- Adjust copyright notices for extended license coverage (2025-2026).
- Modernize constants with `constexpr` replacements, improving type safety and clarity.
- Enforce `nullptr` usage over `NULL` throughout, aligning with modern C++ practices.
- Add various enhancements to ImPlot legends, markers, and axes behavior.
- Introduce additional helper methods for time handling and timestamp calculations.
- Address UI and typo improvements in comments and documentation, refining accuracy.