/**
 * Pure helpers for the dictation hook: paced text reveal ("drip") and the
 * transcription language hint.
 */
/** Cadence of the word-drip renderer (ms per step). */
export declare const DRIP_INTERVAL_MS = 55;
export declare class DictationDripUtils {
    /**
     * Next paced step toward `processed`: normally one word per tick so text
     * flows evenly instead of landing in bursty chunks; proportionally larger
     * steps when a burst put us far behind. Assumes `processed` extends
     * `displayed` (callers reconcile immediately otherwise).
     */
    static nextDripText({ displayed, processed, }: {
        displayed: string;
        processed: string;
    }): string;
    /** Normalize a BCP-47 browser locale into the hint OpenAI accepts. */
    static languageHint(locale: string | undefined): string | undefined;
}
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