Fix options chain headers mixing list and T-view columns.

Thead rows used a .hidden class with no CSS rule on instance pages, so both header sets stayed visible.

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

lib/options/templates/options_panel.html

@@ -42,12 +42,12 @@
                             <th>距平衡</th>
                             <th>操作</th>
                         </tr>
-                        <tr id="opt-strike-head-t" class="hidden">
+                        <tr id="opt-strike-head-t" class="hidden" hidden>
                             <th colspan="3" class="opt-t-head-call">Call</th>
                             <th colspan="3" class="opt-t-head-mid">跨式</th>
                             <th colspan="3" class="opt-t-head-put">Put</th>
                         </tr>
-                        <tr id="opt-strike-head-t-cols" class="hidden">
+                        <tr id="opt-strike-head-t-cols" class="hidden" hidden>
                             <th>卖一/张</th>
                             <th>类型</th>
                             <th>操作</th>
@@ -273,4 +273,4 @@
     </div>
 </div>
 <script src="/static/options_expiry_countdown.js?v=1"></script>
-<script src="/static/options_panel.js?v=33"></script>
+<script src="/static/options_panel.js?v=34"></script>