fix(mobile): resolve 8 Android debug errors and Kotlin migration

- Migrate to Flutter built-in Kotlin: set builtInKotlin=true and
  newDsl=true in gradle.properties; remove id(kotlin-android) from
  app/build.gradle.kts. Eliminates the Kotlin Gradle Plugin WARNING
  that caused 8 stderr lines in the VS Code Debug console.

- Fix DashboardController lifecycle in MobileShell: move controller
  creation from _buildBody() (called on every rebuild) to
  didChangeDependencies() so it is initialised once and reused.
  Prevents repeated data loads on every tab switch and resolves the
  203 skipped frames Choreographer warning.

- Fix KcSummaryCard RenderFlex overflow (8 cards, 19px each): reduce
  icon size 28->22px, switch spacing to xs, wrap value Text in
  FittedBox(scaleDown) with fontSize 28, use bodySmall + maxLines for
  label. Cards now fit within the GridView childAspectRatio:1.6
  constraint on all phone screen sizes.

All tests pass: 27 kell_mobile + 41 design_system.

kell_creations_apps/apps/kell_mobile/android/app/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
     id("com.android.application")
-    id("kotlin-android")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
 }

kell_creations_apps/apps/kell_mobile/android/gradle.properties

@@ -1,2 +1,6 @@
 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
+# This builtInKotlin flag was added automatically by Flutter migrator
+android.builtInKotlin=true
+# This newDsl flag was added automatically by Flutter migrator
+android.newDsl=true

kell_creations_apps/apps/kell_mobile/lib/shell/mobile_shell.dart

@@ -30,8 +30,38 @@ class MobileShell extends StatefulWidget {
 class _MobileShellState extends State<MobileShell> {
   int _selectedIndex = 0;
 
+  /// Dashboard controller is created once and reused across rebuilds to avoid
+  /// re-triggering data loads on every [setState] call (e.g. tab switches).
+  late DashboardController _dashboardController;
+
   static const _titles = ['Dashboard', 'Inventory', 'Products', 'Orders', 'More'];
 
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    // Initialise the controller here (not in initState) because it needs
+    // KcAppScope which requires an inherited widget lookup.
+    if (!_dashboardControllerInitialised) {
+      final services = KcAppScope.of<MobileAppServices>(context);
+      _dashboardController = DashboardController(
+        GetDashboardSummary(
+          inventoryRepository: services.inventoryRepository,
+          productPublishingRepository: services.productPublishingRepository,
+          ordersRepository: services.ordersRepository,
+        ),
+      );
+      _dashboardControllerInitialised = true;
+    }
+  }
+
+  bool _dashboardControllerInitialised = false;
+
+  @override
+  void dispose() {
+    _dashboardController.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     final config = KcAppScope.configOf<MobileAppServices>(context);
@@ -86,15 +116,7 @@ class _MobileShellState extends State<MobileShell> {
 
     switch (_selectedIndex) {
       case 0:
-        return MobileDashboardPage(
-          controller: DashboardController(
-            GetDashboardSummary(
-              inventoryRepository: services.inventoryRepository,
-              productPublishingRepository: services.productPublishingRepository,
-              ordersRepository: services.ordersRepository,
-            ),
-          ),
-        );
+        return MobileDashboardPage(controller: _dashboardController);
       case 1:
         return MobileInventoryPage(
           repository: services.inventoryRepository,

kell_creations_apps/packages/design_system/lib/src/widgets/kc_summary_card.dart

@@ -36,11 +36,20 @@ class KcSummaryCard extends StatelessWidget {
         crossAxisAlignment: CrossAxisAlignment.start,
         mainAxisSize: MainAxisSize.min,
         children: [
-          Icon(icon, color: iconColor, size: 28),
-          const SizedBox(height: KcSpacing.sm),
-          Text(value, style: theme.textTheme.headlineMedium?.copyWith(fontSize: 32)),
+          Icon(icon, color: iconColor, size: 22),
           const SizedBox(height: KcSpacing.xs),
-          Text(label, style: theme.textTheme.bodyMedium?.copyWith(color: KcColors.neutral)),
+          FittedBox(
+            fit: BoxFit.scaleDown,
+            alignment: Alignment.centerLeft,
+            child: Text(value, style: theme.textTheme.headlineMedium?.copyWith(fontSize: 28)),
+          ),
+          const SizedBox(height: KcSpacing.xs),
+          Text(
+            label,
+            style: theme.textTheme.bodySmall?.copyWith(color: KcColors.neutral),
+            maxLines: 2,
+            overflow: TextOverflow.ellipsis,
+          ),
         ],
       ),
     );