chore: restyle loading component

src/components/loading.rs

@@ -3,7 +3,7 @@ use leptos::prelude::*;
 #[component]
 pub fn Loading() -> impl IntoView {
     view! {
-        <div>
+        <div class="size-20 mx-auto">
             <img src="/loading.gif" />
         </div>
     }