feat: add equality operators, make history screen paginated, random performance updates

lib/views/dev_menu_view.dart

@@ -107,6 +107,12 @@ class _DevMenuViewState extends State<DevMenuView> {
                 subtitle: 'Show FPS, memory, widget count',
                 onTap: () => _showDebugOverlayInfo(),
               ),
+              _Tile(
+                icon: Icons.error_outline_rounded,
+                title: 'Error screen',
+                subtitle: 'View the error screen UI',
+                onTap: () => context.push('/error'),
+              ),
             ],
           ),
           _Section(
@@ -141,6 +147,14 @@ class _DevMenuViewState extends State<DevMenuView> {
                 subtitle: 'Set all products below threshold',
                 onTap: vm.isLoading ? null : () => vm.simulateLowStock(),
               ),
+              _Tile(
+                icon: Icons.history_rounded,
+                title: 'Generate 100 mock orders',
+                subtitle: 'Random customers, items, and amounts',
+                onTap: vm.isLoading
+                    ? null
+                    : () => vm.generateMockOrders(count: 100),
+              ),
             ],
           ),
           _Section(