fix: revert pan icon size back to h-3 w-3

Volume icon is h-3.5 w-3.5, pan icon is h-3 w-3 as requested.

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

components/tracks/Track.tsx

@@ -284,7 +284,7 @@ export function Track({
             {/* Pan */}
             <div className="flex items-center gap-2">
               <label className="text-xs text-muted-foreground flex items-center gap-1 w-16 flex-shrink-0">
-                <CircleArrowOutUpRight className="h-3.5 w-3.5" />
+                <CircleArrowOutUpRight className="h-3 w-3" />
                 Pan
               </label>
               <div className="flex-1">