Ship the portal FastAPI controller with presets, sequences, and live audio.

Move the app under src/, add ring-spanning patterns with shared fonts and
beat-driven motion, and wire global audio settings into the web UI.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/panel_rgb_cycle.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""Cycle full-panel red / green / blue on Pico panel(s)."""
+
+from __future__ import annotations
+
+import argparse
+import sys
+import time
+
+from leds.colors import RGB_CYCLE
+from leds.panel_udp import PanelClient, add_panel_args, format_panel_targets, panel_targets_from_args
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description="RGB cycle on Pico panel(s)")
+    add_panel_args(parser)
+    parser.add_argument("--pause", type=float, default=1.0)
+    args = parser.parse_args()
+
+    targets = panel_targets_from_args(args)
+    print(
+        f"RGB cycle -> {format_panel_targets(targets, args.port)} "
+        f"brightness={args.brightness:g} (Ctrl+C to stop)"
+    )
+
+    try:
+        with PanelClient.from_args(args) as client:
+            while True:
+                for label, color in RGB_CYCLE:
+                    print(f"  {label}")
+                    client.fill(color)
+                    time.sleep(args.pause)
+    except KeyboardInterrupt:
+        print("\nStopped.")
+    except OSError as exc:
+        print(f"Network error: {exc}", file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())