FindBeadsDir() now checks for actual beads project files before returning
a .beads directory. This prevents false positives when ~/.beads/ exists
only for daemon registry (registry.json).
Changes:
- Add hasBeadsProjectFiles() helper that checks for:
- metadata.json or config.yaml (project config)
- *.db files (excluding backups and vc.db)
- *.jsonl files (JSONL-only mode)
- Update FindBeadsDir() to validate directories during tree search
- Add comprehensive tests for project file detection
- Update version_tracking_test.go to create project files
Fixes#420🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude <noreply@anthropic.com>
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