- Test extractWaypointBlock() with valid/invalid waypoints, unclosed blocks, multiple links
- Test hasWaypointMarker() with all marker combinations
- Test isFolderNote() with basename match, waypoint marker, both, neither, file read errors
- Test wouldAffectWaypoint() detecting removal, content changes, acceptable moves
- Test getParentFolderPath() and getBasename() helper methods
- Achieve 100% coverage on waypoint-utils.ts (52 tests)
