feat: add Mac host to dashboard terminal

Add a dedicated Mac terminal target with separate SSH host/user/key settings and mount a dedicated Mac key file for dashboard containers.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

dashboard/docker-compose.dev.yml

@@ -14,6 +14,10 @@ services:
       - SSH_USER=zjgump
       - VPS_SSH_HOST=158.101.140.85
       - VPS_SSH_USER=jimmyg
+      - CADDY_VPS_SSH_HOST=161.33.182.109
+      - CADDY_VPS_SSH_USER=ubuntu
+      - MAC_SSH_HOST=192.168.31.22
+      - MAC_SSH_USER=jimmyg
       - SECRET_KEY=${SECRET_KEY}
       - ADMIN_USER=jimmy
       - ADMIN_PASSWORD_HASH=${ADMIN_PASSWORD_HASH}
@@ -27,6 +31,7 @@ services:
       - /volume1:/volume1
       - /volume1/docker/nas-dashboard/ssh/dashboard_terminal:/app/ssh/id_ed25519:ro
       - /volume1/docker/nas-dashboard/ssh/vps_terminal:/app/ssh/vps_id_ed25519:ro
+      - /volume1/docker/nas-dashboard/ssh/mac_terminal:/app/ssh/mac_id_ed25519:ro
       - /volume1/docker/nas-dashboard/ssh/known_hosts:/app/ssh/known_hosts:ro
       - /volume1/docker/chat-summarizer/data:/app/data/chat-summarizer:ro
     healthcheck: