Label night-session products and hide day-only symbols at night.

Mark tradable varieties with a night tag; during 21:00-02:30 filter out index futures and other products without night sessions from symbol picker and recommend list.

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

static/js/symbol.js

@@ -106,9 +106,12 @@
                 div.classList.add('near-expiry');
             }
             var label = item.display || (item.name + ' ' + item.ths_code);
-            if (item.near_expiry) {
+            if item.near_expiry) {
                 label += ' <span class="near-expiry-tag">临期</span>';
             }
+            if (item.has_night_session) {
+                label += ' <span class="night-session-tag">夜盘</span>';
+            }
             div.innerHTML = label +
                 '<div class="sub">' + formatSub(item) + '</div>';
             div.addEventListener('mousedown', function (e) {

static/js/trade.js

@@ -1405,16 +1405,17 @@
         var code = r.main_code || r.ths || '';
         var nameCls = r.trend_transition ? ' class="trend-name"' : '';
         var name = r.name || '';
+        var nightTag = r.has_night_session ? ' <span class="night-session-tag">夜盘</span>' : '';
         if (marketNavEnabled && r.main_code) {
             var href = '/market?symbol=' + encodeURIComponent(r.main_code) + '&period=d';
             return (
                 '<td><a href="' + href + '" class="rec-market-link" title="查看日线 K 线">' +
-                '<strong' + nameCls + '>' + name + '</strong> ' +
+                '<strong' + nameCls + '>' + name + nightTag + '</strong> ' +
                 '<span class="text-accent">' + r.main_code + '</span></a></td>'
             );
         }
         return (
-            '<td><strong' + nameCls + '>' + name + '</strong> ' +
+            '<td><strong' + nameCls + '>' + name + nightTag + '</strong> ' +
             '<span class="text-accent">' + code + '</span></td>'
         );
     }