Refactor AddDeviceTypeWidget for Improved Error Handling and Loading States:

- Extracted loading and error handling logic into separate methods for better readability and maintainability.
- Updated UI to utilize centralized loading and failure widgets, enhancing user experience during data fetching.

lib/pages/space_management_v2/modules/tags/presentation/widgets/add_device_type_widget.dart

@@ -21,22 +21,14 @@ class AddDeviceTypeWidget extends StatelessWidget {
           backgroundColor: ColorsManager.whiteColors,
           content: BlocBuilder<ProductsBloc, ProductsState>(
             builder: (context, state) => switch (state) {
-              ProductsInitial() => const Center(
-                  child: CircularProgressIndicator(),
-                ),
-              ProductsLoading() => const Center(
-                  child: CircularProgressIndicator(),
-                ),
+              ProductsInitial() => _buildLoading(context),
+              ProductsLoading() => _buildLoading(context),
               ProductsLoaded(:final products) => ProductsGrid(
                   products: products,
                 ),
-              ProductsFailure(:final errorMessage) => Center(
-                  child: Text(
-                    errorMessage,
-                    style: context.textTheme.bodyMedium?.copyWith(
-                      color: context.theme.colorScheme.error,
-                    ),
-                  ),
+              ProductsFailure(:final errorMessage) => _buildFailure(
+                  context,
+                  errorMessage,
                 ),
             },
           ),
@@ -44,4 +36,25 @@ class AddDeviceTypeWidget extends StatelessWidget {
       ),
     );
   }
+
+  Widget _buildLoading(BuildContext context) => SizedBox(
+        width: context.screenWidth * 0.9,
+        height: context.screenHeight * 0.65,
+        child: const Center(child: CircularProgressIndicator()),
+      );
+
+  Widget _buildFailure(BuildContext context, String errorMessage) {
+    return SizedBox(
+      width: context.screenWidth * 0.9,
+      height: context.screenHeight * 0.65,
+      child: Center(
+        child: SelectableText(
+          errorMessage,
+          style: context.textTheme.bodyMedium?.copyWith(
+            color: context.theme.colorScheme.error,
+          ),
+        ),
+      ),
+    );
+  }
 }