数据同步品种卡片默认折叠，点标题展开

ft-app/app/templates/admin.html

@@ -29,7 +29,6 @@
 
 {# ═══════════════════ Tab: 数据同步 ═══════════════════ #}
 <div class="tab-panel{% if tab == 'sync' %} active{% endif %}" id="tab-sync">
-  {# ── Global sync ── #}
   <div style="display:flex;align-items:center;gap:12px;margin-bottom:20px;padding:14px 18px;background:var(--surface);border:1px solid var(--border);border-radius:10px;">
     <span style="font-size:0.85rem;color:var(--sub);">全部合约</span>
     <form method="post" action="/admin/sync" style="display:inline;">
@@ -38,19 +37,16 @@
     {% if request.query_params.get('synced') %}
     <span style="font-size:0.82rem;color:var(--success-fg);">✓ 已同步 {{ request.query_params.synced }} 条</span>
     {% endif %}
-    <span style="font-size:0.78rem;color:var(--sub);margin-left:auto;">
-      {{ total_contracts }} 个合约
-    </span>
+    <span style="font-size:0.78rem;color:var(--sub);margin-left:auto;">{{ total_contracts }} 个合约</span>
   </div>
 
   {% if products %}
   {% for p in products %}
-  {# ── Product card ── #}
   <div style="margin-bottom:16px;border:1px solid var(--border);border-radius:10px;overflow:hidden;">
     <div class="product-header"
          style="display:flex;align-items:center;gap:12px;padding:12px 18px;background:var(--th-bg);cursor:pointer;user-select:none;"
          onclick="toggleProduct(this)">
-      <span class="collapse-arrow" style="font-size:0.75rem;transition:transform .2s;display:inline-block;">▼</span>
+      <span class="collapse-arrow" style="font-size:0.75rem;transition:transform .2s;display:inline-block;transform:rotate(-90deg);">▼</span>
       <strong style="font-size:0.92rem;">{{ p.code }} · {{ p.name }}</strong>
       <span style="font-size:0.78rem;color:var(--sub);">{{ p.exchange }}</span>
       <span style="font-size:0.78rem;color:var(--sub);margin-left:8px;">{{ p.contracts|length }} 合约</span>
@@ -58,7 +54,7 @@
         <button type="submit" class="btn" style="font-size:0.78rem;padding:4px 14px;background:var(--accent);color:#fff;border-radius:5px;">同步该品种</button>
       </form>
     </div>
-    <div class="product-body" style="display:block;">
+    <div class="product-body" style="display:none;">
       <table style="font-size:0.84rem;">
         <tr><th style="text-align:left;padding:8px 14px;">合约</th><th style="text-align:center;padding:8px 14px;">数据条数</th><th style="text-align:center;padding:8px 14px;">状态</th><th style="text-align:center;padding:8px 14px;">操作</th></tr>
         {% for c in p.contracts %}