A head unit is a large screen sitting an arm's length further away than a phone,
and Plezy drew phone-sized controls on it: the primary button measured 8.3 mm
against the 64 dp a car needs. The whole surface is now scaled - 1.35 by default,
adjustable in Appearance - by giving the app a smaller logical viewport and
scaling the result back, so text, spacing and touch targets grow together instead
of a font size being nudged in isolation.
The scale sits above the messenger and the root Scaffold so snackbars and dialogs
are scaled too, and insets are divided back into the scaled space so a system bar
still reserves its physical size. A scaled surface is also a short one: the setup
screen's fixed offsets and the now-playing transport are laid out to survive it,
and a mistyped scale in a hand-edited settings file is clamped rather than
failing startup.
Settings rows carried their own platform-conditional typography and
density, so on desktop and TV they rendered a 16px title, 14px subtitle
and 80px row while every other row in the app — the Focusable*ListTile
defaults plus ThemeData.listTileTheme's `dense: true` — renders 13/12
in 61px.
Drop the overrides instead of re-tuning them: the tile defaults already
encode the app's row style, and the explicit title styles were redundant
under a dense ListTile (they also masked the disabled/selected title
color). settingsOptionTitleStyle now only serves group children that are
not ListTiles, and matches the dense title unconditionally.
SettingsGroup hands its children that same compact density, so the plain
ListTiles used as non-interactive info rows stop standing 11px taller
than their interactive siblings.
Introduces shared seams for paginated views, D-pad reorder, media control
routing, async singletons and the device method channel, then points the
open-coded copies at them.
Also removes unused models and duplicated provider/server plumbing, folds
the twice-implemented artifact store in the server, and factors the
repeated Flutter toolchain prologue in CI into a composite action.
edde746