/**
 * `@nifrajs/web-react/i18n` - React bindings for `@nifrajs/i18n`. `<I18nProvider locale messages>` builds a
 * `Formatter` (memoized) and provides it; `useT()` reads it. Both `locale` + `messages` are
 * serializable, so a loader returns them, the page renders with the negotiated catalog on the server,
 * and the client rebuilds the same formatter from the same props (no mismatch). Imports only `react` +
 * `@nifrajs/i18n`; no JSX (the package builds with plain `tsc`).
 */
import { type Formatter, type Messages } from "@nifrajs/i18n";
import { type ReactNode } from "react";
export interface I18nProviderProps {
    readonly locale: string;
    readonly messages: Messages;
    readonly children?: ReactNode;
}
/** Provide a {@link Formatter} (built from `locale` + `messages`) to the subtree. Memoized on
 * `locale`/`messages`, so switching locale rebuilds it and re-renders consumers. */
export declare function I18nProvider(props: I18nProviderProps): ReactNode;
/** Read the current {@link Formatter} (`{ locale, t, n, d }`). Throws if no `<I18nProvider>` is above. */
export declare function useT(): Formatter;
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