Consolidate shared grid and band-editor styles from CatalogsGrid.razor.css and MassDataGrid.razor.css into app.css for improved maintainability and consistency. Only component-specific min-width rules remain in the respective files. Also includes minor formatting cleanups in app.css.
Moved CSS from inline <style> blocks in CatalogsGrid.razor and MassDataGrid.razor to dedicated CatalogsGrid.razor.css and MassDataGrid.razor.css files. This improves maintainability and keeps styling concerns separate from component logic. No changes to the actual styles were made.