Full rearchitecture using Claude

- event bus systen
- all components are independent
- preparation for web frontend

python-backend/scenarios/playlist_end.txt

@@ -0,0 +1,19 @@
+# Reaching the end of a playlist stops playback and runs the off animation.
+# eule has two tracks of 5s each.
+
+place eule
+expect playing true
+
+wait 11s
+expect playing false
+expect ring EffectReverseSwipe
+expect brightness 0.00
+
+# the figure is still on the reader, but nothing is playing
+expect figure eule
+
+# taking it off and putting it back starts from the top again
+remove
+place eule
+expect playing true
+expect track 0

python-backend/scenarios/smoke.txt

@@ -0,0 +1,51 @@
+# A figure is placed, plays, is taken off mid-playlist and put back.
+# Run it against fake hardware with:
+#   python -m musicmouse --config <config.yml> --simulate --script scenarios/smoke.txt
+# The test suite runs the same file on a fake clock.
+
+expect playing false
+expect figure none
+
+place fuchs
+expect figure fuchs
+expect playing true
+expect track 0
+expect ring EffectSwipeAndChange
+expect brightness 0.50
+
+# each simulated track is 5s by default
+wait 6s
+expect track 1
+
+press right
+expect track 2
+
+press left
+expect track 1
+
+remove
+expect figure none
+expect playing false
+expect ring EffectReverseSwipe
+expect brightness 0.00
+
+# putting the same figure back resumes rather than restarting
+place fuchs
+expect playing true
+expect track 1
+
+# a different figure always starts from the top
+place eule
+expect playlist eule
+expect track 0
+
+turn 2
+expect volume 50
+
+turn -4
+expect volume 30
+
+touch left_ear
+expect mouse EffectStaticConfig
+release left_ear
+expect mouse EffectRandomTwoColorInterpolationConfig