feat: add canonical name endpoint and update product renaming functionality in admin panel

flutter/lib/features/admin/data/admin_repository.dart

@@ -191,6 +191,12 @@ class AdminRepository {
   Future<void> restoreProduct(int productId) =>
       _postVoid(ProductApiPaths.restore(productId));
 
+  Future<void> updateCanonicalName(int productId, String canonicalName) =>
+      _patchVoid(
+        ProductApiPaths.canonicalName(productId),
+        {'canonicalName': canonicalName.trim()},
+      );
+
   /// Skapar en ny aktiv produkt (kräver admin). Returnerar `{id, name, categoryId?}`.
   Future<Map<String, dynamic>> createProduct(String name, {int? categoryId}) =>
       _post<Map<String, dynamic>>(

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

@@ -42,6 +42,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
   final Set<int> _selectedIds = <int>{};
   final Map<int, String> _rowCategoryValue = <int, String>{};
   final Set<int> _rowCategorySaving = <int>{};
+  List<({String value, String label})> _cachedCategoryOptions = [];
 
   @override
   void initState() {
@@ -65,6 +66,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
       setState(() {
         _products = results[0] as List<AdminProduct>;
         _categories = results[1] as List<AdminCategoryNode>;
+        _cachedCategoryOptions = _flattenCategories(_categories);
         _rowCategoryValue.clear();
         _rowCategorySaving.clear();
       });
@@ -76,22 +78,14 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     }
   }
 
-  String _sortLabel(_ProductSort sort) {
-    switch (sort) {
-      case _ProductSort.newest:
-        return context.l10n.adminSortNewest;
-      case _ProductSort.oldest:
-        return context.l10n.adminSortOldest;
-      case _ProductSort.nameAsc:
-        return context.l10n.adminSortNameAsc;
-      case _ProductSort.nameDesc:
-        return context.l10n.adminSortNameDesc;
-      case _ProductSort.categoryAsc:
-        return context.l10n.adminSortCategoryAsc;
-      case _ProductSort.categoryDesc:
-        return context.l10n.adminSortCategoryDesc;
-    }
-  }
+  String _sortLabel(_ProductSort sort) => switch (sort) {
+    _ProductSort.newest      => context.l10n.adminSortNewest,
+    _ProductSort.oldest      => context.l10n.adminSortOldest,
+    _ProductSort.nameAsc     => context.l10n.adminSortNameAsc,
+    _ProductSort.nameDesc    => context.l10n.adminSortNameDesc,
+    _ProductSort.categoryAsc => context.l10n.adminSortCategoryAsc,
+    _ProductSort.categoryDesc => context.l10n.adminSortCategoryDesc,
+  };
 
   List<({String value, String label})> _flattenCategories(
     List<AdminCategoryNode> nodes, [
@@ -132,7 +126,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
       );
     } finally {
       if (mounted) setState(() => _isApplying = false);
@@ -181,7 +175,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
       );
     } finally {
       if (mounted) setState(() => _isAiRunning = false);
@@ -321,7 +315,70 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
+      );
+    }
+  }
+
+  Future<void> _renameProduct(AdminProduct product) async {
+    final controller = TextEditingController(
+      text: product.canonicalName?.isNotEmpty == true
+          ? product.canonicalName
+          : product.name,
+    );
+    final newName = await showDialog<String>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: const Text('Byt namn på produkt'),
+        content: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text('Produkt-ID: ${product.id}'),
+            const SizedBox(height: 12),
+            TextField(
+              controller: controller,
+              autofocus: true,
+              decoration: const InputDecoration(
+                labelText: 'Kanoniskt namn',
+                border: OutlineInputBorder(),
+              ),
+              onSubmitted: (value) {
+                if (value.trim().isNotEmpty) Navigator.pop(dialogContext, value.trim());
+              },
+            ),
+          ],
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext),
+            child: Text(context.l10n.cancelAction),
+          ),
+          FilledButton(
+            onPressed: () {
+              final value = controller.text.trim();
+              if (value.isNotEmpty) Navigator.pop(dialogContext, value);
+            },
+            child: const Text('Spara'),
+          ),
+        ],
+      ),
+    );
+    controller.dispose();
+    if (newName == null || !mounted) return;
+
+    try {
+      await ref.read(adminRepositoryProvider).updateCanonicalName(product.id, newName);
+      if (!mounted) return;
+      await _load();
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('Namn uppdaterat till "$newName"')),
+      );
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        _showError(e);
       );
     }
   }
@@ -358,7 +415,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
       );
     }
   }
@@ -367,9 +424,8 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     if (_selectedIds.isEmpty || !_showDeletedOnly || _isApplying) return;
     setState(() => _isApplying = true);
     try {
-      for (final id in _selectedIds.toList()) {
-        await ref.read(adminRepositoryProvider).restoreProduct(id);
-      }
+      final repo = ref.read(adminRepositoryProvider);
+      await Future.wait(_selectedIds.map(repo.restoreProduct));
       if (!mounted) return;
       setState(() => _selectedIds.clear());
       await _load();
@@ -380,7 +436,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
       );
     } finally {
       if (mounted) setState(() => _isApplying = false);
@@ -399,7 +455,7 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
       );
     }
   }
@@ -435,22 +491,30 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
     } catch (e) {
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+        _showError(e);
       );
       setState(() => _rowCategorySaving.remove(product.id));
     }
   }
 
   String _nameForId(int id) {
-    final match = _products.where((p) => p.id == id).toList();
-    if (match.isEmpty) return '#$id';
-    return match.first.displayName;
+    for (final p in _products) {
+      if (p.id == id) return p.displayName;
+    }
+    return '#$id';
+  }
+
+  void _showError(Object e) {
+    if (!mounted) return;
+    ScaffoldMessenger.of(context).showSnackBar(
+      _showError(e);
+    );
   }
 
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    final categoryOptions = _flattenCategories(_categories);
+    final categoryOptions = _cachedCategoryOptions;
     final filtered = _products.where((product) {
       if (!_showDeletedOnly && _showUncategorizedOnly && product.categoryId != null) {
         return false;
@@ -709,6 +773,13 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
                         else
                           const SizedBox.shrink(),
                         const SizedBox(width: 8),
+                        if (!_showDeletedOnly)
+                          TextButton.icon(
+                            onPressed: () => _renameProduct(product),
+                            icon: const Icon(Icons.drive_file_rename_outline),
+                            label: const Text('Byt namn'),
+                          ),
+                        const SizedBox(width: 4),
                         if (_showDeletedOnly)
                           TextButton.icon(
                             onPressed: () => _restoreProduct(product),