remove: 全面移除「错过机会」功能与文案

删除手动记录表单与 /add_miss；停止自动生成错过类交易记录；列表/统计/顶栏不再展示；复盘卡片改为整行。

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

lib/instance/templates/embed_shell.html

@@ -83,7 +83,6 @@
     <div class="stat-box instance-desktop-only">
         <div class="stat-item"><div class="label">交易所</div><div class="value">{{ exchange_display }}</div></div>
         <div class="stat-item"><div class="label">总交易</div><div class="value" id="stat-total">{{ total }}</div></div>
-        <div class="stat-item"><div class="label">错过次数</div><div class="value" id="stat-miss">{{ miss_count }}</div></div>
         <div class="stat-item"><div class="label">胜率</div><div class="value" id="stat-rate">{{ rate }}%</div></div>
         <div class="stat-item"><div class="label">资金账户(USDT)</div><div class="value" id="total-capital">{% if funding_usdt is not none %}{{ funds_fmt(funding_usdt) }}U{% else %}—{% endif %}</div></div>
         <div class="stat-item"><div class="label">交易日</div><div class="value">{{ trading_day }}</div></div>