- Rename all cts-work references to pp-planer (valet, sanctum, playwright, e2e, docs)
- Fix docker-compose build context to use project root with build/Dockerfile
- Add .dockerignore to exclude unnecessary files from Docker build
- start_dev.sh: stale PID cleanup, dependency checks, APP_KEY check, process health verification
- stop_dev.sh: fix set -e crash on arithmetic, report already-dead processes, idempotent exit
