Function mergeStoreyRefs

mergeStoreyRefs(
prior: readonly { expressId: number; modelId: string }[],
next: readonly { expressId: number; modelId: string }[],
): { expressId: number; modelId: string }[]
Dedupe-merge two StoreyRule.refs lists by (modelId, expressId), used when a Ctrl-click accumulates another storey into an existing filter (HierarchyPanel).
Parameters
- prior: readonly { expressId: number; modelId: string }[]
- next: readonly { expressId: number; modelId: string }[]
Returns { expressId: number; modelId: string }[]