Major refactor to decouple InfoPanel logic from grid base. Introduces MgGridWithInfoPanel wrapper component to manage grid and InfoPanel layout and communication. InfoPanels are now customizable via Razor templates with named slots (header, footer, etc.), and grid-to-InfoPanel communication is routed through the wrapper. Removes legacy C#-only InfoPanel base classes and parameters from grid base. This improves flexibility, composability, and maintainability of grid+InfoPanel UIs.
Loretta
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