fix: include underscore in path normalization regex

[tiann]

No description provided.

[cruzanstx]

Confirmed this bug in production

Just hit this exact issue with a project path containing an underscore.

Crash Details

• Project path: /storage/projects/docker/youtube_summaries
• Expected Claude path: -storage-projects-docker-youtube-summaries (underscore → hyphen)
• happy-cli looked for: -storage-projects-docker-youtube_summaries (underscore preserved)

Log excerpt

[claudeCheckSession] Path /root/.claude/projects/-storage-projects-docker-youtube_summaries/5a891b9f-daa5-4e65-9b75-31ab8b8394f7.jsonl does not exist

Result: "Process exited unexpectedly"

This fix is needed - Claude Code normalizes underscores to hyphens but getProjectPath() does not.

[cruzanstx]

@tiann Could you rebase this on main? There are merge conflicts preventing it from being merged.

This fix is needed - just confirmed a crash in production due to this issue (see my comment above).