The globe container now uses a `visible` class instead of
`display`, allowing the Cesium viewer to be pre-created on page
load while remaining hidden until the geographic view is selected.
Add a generator script that produces the entries dataset, dedupe
entries sharing coordinates, and ship world city and country
GeoJSON assets for the globe view.
Make the timeline card spacing derive from entry count, move the
view switcher into the bottom bar, and align card and label fonts
with the timeline titles.
A Three.js site presenting 20 world history milestones as
double-sided loose-leaf pages, with three views: a leather
binder with page-flip animation, a golden timeline, and a
dotted globe with great-circle arcs.
All textures (paper, leather, registration cards, and 18
hand-drawn sketches) are generated procedurally via Canvas
2D, so no external image assets are needed beyond the Earth
map. Includes dev helper scripts for screenshots, ASCII
previews, and headless verification.