/* =============================================================================
Sitemap Filters Helper Section
Outputs collection.filters as JSON for the sitemap page JS.
Fetched via Section Rendering API by filename (not on the collection template):
GET /collections/{handle}?section_id=sitemap-filters
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.
============================================================================= */