* Fix Claude Code CLI detection for npm-local installs
`specify check` reports "Claude Code CLI (not found)" for users who
installed Claude Code via npm-local (the default installer path, common
with nvm). The binary lives at ~/.claude/local/node_modules/.bin/claude
which was not checked. Add CLAUDE_NPM_LOCAL_PATH as a second well-known
location alongside the existing migrate-installer path.
Fixes https://github.com/github/spec-kit/issues/550
* Address Copilot review feedback
- Remove unused pytest import from test_check_tool.py
- Use tmp_path instead of hardcoded /nonexistent/claude for hermetic tests
- Simplify redundant exists() + is_file() to just is_file()
AI-assisted: Changes applied with Claude Code.
* Update tests/test_check_tool.py
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update tests/test_check_tool.py
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
