Operator: 'switching one breaks it' — picking a category reset the
active Sort + Price. Cause: facet category links / 'All' link / top
chips / lane 'See all' all pointed at a bare {tag_base}/tag/{slug}
with NO query string, so a click dropped ?sort= / ?price_*. (The
Sort select / Price form already preserved the tag via action='' +
path and each other as sibling fields — only category nav lost state.)
Fix: one shared facet_qs(sort_key, price_min, price_max) macro in
_facet_nav.j2 returning the ?sort=...&price_min=...&price_max=...
suffix, appended to every category/All/chip/See-all href in
_facet_nav.j2, home.j2, shop.j2. URL state, NOT localStorage
(operator's suggestion): shareable, no-JS, back-button correct, and
the destination SERP already reads those params. The & is HTML-escaped
to & in hrefs (Jinja autoescape) — browsers decode it fine.
Tests: +test_facet_links_preserve_sort_and_price; updated
test_tag_detail_renders_facet_sidebar +
test_facet_category_link_renders_tag_detail_not_home for the new
(correct) query-carrying behavior. 1135 passed.
Docs: mps-24.md Phases 2.8e–2.8h.
russell@unturf.com
3bb05e4b5d