Updates global theme settings for a project. Send only the top-level keys you want to change.
The API performs a shallow merge at the top level. If you send a nested object, that object replaces the existing value for its top-level key. Fetch the current settings first when you need to preserve sibling values.
When stored values change, Weaverse attempts to create a theme snapshot of the merged result before writing it. The attempt is deduplicated against the latest snapshot and is best-effort: snapshot failure is non-fatal, and the settings write continues. Do not assume that every successful update has a restorable snapshot.After a successful stored change, the route uses the same cache-invalidation path as a Studio save. This does not guarantee a specific propagation time; fetch the settings again to verify the stored result.
