v0.25.0 — Distribution & onboarding

With the theme platform matured across v0.22.0 (type tokens), v0.23.0 (surface axes + skeleton/skin) and v0.24.0 (live backdrops + motion), the next move is to make that platform distributable and cut the largest activation cost in the toolchain: the blank page. Three recent specs interlock to take an author from zero to a designed, purpose-built site — starting templates, robust install from anywhere, and presets shippable independent of a theme.