Extract the hardcoded Claude CLI local installation path to a constant
CLAUDE_LOCAL_PATH to improve maintainability and make it easier to update
if the installation path changes in the future.
Co-Authored-By: Claude <noreply@anthropic.com>
After running `claude migrate-installer`, the Claude executable is moved
from PATH to ~/.claude/local/claude. This change updates check_tool() to
prioritize checking this local path before falling back to PATH lookup.
Fixes: #123
Co-Authored-By: Claude <noreply@anthropic.com>
