品种增加每点价值字段，PNL计算支持不同品种差异化配置

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ft-app/app/templates/admin.html

@@ -105,6 +105,10 @@
           {% endfor %}
         </select>
       </div>
+      <div class="form-group" style="margin-bottom:0;flex:0 0 auto;min-width:80px;">
+        <label>每点价值</label>
+        <input type="number" name="point_value" value="20" min="1" required style="font-size:0.9rem;">
+      </div>
       <button type="submit" class="btn btn-primary">新建</button>
     </form>
   </div>
@@ -112,12 +116,13 @@
   {% if products %}
   <div class="table-wrap">
   <table>
-    <tr><th>代码</th><th>名称</th><th>交易所</th><th>合约数</th><th>操作</th></tr>
+    <tr><th>代码</th><th>名称</th><th>交易所</th><th>每点</th><th>合约数</th><th>操作</th></tr>
     {% for p in products %}
     <tr>
       <td><strong>{{ p.code }}</strong></td>
       <td>{{ p.name }}</td>
       <td>{{ p.exchange }}</td>
+      <td>{{ p.point_value }}</td>
       <td>{{ p.contracts|length }}</td>
       <td>
         <form method="post" action="/admin/product/{{ p.id }}/delete" onsubmit="return confirm('删除品种 {{ p.code }} 及其所有合约？')" style="display:inline;">