Nightly/release workflows: matrix tweaks, artifact path fixes. Package-macos: streamline dmg build, codesigning improvements. Install scripts: rewrite install.sh and install-nightly.sh with robust error handling, add uninstall.sh, overhaul update.sh.
homes/ directory can contain files owned by other UIDs (root, etc.) because Docker containers run as different users. Normal rm -rf fails with Permission denied. Now falls back to sudo rm -rf automatically.