Mark entry/exit on review charts; clarify bars are saved then read.

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

app/templates/record_detail.html

@@ -62,16 +62,24 @@
 
 <div class="card" style="margin-top:14px">
   <h3>四周期 K 线（M1 / M5 / M15 / H1）</h3>
-  <p class="muted">数据来自服务器缓存；由已激活客户端通过 API 上报 bars。无数据时显示占位。</p>
+  <p class="muted">
+    K 线由客户端上报后<strong>写入服务器 bars 表保存</strong>；打开复盘时按开/平仓时间窗口<strong>读取</strong>。
+    蓝线/点=入场，黄线/点=出场，紫虚线=入场→出场。
+  </p>
   <div class="chart-grid" style="margin-top:10px">
     {% for tf in ['M1','M5','M15','H1'] %}
     <div class="chart-box">
       <h4>{{ tf }} · {{ charts[tf]|length }} 根</h4>
       {% if charts[tf] %}
       <canvas class="chart-canvas" id="chart-{{ tf }}"
-              data-bars='{{ charts[tf]|tojson }}'></canvas>
+              data-bars='{{ charts[tf]|tojson }}'
+              data-open-ts="{{ trade.open_time or '' }}"
+              data-close-ts="{{ trade.close_time or '' }}"
+              data-open-price="{{ trade.open_price if trade.open_price is not none else '' }}"
+              data-close-price="{{ trade.close_price if trade.close_price is not none else '' }}"
+              data-side="{{ trade.side or '' }}"></canvas>
       {% else %}
-      <div class="empty-chart">暂无 {{ tf }} K 线缓存</div>
+      <div class="empty-chart">暂无 {{ tf }} K 线（需客户端上报后才有缓存）</div>
       {% endif %}
     </div>
     {% endfor %}