/** Matches app-frontend `useCopyToClipboard` reset window. */
export declare const COPY_FEEDBACK_MS = 1500;
/** Idle / copied labels — same strings as app-frontend `Code` copy button. */
export declare function copyButtonContent(isCopied: boolean, idleLabel?: string): {
    label: string;
    state: 'idle' | 'copied';
};
/** Expressive Code joins multi-line `data-code` with U+007F. */
export declare function ecDataCodeToText(dataCode: string): string;
export type TryCopyTextDeps = {
    writeText?: (text: string) => Promise<void>;
};
/**
 * Copy text like app-frontend `useCopyToClipboard`: succeed → true; failure → false.
 * Inject `writeText` in tests; browser path uses `navigator.clipboard.writeText`.
 */
export declare function tryCopyText(text: string, deps?: TryCopyTextDeps): Promise<boolean>;
export declare function fileKindFromName(name: string): string | null;
/** Fence language → tab label when the block has no `title="…"`. */
export declare function defaultTitleFromLang(lang: string): string;
/** True when the title looks like a path/filename (not a bare language id). */
export declare function isFilePathTitle(title: string): boolean;
/** Language id / filename → short chip (TS, JS, …). */
export declare function kindFromTitle(title: string): string | null;
export declare function paintCopyButton(button: HTMLButtonElement, isCopied: boolean): void;
/** Green “Copied!” then restore the idle label after COPY_FEEDBACK_MS. */
export declare function showCopySuccess(button: HTMLButtonElement): void;
/** Idle chrome used by docs EC and explorer MCP / Try it copy controls. */
export declare function copyButtonMarkup(attrs?: {
    copyTarget?: string;
    copyValue?: string;
    id?: string;
    label?: string;
}): string;
export declare function enhanceCodeBlockTitles(root?: ParentNode): void;