/** Fallback bucket for reports with no area. */
export declare const FEEDBACK_FINGERPRINT_DEFAULT_AREA = "general";
/** Max length of the normalized title used for hashing (bounds input). */
export declare const FEEDBACK_FINGERPRINT_TITLE_LIMIT = 80;
/**
 * Normalize a title for fingerprinting:
 * - lowercase
 * - remove punctuation (non-alphanumeric/non-CJK replaced by nothing)
 * - collapse whitespace runs to a single space
 * - trim, then truncate to FEEDBACK_FINGERPRINT_TITLE_LIMIT chars
 *
 * Kept CJK-safe: CJK ideographs are matched by /[^\w\u4e00-\u9fff]/g below.
 * '/\w/' in JS covers Latin letters/digits/underscore; we explicitly keep
 * the CJK range so Chinese titles are not gutted.
 */
export declare function normalizeFeedbackTitle(value: string): string;
/**
 * Compute the sha256 hex fingerprint for a feedback report.
 *
 *   fingerprint = sha256hex(`${type}|${area ?? general}|${normalizedTitle}`)
 *
 * Derived from a SHA-256 hash of normalized, content-derived values — a
 * Unicode NFC normalization could alter the hash for visually identical
 * strings, but for dedup purposes minor form differences are acceptable.
 */
export declare function computeFeedbackFingerprint(args: {
    type: string;
    title: string;
    area?: string;
}): string;
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