Adds FileHeader loading to a thread.

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -781,25 +781,29 @@ fun BadgeDisplay(baseNote: Note) {
 @Composable
 fun FileHeaderDisplay(note: Note) {
     val event = (note.event as? FileHeaderEvent) ?: return
-
     val fullUrl = event.url() ?: return
-    val blurHash = event.blurhash()
-    val hash = event.hash()
-    val description = event.content
-    val removedParamsFromUrl = fullUrl.split("?")[0].lowercase()
-    val isImage = imageExtensions.any { removedParamsFromUrl.endsWith(it) }
-    val isVideo = videoExtensions.any { removedParamsFromUrl.endsWith(it) }
 
-    if (isImage || isVideo) {
+    var content by remember { mutableStateOf<ZoomableContent?>(null) }
-        val content = if (isImage) {
+
-            ZoomableImage(fullUrl, description, hash, blurHash)
+    LaunchedEffect(key1 = event.id) {
-        } else {
+        withContext(Dispatchers.IO) {
-            ZoomableVideo(fullUrl, description, hash)
+            val blurHash = event.blurhash()
+            val hash = event.hash()
+            val description = event.content
+            val removedParamsFromUrl = fullUrl.split("?")[0].lowercase()
+            val isImage = imageExtensions.any { removedParamsFromUrl.endsWith(it) }
+            val isVideo = videoExtensions.any { removedParamsFromUrl.endsWith(it) }
+            content = if (isImage) {
+                ZoomableImage(fullUrl, description, hash, blurHash)
+            } else {
+                ZoomableVideo(fullUrl, description, hash)
+            }
         }
-        ZoomableContentView(content = content, listOf(content))
-    } else {
-        UrlPreview(fullUrl, "$fullUrl ")
     }
+
+    content?.let {
+        ZoomableContentView(content = it, listOf(it))
+    } ?: UrlPreview(fullUrl, "$fullUrl ")
 }
 
 @Composable