fix: hide compression slider for audio uploads

Audio has no compression support in MediaCompressor (falls through to
no-op), so showing the compression quality slider for audio files is
misleading. This removes audio from the slider visibility condition in
ImageVideoDescription and wraps the unconditionally-shown slider in
ChatFileUploadDialog with a media type check.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/creators/uploads/ImageVideoDescription.kt

@@ -277,7 +277,7 @@ fun ImageVideoDescription(
 
             val firstMedia = uris.first().media
 
-            if (firstMedia.isVideo() == true || firstMedia.isImage() == true || firstMedia.isAudio() == true) {
+            if (firstMedia.isVideo() == true || firstMedia.isImage() == true) {
                 Column(horizontalAlignment = Alignment.CenterHorizontally) {
                     Box(modifier = Modifier.fillMaxWidth()) {
                         Text(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/utils/ChatFileUploadDialog.kt

@@ -234,6 +234,9 @@ private fun ImageVideoPostChat(
         )
     }
 
+    val firstMedia = fileUploadState.multiOrchestrator?.first()?.media
+
+    if (firstMedia?.isVideo() == true || firstMedia?.isImage() == true) {
         Column(horizontalAlignment = Alignment.CenterHorizontally) {
             Box(modifier = Modifier.fillMaxWidth()) {
                 Text(
@@ -256,6 +259,7 @@ private fun ImageVideoPostChat(
                 steps = 2,
             )
         }
+    }
 
     SettingSwitchItem(
         title = R.string.strip_location_metadata_label,