feat(audio): move beat routing server-side and extend presets

Route beat-triggered manual selects from the controller server, add preset background and beat-counter UI support, and bump led-driver to include the matching pattern/runtime fixes.

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

src/models/preset.py

@@ -26,6 +26,7 @@ class Preset(Model):
             "name": "",
             "pattern": "",
             "colors": [],
+            "background": "#000000",
             "brightness": 0,
             "delay": 0,
             "n1": 0,
@@ -36,6 +37,7 @@ class Preset(Model):
             "n6": 0,
             "n7": 0,
             "n8": 0,
+            "manual_beat_n": 1,
             "profile_id": str(profile_id) if profile_id is not None else None,
         }
         self.save()