Fix Docker Compose for Mac dev mode

- Replace all ghcr.io images (blocked without auth) with local Dockerfiles:
  snapserver/snapclient from debian:bookworm-slim,
  mopidy from debian:bookworm-slim + Python/GStreamer,
  librespot disabled in dev (v0.8.0 has vergen dep bug)
- Fix duplicate 'image' and 'version' keys in compose files
- Dev mode: zones + librespot use alpine dummy containers
- Dashboard dev: use upstream node:20-alpine directly (no custom build)
- Port changed to 8090 (8080 taken by Supabase)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.dev.yml

@@ -1,5 +1,3 @@
-version: "3.9"
-
 # Development override – run without any hardware.
 # Usage: docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d
 
@@ -9,50 +7,53 @@ services:
     environment:
       - SIGNALK_DEMO=true   # Built-in demo NMEA data generator
 
-  # Spotify Connect still works over TCP on dev (no host network needed)
+  # Librespot disabled in dev – dashboard uses mock Spotify data
   librespot:
-    environment:
-      - LIBRESPOT_DISABLE_DISCOVERY=false
-    ports:
-      - "57621:57621/udp"
-      - "57621:57621/tcp"
+    image: alpine:latest
+    entrypoint: []
+    command: ["sh", "-c", "echo 'librespot: dev mode, mock active' && sleep infinity"]
+    restart: "no"
+    volumes: []
+    ports: []
 
-  # avahi container for AirPlay mDNS discovery on Mac/Windows
-  avahi:
-    image: flungo/avahi
-    restart: unless-stopped
-    network_mode: host
-    volumes:
-      - /var/run/dbus:/var/run/dbus
-
-  # Null-player zones – no audio hardware needed
+  # Zones disabled in dev – dashboard uses Snapcast mock
   zone-salon:
-    command: snapclient --host snapserver --hostID zone-salon --player null
+    image: alpine:latest
+    entrypoint: []
+    command: ["sleep", "infinity"]
+    restart: "no"
 
   zone-cockpit:
-    command: snapclient --host snapserver --hostID zone-cockpit --player null
+    image: alpine:latest
+    entrypoint: []
+    command: ["sleep", "infinity"]
+    restart: "no"
 
   zone-bug:
-    command: snapclient --host snapserver --hostID zone-bug --player null
+    image: alpine:latest
+    entrypoint: []
+    command: ["sleep", "infinity"]
+    restart: "no"
 
   zone-heck:
-    command: snapclient --host snapserver --hostID zone-heck --player null
+    image: alpine:latest
+    entrypoint: []
+    command: ["sleep", "infinity"]
+    restart: "no"
 
   # Vite dev server with HMR instead of built nginx image
   dashboard:
-    build: .
     image: node:20-alpine
+    entrypoint: []
     working_dir: /app
     volumes:
       - ./dashboard:/app
       - /app/node_modules
-    command: sh -c "npm install && npm run dev -- --host 0.0.0.0 --port 8080"
+    command: ["sh", "-c", "npm install && npm run dev -- --host 0.0.0.0 --port 8090"]
     ports:
-      - "8080:8080"
+      - "8090:8090"
     environment:
       - VITE_SNAPCAST_HOST=localhost
       - VITE_SIGNALK_HOST=localhost
       - VITE_MOPIDY_HOST=localhost
       - VITE_JELLYFIN_HOST=localhost
-    # Override the build-based image
-    image: node:20-alpine