pos-cell"><span class="pos-label">权利金</span><span class="pos-value">' + fmt(p.premium_paid, 4) + " USDC</span></div>" +
@@ -509,6 +514,9 @@
         closePosition(btn.getAttribute("data-inst"), btn);
       });
     });
+    if (window.OptionsExpiryCountdown && OptionsExpiryCountdown.ensureTimer) {
+      OptionsExpiryCountdown.ensureTimer();
+    }
   }
 
   async function refreshStats() {