OEM detail "slow load" was two things, not the query (DB 135ms / API
13-120ms):
1. The parts-panel link opened a NEW TAB → full SPA cold boot every
click. Switch to in-app client navigation on plain click (real href
kept, so ctrl/cmd/middle-click still opens a new tab).
2. The /p/oem response shipped each article's oeNumbers + compatible
lists (up to 200 each × 60 articles) that the UI never renders — 96%
of a 370 KB payload. Ship lean articles; aggregates already carry
the cross-refs. 60-article code: 370 KB → ~12 KB.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>