Lumeo

Use when building or editing a Blazor UI that uses the Lumeo component library (the `Lumeo` NuGet package and its satellites Lumeo.Charts / Lumeo.DataGrid / Lumeo.Editor / Lumeo.Scheduler / Lumeo.Gantt / Lumeo.Motion), or when the user mentions Lumeo components (Button, DataGrid, Sheet, Dialog, Tabs, DatePicker, Toast, …). Establishes how to look components up via the lumeo-mcp server and the non-negotiable conventions for writing correct Lumeo Razor.