Keep overlapping type sets when merging allOf
intersection treated any difference in the type keyword as an impossible schema and returned false, so an allOf member using a type array (e.g. ['string', 'null'], emitted for nullable: true) merged with a typed member (type: 'string') produced false instead of type: 'string' — dropping every property of the schema in the Schema UI and the playground.
Intersecting overlapping type sets now keeps the shared members, and only genuinely disjoint types (e.g. ['string'] with ['number']) resolve to false.
Use the explicit title of composed schemas in Schema UI
mergeAllOf now keeps an explicit title as the display alias of the composed schema (ChildA | ChildB), skips titles already covered by the other side of an intersection (DerivedConfig, array<NamedItem>), and still combines the titles of untitled intersections (Readable & Writable).