better artist banner heights

frontend/src/pages/artist.rs

@@ -253,10 +253,8 @@ pub fn artist_page(props: &Props) -> Html {
 
     html! {
         <div>
-            if let Some(ref banner) = d.artist_banner {
-                <div class="artist-banner" style={format!("background-image: url('{banner}')")}>
-                </div>
-            }
+            <div class={if d.artist_banner.is_some() { "artist-banner-wrap" } else { "" }}
+                style={d.artist_banner.as_ref().map(|b| format!("background-image: url('{b}')")).unwrap_or_default()}>
             <div class="page-header">
                 <div class="flex items-center justify-between">
                     <div class="flex gap-2 items-center">
@@ -329,6 +327,7 @@ pub fn artist_page(props: &Props) -> Html {
                     <p class="text-sm text-muted loading">{ "Loading track counts..." }</p>
                 }
             </div>
+            </div> // close artist-banner-wrap
 
             if let Some(ref msg) = *message {
                 <div class="card" style="border-color: var(--success);">