fix: scale track point radius by output size

nodes.py

@@ -24,6 +24,7 @@ def _list_audio_wavs() -> list[str]:
 _MIN_RADIUS = 2
 _MAX_RADIUS = 8
 _MAX_TRAIL = 50
+_REF_SHORT_SIDE = 1080
 
 
 # ---------------------------------------------------------------------------
@@ -224,13 +225,16 @@ class DrawRhythmTracks(io.ComfyNode):
 
         coords = torch.stack([coords_x, coords_y], dim=-1)
         render_frames = torch.zeros(num_frames, height, width, 3, device=device)
+        radius_scale = min(width, height) / _REF_SHORT_SIDE
 
         for t in range(num_frames):
             start = max(0, t - _MAX_TRAIL)
             for source_frame in range(start, t + 1):
                 age = t - source_frame
                 ratio = 1.0 - age / _MAX_TRAIL
-                radius = _MIN_RADIUS + (_MAX_RADIUS - _MIN_RADIUS) * ratio
+                radius = (
+                    _MIN_RADIUS + (_MAX_RADIUS - _MIN_RADIUS) * ratio
+                ) * radius_scale
                 color = _trail_color(ratio, device)
                 x, y = coords[source_frame].tolist()
                 _draw_filled_circle(render_frames[t], x, y, radius, color)