Type Alias: PresetEffect

PresetEffect = "fadeIn" | "flyIn" | "appear" | "wipe" | "grow" | "spin" | "fadeOut" | "flyOut"

A preset build-animation effect. The supported set is fixed (each is a verbatim template captured from PowerPoint); adding one means adding a fixture + template, not a new code path. See docs/contributing/design/animations.md.