The Garage SDKs, in the open

garage_auth, garage_entitlements, garage_iap and garage_ui, moved out of
Garage-Services and Metro-Map-Maker into one public repo. MIT, one readme,
docs under docs/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013F4NWNvYcdeSgqbWMT1VQ7

garage_ui/lib/app.dart

@@ -0,0 +1,111 @@
+import "package:flutter/widgets.dart";
+
+import "package:garage_ui/scrollbar.dart";
+import "package:garage_ui/theme/garage_theme.dart";
+
+/// The application shell for Garage UI apps.
+///
+/// This deliberately uses [WidgetsApp] rather than [MaterialApp]. Garage UI
+/// owns the visual system while Flutter still supplies routing, overlays,
+/// media queries, directionality, and localization plumbing.
+class GarageApp extends StatelessWidget {
+  const GarageApp.router({
+    super.key,
+    required this.routerConfig,
+    required this.theme,
+    this.title = "",
+    this.builder,
+    this.locale,
+    this.localizationsDelegates,
+    this.supportedLocales = const <Locale>[Locale("en", "US")],
+    this.debugShowCheckedModeBanner = false,
+  });
+
+  final RouterConfig<Object> routerConfig;
+  final ThemeData theme;
+  final String title;
+  final TransitionBuilder? builder;
+  final Locale? locale;
+  final Iterable<LocalizationsDelegate<dynamic>>? localizationsDelegates;
+  final Iterable<Locale> supportedLocales;
+  final bool debugShowCheckedModeBanner;
+
+  @override
+  Widget build(BuildContext context) {
+    return WidgetsApp.router(
+      key: key,
+      title: title,
+      routerConfig: routerConfig,
+      color: theme.colorScheme.background,
+      locale: locale,
+      localizationsDelegates: localizationsDelegates,
+      supportedLocales: supportedLocales,
+      debugShowCheckedModeBanner: debugShowCheckedModeBanner,
+      // the Builder matters: without it `builder` is handed the context ABOVE
+      // this GarageTheme, so GarageTheme.of() asserts inside the very callback
+      // you were given for theming.
+      // ScrollConfiguration, not WidgetsApp's `scrollBehavior` - that
+      // parameter only exists on MaterialApp/CupertinoApp.
+      builder: (context, child) => ScrollConfiguration(
+        behavior: const GarageScrollBehavior(),
+        child: GarageTheme(
+          data: theme,
+          child: Builder(
+            builder: (themedContext) =>
+                builder?.call(themedContext, child) ??
+                child ??
+                const SizedBox.shrink(),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+/// Scrolling without Material's overscroll glow.
+///
+/// The default ScrollBehavior hangs a GlowingOverscrollIndicator off every
+/// scrollable on Android and Fuchsia - the grey arc that swells out of the
+/// top or bottom edge when you drag past the end. Its a Material idiom, and
+/// this kit isnt a Material app: it paints a big soft shape over flat chrome
+/// and reads as a rendering fault rather than as feedback.
+///
+/// Physics and drag devices are untouched, so a list still throws and settles
+/// the way the OS expects - it just doesnt glow at the ends. iOS and desktop
+/// never had the glow in the first place, so this only levels the other
+/// platforms up to what they already do.
+///
+/// The scrollbar is ours too. The base behaviour hands desktop a stock
+/// [RawScrollbar] - 8px, square ends, a hardcoded grey that knows nothing
+/// about the scheme - and thats the pale bar that used to sit beside every
+/// nav list. [GarageScrollbar] replaces it here, once, for every scrollable
+/// in the app. Touch platforms keep no bar at all, same as the default.
+class GarageScrollBehavior extends ScrollBehavior {
+  const GarageScrollBehavior();
+
+  @override
+  Widget buildOverscrollIndicator(
+    BuildContext context,
+    Widget child,
+    ScrollableDetails details,
+  ) => child;
+
+  @override
+  Widget buildScrollbar(
+    BuildContext context,
+    Widget child,
+    ScrollableDetails details,
+  ) {
+    switch (getPlatform(context)) {
+      case TargetPlatform.linux:
+      case TargetPlatform.macOS:
+      case TargetPlatform.windows:
+        return GarageScrollbar(controller: details.controller, child: child);
+
+      case TargetPlatform.android:
+      case TargetPlatform.fuchsia:
+      case TargetPlatform.iOS:
+        return child;
+    }
+  }
+}