fix(frontend): restore banner carousel visible height

Global border-box collapsed the banner's height:0 + padding-bottom
aspect box to zero, so slides rendered but took no space. Prefer
aspect-ratio (with content-box fallback) and make .new-swiper honor
data-swiper-config so autoplay/loop/navigation from templates apply.

assets/css/frontend/header-components/base.css

@@ -175,9 +175,20 @@
     --scale-height: 40%;
     --pc-height: 100%;
     --m-height: 100%;
-    padding-bottom: var(--scale-height);
     width: 100%;
-    height: 0;
+    height: auto;
+    /* Prefer aspect-ratio so global border-box cannot collapse the box. */
+    aspect-ratio: 5 / 2;
+    padding-bottom: 0;
+}
+
+@supports not (aspect-ratio: 1 / 1) {
+    .scale-height {
+        height: 0;
+        padding-bottom: var(--scale-height);
+        box-sizing: content-box;
+        aspect-ratio: auto;
+    }
 }
 
 .scale-height .swiper-wrapper,