import type { ComponentType, ReactNode } from 'react';
import type { Context as ClientContext } from '@deepseek-ai/cordis';
export interface NativeWidthProps {
    side: 'left' | 'right';
    onStart(): number;
    onDrag(width: number): void;
    onCommit(width: number): void;
    onEnd(): void;
}
export interface NativeRailItem<Preview = string> {
    turn: number;
    prompt: Preview;
    response: Preview;
    anchor: {
        kind: 'loaded';
        key: string;
    };
}
export interface NativeRailProps {
    items: readonly NativeRailItem<ReactNode>[];
    activeTurn: number | null;
    busyTurn: number | null;
    onNavigate(item: NativeRailItem<ReactNode>): void;
    t(key: string, params?: {
        turn: number;
    }): string;
}
export interface HarnessConversationLayout {
    WidthHandle: ComponentType<NativeWidthProps>;
    TurnNavigator: ComponentType<NativeRailProps>;
    resolveContentWidth(column: number, preference: number | null): number;
    rootClass: string;
}
export declare function installHarnessConversationLayoutLoader(ctx: ClientContext, doc: Document): () => void;
export declare function loadHarnessConversationLayout(): Promise<HarnessConversationLayout | undefined>;
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