Fix roll first-lots display and make market add use pending orders.

Store initial_lots on roll groups, submit market roll as CTP pending legs with cancel closing empty groups, and backfill first-lots for existing active groups.

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

modules/web/static/js/strategy.js

@@ -119,7 +119,7 @@
         }
         if (execHint) execHint.hidden = false;
         if (btnExec) {
-            btnExec.textContent = mode === 'market' ? '执行滚仓' : '提交监控';
+            btnExec.textContent = mode === 'market' ? '提交委托' : '提交监控';
         }
         if (btnPreview) {
             btnPreview.disabled = false;
@@ -257,21 +257,22 @@
         btnRollE.addEventListener('click', function () {
             var payload = rollPayload || formData(rollForm);
             var mode = (payload.add_mode || 'market');
-            if (mode === 'market') {
-                if (!inTradingSession) {
-                    alert('休盘期间请切换为「突破加仓」后提交监控');
-                    return;
-                }
-                if (!confirm('确认执行市价滚仓？')) return;
-                startRollCountdown(btnRollE, payload);
+            if (mode === 'market' && !inTradingSession) {
+                alert('休盘期间请切换为「突破加仓」后提交监控');
                 return;
             }
+            var confirmMsg = mode === 'market'
+                ? '确认提交市价加仓委托？可在「正在滚仓」中撤单。'
+                : '确认提交突破加仓监控？';
+            if (!confirm(confirmMsg)) return;
             btnRollE.disabled = true;
             btnRollE.textContent = '提交中…';
             jsonPost('/api/strategy/roll/execute', payload).then(function (d) {
                 if (!d.ok) { alert(d.error || '失败'); return; }
-                alert(d.message || '已提交监控');
+                alert(d.message || (mode === 'market' ? '委托已提交' : '已提交监控'));
                 location.reload();
+            }).catch(function () {
+                alert('提交失败，请稍后重试');
             }).finally(function () {
                 btnRollE.disabled = false;
                 syncRollModeUi();