Exploration spec (sort-integration-spec.html) covers 4 placement variants
with comparison matrix. Final spec (sort-inline-final-spec.html) locks in
Variant A (inline sort in search bar row) with full desktop/mobile states,
dropdown interaction anatomy, loading/empty states, and backend wiring checklist.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
