* 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
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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>