release-2.1

This release includes the development team’s Task 4 response to the QA report.

Targeted regression tests were added to address the weaknesses identified by QA, especially in pen-up marking validation, extra-step detection, loop behavior, and exact marking coordinates. The main added tests are:

• TestRS_SmallStepCountsExact
• TestRS_EdgeStopsAtBoundary
• TestRS_ExactMarkingPattern
• TestRS_PenUpDoesNotMarkNewPath

Validation after the update:

• 48/48 tests passed
• 25/25 RSTest regression tests passed
• JaCoCo coverage report generated successfully.