Initial commit

lib/shared/layout/adaptive_card_grid.dart

@@ -0,0 +1,21 @@
+import 'dart:io' show Platform;
+
+
+const double kRichCardMinWidth = 300;
+
+
+final double kPosterCardMinWidth = Platform.isAndroid ? 130 : 180;
+
+
+const double kCardGap = 12;
+
+
+int cardColumnsFor(
+  double width, {
+  double minCardWidth = kRichCardMinWidth,
+  int maxCols = 4,
+}) {
+  if (width <= 0) return 1;
+  final cols = (width / minCardWidth).floor();
+  return cols.clamp(1, maxCols);
+}