Add hub usage help page with settings nav toggle.

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

manual_trading_hub/static/index.html

@@ -52,6 +52,7 @@
           <a href="/plan" id="nav-plan">开仓计划</a>
           <a href="/monitor" id="nav-monitor">监控区</a>
           <a href="/strategy" id="nav-strategy">策略说明</a>
+          <a href="/help" id="nav-help">使用说明</a>
           <a href="/market" id="nav-market">行情区</a>
           <a href="/calculator" id="nav-calculator">计算器</a>
           <a href="/archive" id="nav-archive">内照明心</a>
@@ -890,6 +891,28 @@
       </div>
     </div>
 
+    <div id="page-help" class="page hidden">
+      <div class="page-head">
+        <div>
+          <h1><span class="head-tag">HLP</span> 使用说明</h1>
+          <p class="page-desc">中控与实例 · 日常操作指南（不含部署说明）</p>
+        </div>
+      </div>
+      <div class="help-toolbar">
+        <span id="help-load-status" class="toolbar-meta"></span>
+      </div>
+      <div class="help-layout">
+        <aside class="card help-toc-card">
+          <h3 class="help-toc-title">目录</h3>
+          <nav id="help-toc-nav" class="help-toc-nav" aria-label="使用说明目录"></nav>
+        </aside>
+        <section class="card help-doc-card">
+          <div id="help-doc-body" class="strategy-doc-body prose"></div>
+          <p id="help-doc-source" class="strategy-doc-source"></p>
+        </section>
+      </div>
+    </div>
+
     <div id="page-logs" class="page hidden">
       <div class="page-head hub-logs-page-head">
         <div>
@@ -1010,6 +1033,10 @@
               <input type="checkbox" id="pref-show-nav-strategy" checked />
               顶栏显示「策略说明」
             </label>
+            <label class="chk-label settings-display-chk">
+              <input type="checkbox" id="pref-show-nav-help" checked />
+              顶栏显示「使用说明」
+            </label>
             <label class="chk-label settings-display-chk">
               <input type="checkbox" id="pref-show-nav-logs" checked />
               顶栏显示「系统日志」
@@ -1233,6 +1260,7 @@
   <script src="/assets/funds.js?v=20260707-hub-options-funds"></script>
   <script src="/assets/dashboard.js?v=20260708-options-expiry-cd"></script>
   <script src="/assets/strategy.js?v=3"></script>
+  <script src="/assets/help.js?v=1"></script>
   <script src="/assets/logs.js?v=1"></script>
   <script src="/assets/ai_review_render.js?v=3"></script>
   <script src="/assets/time_close_ui.js?v=3"></script>