ConstDraw an inset cell (for grid slots, card placeholders).
Optionalconfig: DepthCellConfigDraw a complete grid background with N×M inset cells.
Number of columns
Size of each cell (square)
Optionalconfig: DepthGridConfigGrid configuration
Draw a rounded rect with shadow, fill, border, and top-edge highlight.
Optionalconfig: DepthPanelConfig
Static utility for drawing visually rich panels, cells, and grids with layered shadows, highlights, and borders for depth.