0.9.18

Added

• anchor: "bottom" on :scroll, for chat logs (MOB-481). The scroll
  opens at the end of its content. On iOS 18 and later, when content grows or
  the viewport shrinks while the view is at the end or within 32 pt of it, it
  moves to the new end; a user who has scrolled further up is left where they
  are. On iOS 17 it opens at the end and growth is left
  to SwiftUI's defaultScrollAnchor(.bottom). Vertical, non-lazy scrolls
  only; "top" (the default) is unchanged. Android needs the matching mob_new
  template. See guides/components.md.

Fixed

• An adaptive theme now follows the OS light/dark flip (MOB-479).
  Mob.Theme.AdaptiveWatcher decided whether to re-resolve by comparing the
  active theme with what the adaptive module returns after the OS had
  flipped, which never matched, so Mob.Theme.Adaptive (and any module
  registered with register_adaptive/1) stayed on the old scheme. The
  watcher now goes by what was passed to Mob.Theme.set/1: the registered
  module, or {module, overrides} (the overrides are kept), follows the OS;
  a struct, a keyword list or any other module is a fixed theme and is left
  alone. A plugin's suggested default font, applied at boot, no longer turns
  a module-set theme into a fixed one. See
  decisions/2026-10-13-adaptive-theme-follows-set-source.md.