75a0f2e981
Add MARKETPLACE_ROOT constant to paths.ts and update 5 source files to use centralized path constants instead of hardcoded ~/.claude paths. Preserves backwards compatibility when CLAUDE_CONFIG_DIR is not set. Based on PR #634 by @Kuroakira, cherry-picked onto main due to build artifact merge conflicts (source changes applied cleanly). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>