clean: remove debug logging, final viz cleanup

scripts/led-matrix-viz.py

@@ -2,7 +2,7 @@
 """Listen for MIDI events via UDP and display note activity on LED matrix.
 
 Event-driven: renders and sends frame immediately on each MIDI event.
-Background 5 FPS refresh catches any lost frames from the router.
+Background 1 FPS refresh catches any lost frames from the router.
 """
 import socket, msgpack, time, os, select
 
@@ -131,7 +131,6 @@ def main():
                                 changed = True
                         if changed:
                             events_processed += 1
-                            print(f"[viz] note {note} {'on' if vel > 0 else 'off'} active={len(active_notes)}", flush=True)
                             params = render(active_notes)
                             if params != last_sent_params:
                                 msg_id = (msg_id + 1) % 65535
@@ -144,10 +143,8 @@ def main():
             if ok:
                 pending_bytes = None
                 frames_sent += 1
-                print(f"[viz] sent frame #{msg_id}", flush=True)
             else:
                 frames_dropped += 1
-                print(f"[viz] drop frame #{msg_id}", flush=True)
 
         # Background refresh: resend last params to recover from router drops
         if refresh_due: