fix : mount /var/www as /mnt/apps to avoid conflict with /var/www/html

Host /var/www contains all apps. Mounting it at /mnt/apps avoids
overwriting the container's /var/www/html where Central lives.
App paths in the UI should use /mnt/apps/ prefix.

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

infra/prod/docker-compose.yml

@@ -9,9 +9,7 @@ services:
       - ./config/jwt:/var/www/html/config/jwt:ro
       - ./uploads:/var/www/html/var/uploads
       - /var/run/docker.sock:/var/run/docker.sock
-      - /var/www/sirh:/var/www/sirh
-      - /var/www/lesstime:/var/www/lesstime
-      - /var/www/inventory:/var/www/inventory
+      - /var/www:/mnt/apps
     extra_hosts:
       - "host.docker.internal:host-gateway"
     restart: unless-stopped