NativeInputStateProvider

Read-only access to the per-tab native input state. Components that need to react to input state changes (toggle visibility, model selection, etc.) observe state, which follows the currently selected browser tab and re-emits both when the tab changes and when the active tab's state is republished.

stateForTab is for callers that already know a specific tabId and need synchronous keyed access — primarily the native input widget itself; plugins should observe state.

The writer-side counterpart is NativeInputStatePublisher, which is reserved for the native input widget; plugins must not depend on it.