Review charts: M1/M5/M15/H1 bar counts 500/200/100/50; simplify markers.

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

app/templates/record_detail.html

@@ -63,12 +63,16 @@
 <div class="card" style="margin-top:14px">
   <h3>四周期 K 线（M1 / M5 / M15 / H1）</h3>
   <p class="muted">
-    客户端上报写入服务器；复盘读取。蓝=入场，黄=出场（价差很小时合并为一条「入/出」线）。图内只显示成交前后一段 K 线。
+    显示根数：M1 500 · M5 200 · M15 100 · H1 50（不足则有多少显多少）。
+    <span style="color:#4cc2ff">● 入场 {{ trade.open_price|fmt_price }}</span>
+    {% if trade.close_price is not none %}
+    · <span style="color:#f0b429">● 出场 {{ trade.close_price|fmt_price }}</span>
+    {% endif %}
   </p>
   <div class="chart-grid" style="margin-top:10px">
     {% for tf in ['M1','M5','M15','H1'] %}
     <div class="chart-box">
-      <h4>{{ tf }}</h4>
+      <h4>{{ tf }} <span class="chart-meta muted" style="font-weight:400"></span></h4>
       {% if charts[tf] %}
       <canvas class="chart-canvas" id="chart-{{ tf }}"
               data-tf="{{ tf }}"