Add build fallback, manual installation, and config sync#2

vncntt wants to merge 2 commits intopipmc:mainpipmc/claude-code-into-devcontainer:mainfrom

vncntt:fix/build-fallback-and-config-syncvncntt/claude-code-into-devcontainer:fix/build-fallback-and-config-syncCopy head branch name to clipboard