feat(ui): add shimmer component and integrate into torrent details

frontend/src/components/ui/mod.rs

@@ -17,6 +17,7 @@ pub mod separator;
 pub mod sheet;
 pub mod sidenav;
 pub mod skeleton;
+pub mod shimmer;
 pub mod svg_icon;
 pub mod switch;
 pub mod table;

frontend/src/components/ui/shimmer.rs

@@ -0,0 +1,13 @@
+use leptos::prelude::*;
+use tw_merge::tw_merge;
+
+#[component]
+pub fn Shimmer(
+    #[prop(optional, into)] class: String,
+) -> impl IntoView {
+    let merged_class = tw_merge!(
+        "relative overflow-hidden bg-muted before:absolute before:inset-0 before:-translate-x-full before:animate-[shimmer_2s_infinite] before:bg-gradient-to-r before:from-transparent before:via-white/20 before:to-transparent dark:before:via-white/5",
+        class
+    );
+    view! { <div class=merged_class /> }
+}