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>

static/js/nav.js

@@ -29,7 +29,9 @@
     }
 
     function isMobileNav() {
-        return window.matchMedia('(max-width: 767px)').matches;
+        if (window.qihuoLayout && window.qihuoLayout.isPhone()) return true;
+        return document.documentElement.dataset.mobile === '1'
+            || window.matchMedia('(max-width: 767px)').matches;
     }
 
     toggle.addEventListener('click', function () {
@@ -70,6 +72,14 @@
         if (!isMobileNav()) closeNav();
     });
 
+    if (window.qihuoLayout) {
+        window.addEventListener('orientationchange', function () {
+            setTimeout(function () {
+                if (!isMobileNav()) closeNav();
+            }, 150);
+        });
+    }
+
     document.addEventListener('keydown', function (e) {
         if (e.key === 'Escape') closeNav();
     });