App 2.44.0: the pumpkin light follows the kick drum, behind a switch

MusicPulse reads 40-120 Hz and lights only on jumps of the bass, so
held notes and bass lines stay dark. Settings gets "Pumpkin light
follows the music" (Halloween only, off by default); off, the audio
analyser never starts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

THEMES.md

@@ -262,8 +262,9 @@ the range ("here lies … km"), and the bats are the range too, one per 50 km; P
 gravestones, the one engaged lit. The moon holds the clock, a sign hanging from a cobweb has trip,
 usage, climate and odometer, and the hill along the bottom is the last two minutes of power. While
 you drive the bats fly, the potion bubbles and the ghost floats (where there is room for it, as on
-this screen). With Bluetooth or CarPlay music playing, the pumpkin's glow swells and its carving
-brightens on the beat; the radio cannot be heard, so it burns as usual then. The app turns the
+this screen). With "Pumpkin light follows the music" on (Settings, shown with this style; off by
+default) and Bluetooth or CarPlay music playing, the pumpkin's glow flares and its carving
+brightens on each kick drum; the radio cannot be heard, so it burns as usual then. The app turns the
 pumpkin's orange with it.
 
 ![Halloween with the navigation](screenshots/themes/halloween-panel.png)