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/pantry/presentation/pantry_screen.dart

@@ -166,7 +166,7 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
       _logger.severe('Failed to add item to inventory: $error');
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(error, context))),
+        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(error, context)),
       );
     }
   }
@@ -185,7 +185,7 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
       _logger.severe('Failed to add pantry item: $error');
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(error, context))),
+        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(error, context)),
       );
     } finally {
       if (mounted) setState(() => _isSubmitting = false);
@@ -221,7 +221,7 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
       _logger.severe('Failed to remove pantry item: $error');
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(error, context))),
+        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(error, context)),
       );
     }
   }