MUI White-Label and Multi-Theme Systems Nested ThemeProvider MUI's can be nested. Inner providers merge with or override the outer theme. Use this to scope different visual treatments to different sections of the app. Nested Theme with Callback (Merge Instead of Replace) Pass a function to to receive the outer theme and merge selectively: --- Dynamic Theme Loading Load theme configuration from an API or database at runtime. This is the foundation of any white-label system. --- Theme Composition Use (shipped with MUI as ) to layer tenant overrides on top of a base theme. This ensures tenants o…