/**
 * Strips non-printable characters from a string and trims whitespace. Replaces `.trim()` at data-collection points to ensure string values contain only visible
 * content. Safe to call on already-clean strings — the regex replacement is a no-op when no non-printable characters are present.
 * @param value - The string to sanitize.
 * @returns The sanitized string with non-printable characters removed and whitespace trimmed.
 */
export declare function sanitizeString(value: string): string;
/**
 * Tests whether a string contains any non-printable characters. Used for startup warnings when loading persisted data — the warning alerts users to corruption
 * without modifying the loaded values.
 * @param value - The string to test.
 * @returns True if the string contains at least one non-printable character.
 */
export declare function containsNonPrintable(value: string): boolean;