Add persistent Athena music mode switching

compose.yaml

@@ -569,6 +569,7 @@ services:
       IMAGE_WORKER: image
       RESTORE_WORKER: restore
       TTS_WORKER: qwen3
+      MUSIC_WORKER: acestep
     networks: [control]
     security_opt: ["no-new-privileges:true"]
     healthcheck:
@@ -625,6 +626,8 @@ services:
       TTS_VOICES: alloy
       TTS_DEFAULT_VOICE: alloy
       ENABLE_STT: "true"
+      ENABLE_MUSIC_MODE: "true"
+      MUSIC_START_TIMEOUT: "600"
       STT_WORKER_URL: http://whisper:8084
       STT_TIMEOUT: "300"
     networks: [frontend, control, inference]
@@ -853,6 +856,7 @@ services:
       DASHBOARD_PORT: "8099"
       ROUTER_URL: http://router:8081
       ROUTER_API_KEY: "${ROUTER_API_KEY:?ROUTER_API_KEY is required}"
+      MUSIC_UI_URL: "${MUSIC_UI_URL:-http://127.0.0.1:7861/}"
       HOST_PROC: /host/proc
       HOST_DATA: /host/data
       HOST_MODELS: /host/models