fix: hide codec toggle when video compression is set to uncompressed

When the compression quality slider is set to UNCOMPRESSED (value 3),
no encoding happens so the H264/H265 codec choice is irrelevant. Hide
the codec toggle in this case to avoid confusion.

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

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

@@ -302,7 +302,7 @@ fun ImageVideoDescription(
                 }
             }
 
-            if (uris.first().media.isVideo() == true) {
+            if (uris.first().media.isVideo() == true && mediaQualitySlider != 3) {
                 SettingSwitchItem(
                     title = R.string.video_codec_h265_label,
                     description = R.string.video_codec_h265_description,