Thumbnails were generated one ImageMagick process at a time. Queue the
missing ones and drain them across every core with vipsthumbnail, which
decodes and encodes faster and lets the per-process startup overlap.
Cold cache for a 92 wallpaper directory drops from 14.2s to 1.3s, and
the bundled theme previews from 2.0s to 0.26s.
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Five plugins each owned their own colors.toml watcher with subtly
different parsers, plus two ad-hoc per-theme override files
(notifications.json, image-picker-colors.json). This collapses all of
that into one source of truth: Commons/Color.qml watches colors.toml +
shell.toml and exposes Color.bar.*, Color.popups.*, Color.notifications.*,
Color.menu.*, Color.imagePicker.* for every surface to bind to.
shell.toml is generated by the existing template pipeline from
default/themed/shell.toml.tpl. Themes can ship their own shell.toml to
override individual keys; everything missing falls back to the
foundational palette via root.pick(). Settings panel is intentionally
not themable beyond the foundational tokens.
last-horizon and solitude ship a minimal shell.toml to preserve their
historical 'notification border matches Hyprland active border'
behavior, which previously came from parsing the theme's hyprland.conf
(now removed).
