fix: make volume and pan icons the same size

Changed both icons from h-3 w-3 to h-3.5 w-3.5 for consistent sizing.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

components/tracks/Track.tsx

@@ -264,7 +264,7 @@ export function Track({
             {/* Volume */}
             <div className="flex items-center gap-2">
               <label className="text-xs text-muted-foreground flex items-center gap-1 w-16 flex-shrink-0">
-                <Volume2 className="h-3 w-3" />
+                <Volume2 className="h-3.5 w-3.5" />
                 Volume
               </label>
               <div className="flex-1">
@@ -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 w-3" />
+                <CircleArrowOutUpRight className="h-3.5 w-3.5" />
                 Pan
               </label>
               <div className="flex-1">