fix(hub): simplify AI coach header actions

Hide model name labels and style New Chat as a primary button matching Generate Summary.

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

manual_trading_hub/static/index.html

@@ -214,7 +214,6 @@
           <div class="ai-panel-head">
             <h2>今日总结</h2>
             <div class="ai-panel-actions">
-              <span id="ai-summary-meta" class="toolbar-meta ai-meta-line"></span>
               <button type="button" id="btn-ai-summary" class="primary">生成今日总结</button>
             </div>
           </div>
@@ -227,8 +226,7 @@
           <div class="ai-panel-head">
             <h2 id="ai-chat-title">聊天</h2>
             <div class="ai-panel-actions">
-              <span id="ai-chat-meta" class="toolbar-meta ai-meta-line"></span>
-              <button type="button" id="btn-ai-chat-new" class="ghost">新开对话</button>
+              <button type="button" id="btn-ai-chat-new" class="primary">新开对话</button>
             </div>
           </div>
           <div id="ai-chat-messages" class="ai-panel-scroll ai-chat-messages" aria-live="polite"></div>
@@ -288,6 +286,6 @@
   <script src="https://unpkg.com/lightweight-charts@4.2.0/dist/lightweight-charts.standalone.production.js"></script>
   <script src="/assets/chart.js?v=20260604-upnl-contracts"></script>
   <script src="/assets/ai_review_render.js?v=2"></script>
-  <script src="/assets/app.js?v=20260606-hub-ai-sec"></script>
+  <script src="/assets/app.js?v=20260606-hub-ai-ui"></script>
 </body>
 </html>