Document the shared Vanilla/React Auto API, company selection, styling ownership and preserved card design. Preserve P5-2/P5-3 and P5-4 implementation reports and their historical verification boundaries.
Integrate P5-1B through P5-4 shared Core layout, collapse, zoom/pan/fit, company roots and keyboard accessibility. Include React/HTML examples, virtual 20/100/300 employee fixtures, focused checks and the additive data contract.