refactor: split music streaming into Hope Music

Move the media server, downloader, library volume, and browser player to the
standalone hope-media-music product. Keep Hope's music tools as a thin HTTP
client of the LAN service on port 8094.

Use a stable voice-room player scope instead of ephemeral LiveKit room names.
The agent now owns the conversation handshake: fresh reported playback mutes
its input, joining pauses music, and the last participant leaving resumes only
music it paused. Peer failures remain non-fatal.

Also move the voice deploy workflow onto the active Unraid Gitea runner and
remove yt-dlp/ffmpeg/media health and volume dependencies from the image.

.gitea/workflows/rebuild.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   rebuild:
-    runs-on: runner-voice
+    runs-on: unraid
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -26,7 +26,7 @@ jobs:
             --name voice \
             --network host \
             --restart unless-stopped \
-            --health-cmd='curl -sfk https://localhost:${WEB_PORT:-9178}/ -o /dev/null && curl -sf http://localhost:7880/ -o /dev/null && curl -sf http://localhost:${MEDIA_SERVER_PORT:-8093}/media/api/healthz -o /dev/null' \
+            --health-cmd='curl -sfk https://localhost:${WEB_PORT:-9178}/ -o /dev/null && curl -sf http://localhost:7880/ -o /dev/null' \
             --health-interval=15s \
             --health-timeout=5s \
             --health-retries=3 \
@@ -34,7 +34,6 @@ jobs:
             -v /mnt/user/dev/hope-voice-api/certs:/etc/voice/certs \
             -v /mnt/user/dev/hope-voice-api/skills:/skills \
             -v /mnt/user/dev/hope-voice-api/livekit.yaml:/etc/livekit.yaml:ro \
-            -v /mnt/user/dev/hope-voice-api/media:/data/media \
             -e LIVEKIT_URL=http://localhost:7880 \
             -e LIVEKIT_API_KEY=devkey \
             -e LIVEKIT_API_SECRET=hopevoice-devsecret-2026-lan-only \
@@ -49,9 +48,8 @@ jobs:
             -e WEB_PORT=9178 \
             -e VOICE_USERS_FILE=/etc/hope/users.json \
             -e VOICE_DEFAULT_USER=shane \
-            -e MEDIA_DIR=/data/media \
-            -e MEDIA_SERVER_PORT=8093 \
-            -e YTDLP_COOKIES=/data/media/cookies.txt \
+            -e MUSIC_BASE_URL=http://192.168.86.2:8094 \
+            -e MUSIC_ROOM=voice-room \
             hope-voice-api-voice:latest
 
       - name: Verify deployment