Fix error handling in various admin and inventory screens

- Updated error handling in AdminAliasesPanel, AdminDatabasePanel, AdminPendingProductsPanel, and AdminProductsPanel to ensure consistent snackbar display without extra parentheses.
- Refined error handling in ConsumeInventoryScreen, CreateInventoryScreen, InventoryDetailScreen, InventoryEditScreen, and SwipeableInventoryTile to maintain consistent snackbar formatting.
- Improved error handling in MealPlanScreen, PantryScreen, ProfileScreen, and RecipeDetailScreen to ensure proper user feedback on errors.

flutter/lib/features/admin/presentation/admin_database_panel.dart

@@ -33,7 +33,7 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context))),
+        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
       );
     } finally {
       if (mounted) setState(() => _isRefreshingCategories = false);