Auto-size hub order popup iframe so trade form shows without scrollbars.

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

embed_templates/embed_page_fragment.html

@@ -24,6 +24,7 @@
         {% elif page == 'trade' %}
         <div class="dual-panel-grid{% if order_popup %} order-popup-trade-grid{% endif %}" style="grid-column:1/-1">
         <div class="card order-popup-form-card">
+            {% if not order_popup %}
             <div style="display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-bottom:8px">
                 <h2 style="margin-bottom:0">实盘下单监控</h2>
                 {% if focus_order_id %}
@@ -32,6 +33,7 @@
                 <span class="btn-del" style="background:#2f2f44;color:#9aa;cursor:not-allowed">暂无持仓可放大</span>
                 {% endif %}
             </div>
+            {% endif %}
             {% include order_rule_tips_tpl %}
             <form id="add-order-form" action="/add_order" method="post" class="form-row" data-risk-percent="{{ risk_percent }}">
                 <input id="order-symbol" name="symbol" placeholder="BTC 或 BTC/USDT" required>