* fix(install): use go install to match docs Makefile install target now uses 'go install' instead of cp to ~/.local/bin, aligning with documented installation method and GOPATH/GOBIN conventions. Closes: hq-93c Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * fix(beads): set BEADS_DIR for config * test(config,rig): update startup and bd stubs --------- Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>