Add responsive mobile layout, records cards, and tablet settings fold fix.

Mobile gets compact trade/records UI with detail modals; static assets are cache-busted and settings cards fold correctly on tablet grid layout.

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

templates/trade.html

@@ -2,7 +2,7 @@
 {% extends "base.html" %}
 {% block title %}下单监控 - 国内期货 · 交易复盘系统{% endblock %}
 {% block extra_css %}
-<link rel="stylesheet" href="{{ url_for('static', filename='css/trade.css') }}">
+<link rel="stylesheet" href="{{ url_for('static', filename='css/trade.css') }}?v={{ asset_v }}">
 {% endblock %}
 {% block content %}
 <div class="trade-page">