Remove dead code from abandoned 3D printing initiative: - Delete jobManager.ts (had unbounded memory growth) - Delete openscad.worker.ts (unused) - Delete 3D model files from public/ - Remove openscad-wasm-prebuilt dependency - Clean up doc references 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>