feat: implement update functionality for receipt aliases and add corresponding tests

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

@@ -26,6 +26,7 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
 
   final TextEditingController _aliasController = TextEditingController();
   int? _selectedProductId;
+  int? _editingAliasId;
 
   @override
   void initState() {
@@ -79,18 +80,32 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
 
     setState(() => _isSaving = true);
     try {
-      await ref.read(adminRepositoryProvider).upsertReceiptAlias(
-            receiptName: rawAlias,
-            productId: productId,
-        isGlobal: true,
-          );
+      final repo = ref.read(adminRepositoryProvider);
+      final isEditing = _editingAliasId != null;
+      if (isEditing) {
+        await repo.updateReceiptAlias(
+          _editingAliasId!,
+          receiptName: rawAlias,
+          productId: productId,
+        );
+      } else {
+        await repo.upsertReceiptAlias(
+          receiptName: rawAlias,
+          productId: productId,
+          isGlobal: true,
+        );
+      }
+
       if (!mounted) return;
       _aliasController.clear();
-      setState(() => _selectedProductId = null);
+      setState(() {
+        _selectedProductId = null;
+        _editingAliasId = null;
+      });
       await _load();
       if (!mounted) return;
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('Alias sparad.')),
+        SnackBar(content: Text(isEditing ? 'Alias uppdaterat.' : 'Alias sparad.')),
       );
     } catch (e) {
       if (!mounted) return;
@@ -102,6 +117,29 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
     }
   }
 
+  void _startEditAlias(ReceiptAlias alias) {
+    if (!alias.isGlobal) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Privata alias redigeras av respektive användare.')),
+      );
+      return;
+    }
+
+    setState(() {
+      _editingAliasId = alias.id;
+      _aliasController.text = alias.receiptName;
+      _selectedProductId = alias.productId;
+    });
+  }
+
+  void _cancelEditAlias() {
+    setState(() {
+      _editingAliasId = null;
+      _aliasController.clear();
+      _selectedProductId = null;
+    });
+  }
+
   Future<void> _removeAlias(ReceiptAlias alias) async {
     final confirmed = await showDialog<bool>(
       context: context,
@@ -202,11 +240,23 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
               ),
             ],
           ),
-          trailing: IconButton(
-            onPressed: () => _removeAlias(alias),
-            icon: const Icon(Icons.delete_outline),
-            tooltip: 'Ta bort alias',
-            color: Theme.of(context).colorScheme.error,
+          trailing: Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              IconButton(
+                onPressed: () => _startEditAlias(alias),
+                icon: const Icon(Icons.edit_outlined),
+                tooltip: alias.isGlobal
+                    ? 'Redigera alias'
+                    : 'Privata alias redigeras av användaren',
+              ),
+              IconButton(
+                onPressed: () => _removeAlias(alias),
+                icon: const Icon(Icons.delete_outline),
+                tooltip: 'Ta bort alias',
+                color: Theme.of(context).colorScheme.error,
+              ),
+            ],
           ),
         ),
       );
@@ -256,6 +306,7 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
             const SizedBox(width: 8),
             Expanded(
               child: DropdownButtonFormField<int>(
+                key: ValueKey<int?>(_selectedProductId),
                 initialValue: _selectedProductId,
                 decoration: const InputDecoration(
                   labelText: 'Produkt',
@@ -275,6 +326,13 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
               ),
             ),
             const SizedBox(width: 8),
+            if (_editingAliasId != null) ...[
+              OutlinedButton(
+                onPressed: _isSaving ? null : _cancelEditAlias,
+                child: const Text('Avbryt'),
+              ),
+              const SizedBox(width: 8),
+            ],
             FilledButton.icon(
               onPressed: _isSaving ? null : _upsertAlias,
               icon: _isSaving
@@ -283,8 +341,8 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
                       height: 14,
                       child: CircularProgressIndicator(strokeWidth: 2),
                     )
-                  : const Icon(Icons.save_outlined),
-              label: const Text('Spara'),
+                  : Icon(_editingAliasId != null ? Icons.edit_outlined : Icons.save_outlined),
+              label: Text(_editingAliasId != null ? 'Uppdatera' : 'Spara'),
             ),
           ],
         ),