/**
 * Extract key terms from page content and title for FTS5 query building.
 * Prioritizes: title words > headings > bold text > first paragraph.
 * Returns up to 20 deduplicated, lowercased, stopword-free terms.
 */
export declare function extractKeyTerms(content: string, title: string): string[];
export declare function removeStopwords(words: string[]): string[];
export declare function extractHeadings(content: string): string[];
export declare function extractBoldText(content: string): string[];
export declare function extractFirstParagraph(content: string): string;
export declare function buildFTS5Query(terms: string[]): string;
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