Complete RectangularGridDragSelection implementation#2

Draft

Copilot wants to merge 6 commits intomainfrom

copilot/complete-rectangular-grid-drag-selection

Commits on Dec 8, 2025

Initial plan
Copilot
committed
Complete RectangularGridDragSelection constructors and core mouse interaction methods

Copilot
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DavidRichardson02
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Add reset method and getter methods to RectangularGridDragSelection

Copilot
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DavidRichardson02
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Update documentation to reflect completed RectangularGridDragSelection implementation

Copilot
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DavidRichardson02
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Fix code review issues: complete comment and use int for loop variables

Copilot
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DavidRichardson02
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Add safety checks to updateGridCells to prevent division by zero and excessive memory allocation

Copilot
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DavidRichardson02
committed