Long cross-reference lists (some parts have 90+ aftermarket numbers, 160+ OE codes) were hard to scan. Add a filter input that matches across all three sections (matched articles, aftermarket equivalents, OE cross-refs) by brand (substring) or code (normalised, so "1j0 973" finds "1J0 973 702"). Clear button + "no results" state. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>