feat: enhance error dialogs with delete functionality and improve documentation

flutter/lib/features/import/presentation/error_dialog.dart

@@ -3,7 +3,7 @@ import 'package:flutter/services.dart';
 
 import '../../../core/l10n/l10n.dart';
 
-/// Visar en dialogruta med ett felmeddelande och en kopieringsknapp.
+/// Visar en dialogruta med ett felmeddelande och knappar för kopiera och ta bort.
 void showErrorDialog(BuildContext context, String errorMessage) {
   showDialog(
     context: context,
@@ -28,6 +28,7 @@ void showErrorDialog(BuildContext context, String errorMessage) {
             child: Text(context.l10n.errorDialogCopy),
             onPressed: () {
               Clipboard.setData(ClipboardData(text: errorMessage));
+              Navigator.of(context).pop();
               ScaffoldMessenger.of(context).showSnackBar(
                 SnackBar(content: Text(context.l10n.errorDialogCopied)),
               );

flutter/lib/features/import/presentation/receipt_import_tab.dart

@@ -460,6 +460,44 @@ class _ReceiptImportTabState extends ConsumerState<ReceiptImportTab> {
     );
   }
 
+  void _deleteItem(int index) {
+    final items = _items;
+    if (items == null || index < 0 || index >= items.length) return;
+
+    // Ta bort raden från items
+    final remainingItems = <ParsedReceiptItem>[...items];
+    remainingItems.removeAt(index);
+
+    // Re-index edits och selected i en enda pass
+    final remainingEdits = <int, ItemEdit>{};
+    final remainingSelected = <int, bool>{};
+    var newIndex = 0;
+    
+    for (var oldIndex = 0; oldIndex < items.length; oldIndex++) {
+      if (oldIndex != index) {
+        if (_edits.containsKey(oldIndex)) {
+          remainingEdits[newIndex] = _edits[oldIndex]!;
+        }
+        if (_selected[oldIndex] == true) {
+          remainingSelected[newIndex] = true;
+        }
+        newIndex++;
+      }
+    }
+
+    final notifier = ref.read(receiptImportSessionProvider.notifier);
+    if (remainingItems.isEmpty) {
+      notifier.clear();
+    } else {
+      notifier.setImportedResult(
+        items: remainingItems,
+        edits: remainingEdits,
+        selected: remainingSelected,
+      );
+    }
+    setState(() {});
+  }
+
   Future<void> _addSelected() async {
     final items = _items;
     if (items == null) return;
@@ -572,9 +610,36 @@ class _ReceiptImportTabState extends ConsumerState<ReceiptImportTab> {
         SnackBar(content: Text(parts.join(', ') + '.')),
       );
 
-      // Avmarkera sparade rader och uppdatera inventariet
+      // Ta bort de tillagda raderna från listan
+      final addedIndexSet = toAdd.toSet();
+      final remainingItems = <ParsedReceiptItem>[];
+      final remainingEdits = <int, ItemEdit>{};
+      final remainingSelected = <int, bool>{};
+      
+      var newIndex = 0;
+      for (var oldIndex = 0; oldIndex < items.length; oldIndex++) {
+        if (!addedIndexSet.contains(oldIndex)) {
+          remainingItems.add(items[oldIndex]);
+          if (_edits.containsKey(oldIndex)) {
+            remainingEdits[newIndex] = _edits[oldIndex]!;
+          }
+          if (_selected[oldIndex] == true) {
+            remainingSelected[newIndex] = true;
+          }
+          newIndex++;
+        }
+      }
+      
       final notifier = ref.read(receiptImportSessionProvider.notifier);
-      notifier.setSelectedForIndexes(toAdd, false);
+      if (remainingItems.isEmpty) {
+        notifier.clear();
+      } else {
+        notifier.setImportedResult(
+          items: remainingItems,
+          edits: remainingEdits,
+          selected: remainingSelected,
+        );
+      }
       setState(() {});
       await _loadInventory();
     } catch (e) {
@@ -779,6 +844,7 @@ class _ReceiptImportTabState extends ConsumerState<ReceiptImportTab> {
                       i,
                       initialEntryMode: ImportProductEntryMode.create,
                     ),
+                    onDeleteRequested: () => _deleteItem(i),
                     matchedViaBadgeBuilder: _buildMatchedViaBadge,
                   );
                 },
@@ -811,6 +877,7 @@ class _ReceiptImportResultRow extends ConsumerWidget {
   final VoidCallback onEditRequested;
   final VoidCallback onSelectExistingRequested;
   final VoidCallback onCreateRequested;
+  final VoidCallback onDeleteRequested;
   final Widget Function(ParsedReceiptItem item, ThemeData theme)
       matchedViaBadgeBuilder;
 
@@ -824,6 +891,7 @@ class _ReceiptImportResultRow extends ConsumerWidget {
     required this.onEditRequested,
     required this.onSelectExistingRequested,
     required this.onCreateRequested,
+    required this.onDeleteRequested,
     required this.matchedViaBadgeBuilder,
   });
 
@@ -1019,14 +1087,29 @@ class _ReceiptImportResultRow extends ConsumerWidget {
             ],
           ],
         ),
-        trailing: Icon(
-          hasProduct
-              ? Icons.check_circle
-              : (isSuggested ? Icons.help_outline : Icons.error_outline),
-          color: hasProduct
-              ? Colors.green
-              : (isSuggested ? Colors.orange : theme.colorScheme.tertiary),
-          size: 20,
+        trailing: SizedBox(
+          width: 80,
+          child: Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Icon(
+                hasProduct
+                    ? Icons.check_circle
+                    : (isSuggested ? Icons.help_outline : Icons.error_outline),
+                color: hasProduct
+                    ? Colors.green
+                    : (isSuggested ? Colors.orange : theme.colorScheme.tertiary),
+                size: 20,
+              ),
+              IconButton(
+                icon: Icon(Icons.delete_outline, size: 18, color: theme.colorScheme.error),
+                onPressed: onDeleteRequested,
+                tooltip: 'Ta bort rad',
+                constraints: const BoxConstraints(minWidth: 40, minHeight: 40),
+                padding: const EdgeInsets.all(4),
+              ),
+            ],
+          ),
         ),
         onTap: onEditRequested,
       ),