export type MigrationPhase = 'disabled' | 'idle' | 'checking' | 'available' | 'downloading' | 'completed' | 'failed';
export interface MigrationTarget {
    version: string;
    versionCode: number;
    downloadUrl: string;
    kind: 'pkg' | 'exe';
}
export interface MigrationSnapshot {
    phase: MigrationPhase;
    currentVersion: string;
    target?: MigrationTarget;
    jobId?: string;
    downloadedBytes: number;
    totalBytes?: number;
    prompt: boolean;
    error?: string;
    fileName?: string;
}
export declare function migrationDownloadProgress(status?: MigrationSnapshot): string;
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