feat: Add functionality to move inventory items to pantry and enhance pantry management

- Implemented moveInventoryItemToPantry method in InventoryRepository to facilitate moving items from inventory to pantry.
- Enhanced InventoryScreen with a new header section providing context about the inventory.
- Added a button in SwipeableInventoryTile to move items to pantry with appropriate error handling.
- Introduced movePantryItemToInventory method in PantryRepository to support moving items back to inventory.
- Refactored PantryScreen to rename _addToInventory to _moveToInventory for clarity and updated UI to reflect changes.
- Added AdminPantryItem model to represent pantry items in the admin panel.
- Created AdminPantryPanel for managing pantry items, including moving items to inventory and listing users.
- Developed AdminPrivateProductsPanel for managing private products, allowing promotion to global products.

flutter/lib/core/api/api_error_mapper.dart

@@ -37,3 +37,56 @@ SnackBar buildCopyableErrorSnackBar(BuildContext context, String message) {
     ),
   );
 }
+
+Widget buildCopyableErrorPanel({
+  required BuildContext context,
+  required String message,
+  required VoidCallback onRetry,
+  String title = 'Ett fel uppstod',
+}) {
+  return Center(
+    child: ConstrainedBox(
+      constraints: const BoxConstraints(maxWidth: 720),
+      child: Card(
+        margin: const EdgeInsets.all(16),
+        child: Padding(
+          padding: const EdgeInsets.all(16),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Text(
+                title,
+                style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
+              ),
+              const SizedBox(height: 8),
+              SelectableText(message),
+              const SizedBox(height: 12),
+              Wrap(
+                spacing: 8,
+                runSpacing: 8,
+                children: [
+                  FilledButton.icon(
+                    onPressed: onRetry,
+                    icon: const Icon(Icons.refresh),
+                    label: Text(context.l10n.retryAction),
+                  ),
+                  OutlinedButton.icon(
+                    onPressed: () {
+                      Clipboard.setData(ClipboardData(text: message));
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(content: Text(context.l10n.errorDialogCopied)),
+                      );
+                    },
+                    icon: const Icon(Icons.copy_all),
+                    label: Text(context.l10n.errorDialogCopy),
+                  ),
+                ],
+              ),
+            ],
+          ),
+        ),
+      ),
+    ),
+  );
+}

flutter/lib/core/api/api_paths.dart

@@ -6,6 +6,8 @@ class ProductApiPaths {
   static const list = '/products';
   static const mine = '/products/mine';
   static const createPrivate = '/products/private';
+  static const privateList = '/products/private';
+  static String promotePrivate(int id) => '/products/private/$id/promote';
   static const pending = '/products/pending';
   static const aiCategorizeBulk = '/products/ai-categorize-bulk';
   static const deleted = '/products/deleted';
@@ -59,6 +61,8 @@ class InventoryApiPaths {
   static const list = '/inventory';
   static String update(int id) => '/inventory/$id';
   static String remove(int id) => '/inventory/$id';
+  static String moveToPantry(int id) => '/inventory/$id/move-to-pantry';
+  static String moveToPantryAdmin(int id) => '/inventory/admin/$id/move-to-pantry';
   static String consume(int id) => '/inventory/$id/consume';
   static String consumptionHistory(int id) => '/inventory/$id/consumption-history';
 }
@@ -77,6 +81,7 @@ class AdminInventoryApiPaths {
   }
   static String update(int id) => '/inventory/admin/$id';
   static String remove(int id) => '/inventory/admin/$id';
+  static String moveToPantry(int id) => '/inventory/admin/$id/move-to-pantry';
   static const merge = '/inventory/admin/merge';
   static String mergePreview(int sourceInventoryId, int targetInventoryId) =>
       '/inventory/admin/merge-preview?sourceInventoryId=$sourceInventoryId&targetInventoryId=$targetInventoryId';
@@ -85,6 +90,10 @@ class AdminInventoryApiPaths {
 class PantryApiPaths {
   static const list = '/pantry';
   static String remove(int id) => '/pantry/$id';
+  static String moveToInventory(int id) => '/pantry/$id/move-to-inventory';
+  static String moveToInventoryAdmin(int id) => '/pantry/admin/$id/move-to-inventory';
+  static const adminList = '/pantry/admin';
+  static String adminRemove(int id) => '/pantry/admin/$id';
 }
 
 class UserApiPaths {