LocalEventBranding

Provides the active EventFirmwareEdition (if any) to the composition tree. When a connected device reports an event firmware edition, this local is populated at the app root so consumers can pick it up without per-screen wiring: the Connections screen surfaces the edition itself, and LocalEventTheme derives the ambient theme from it. The app-bar logo is deliberately not one of those consumers — the Meshtastic identity stays in place regardless of the firmware running on the device.