/* =============================================================================
Sitemap Filters Helper Section
Outputs collection.filters as JSON for use by the sitemap page JS.
This section is fetched via the Section Rendering API:
GET /collections/{handle}?section_id=template--22782970265828__sitemap_filters_helper
Notes:
- Only emit filter.values (not inactive_values). Inactive options are for PLP
UI grey-outs and often overlap active values — merging them duplicates sitemap links.
- Skip placeholder metafield values (N/A / NA), matching collection-filters.
============================================================================= */