redesign loading screen

src/shared/notes/file.tsx

@@ -32,7 +32,7 @@ export function FileNote({ event }: { event: NDKEvent }) {
     switch (type) {
       case 'image':
         return (
-          <div key={url} className="group">
+          <div key={url} className="group relative">
             <img
               src={url}
               alt={url}

src/shared/notes/kinds/file.tsx

@@ -28,7 +28,7 @@ export function FileKind({ tags }: { tags: NDKTag[] }) {
 
   if (type === 'image') {
     return (
-      <div key={url} className="group">
+      <div key={url} className="group relative">
         <img
           src={url}
           alt={url}