teernisse
12eb55f4b8
Composable filter pipeline that processes SavingItem slices through chained predicates: BOGO detection (category match), exact category match, substring department match, and keyword search across title and description fields. All text matching is case-insensitive. Includes utility functions for HTML entity unescaping (CleanText), nil-safe string pointer dereferencing (Deref), and case-insensitive slice membership (ContainsIgnoreCase). An optional limit truncates results after all filters are applied. Tests cover each filter in isolation, combined filters, nil field safety, and the Categories aggregation helper.