Use env vars for ports, add .env.TEST

- WIZARD_PORT, MYSQL_PORT, BACKEND_PORT, FRONTEND_PORT env vars
- .env.TEST with default values (8080, 3306, 8000, 3000)
- Scripts load .env.TEST automatically
- LISTEN_ADDR uses env vars
- Ports bound to 127.0.0.1 for security

cleanup-frontend.sh

@@ -8,6 +8,14 @@ set -e
 EXPOSE_PORT="off"
 COMPOSE_FILE="docker-compose-frontend.yml"
 
+# Load environment variables from .env.TEST if exists
+if [ -f ".env.TEST" ]; then
+    echo "📋 Loading .env.TEST..."
+    set -a
+    source .env.TEST
+    set +a
+fi
+
 # Parse arguments
 while [[ $# -gt 0 ]]; do
     case $1 in