clean up audio players

lib/widgets/players/audio.dart

@@ -36,10 +36,8 @@ class const AudioPlayer(
       return player.dispose;
     }, []);
 
-    return SizedBox(
+    return Card(
-      height: 60,
+      color: Theme.of(context).colorScheme.surfaceContainerHigh,
-      child: Card(
-        color: Theme.of(context).colorScheme.surfaceContainer,
       child: Padding(
         padding: .symmetric(horizontal: 8),
         child: PlayerControls(
@@ -60,7 +58,6 @@ class const AudioPlayer(
           ]),
         ),
       ),
-      ),
     );
   }
 }

lib/widgets/players/player_controls.dart

@@ -77,7 +77,8 @@ class const PlayerControls(
           ? Column(
               mainAxisSize: .min,
               children: [
-                slider(padding: const .symmetric(horizontal: 12)),
+                SizedBox(height: 12),
+                slider(padding: const .symmetric(horizontal: 16)),
                 Row(
                   children: [
                     playButton,
@@ -94,7 +95,8 @@ class const PlayerControls(
                 ),
               ],
             )
-          : Row(
+          : IntrinsicHeight(
+              child: Row(
                 children: [
                   playButton,
                   SizedBox(width: 8),
@@ -104,6 +106,7 @@ class const PlayerControls(
                   ...actions,
                 ],
               ),
+            ),
     );
   }
 }