export interface UseFileUploadWithProgressProps {
    acceptedFileTypes?: string;
    onUploadSuccess?: () => void;
    onUploadError?: (error: Error) => void;
    /** Names already taken, so a clash is stored with a numeric suffix rather than shadowing. */
    existingNames?: string[];
}
export interface UploadState {
    uploading: boolean;
    progress: number;
}
/**
 * The sidebar's add-file button, on the shared intake: one task store drives the toast, the
 * section's progress bar and the marker ring, so no surface tracks progress of its own.
 */
export declare function useFileUploadWithProgress({ acceptedFileTypes, onUploadSuccess, onUploadError, existingNames, }?: UseFileUploadWithProgressProps): {
    handleAddFile: () => void;
    handleFileUpload: (file: File) => Promise<void>;
    uploadState: UploadState;
};
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