Add Swedish localization for various app actions and inventory management strings

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

@@ -1,13 +1,15 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
+import '../../../core/l10n/l10n.dart';
+
 /// Visar en dialogruta med ett felmeddelande och en kopieringsknapp.
 void showErrorDialog(BuildContext context, String errorMessage) {
   showDialog(
     context: context,
     builder: (BuildContext context) {
       return AlertDialog(
-        title: const Text('Fel'),
+        title: Text(context.l10n.errorDialogTitle),
         content: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -17,17 +19,17 @@ void showErrorDialog(BuildContext context, String errorMessage) {
         ),
         actions: <Widget>[
           TextButton(
-            child: const Text('Stäng'),
+            child: Text(context.l10n.errorDialogClose),
             onPressed: () {
               Navigator.of(context).pop();
             },
           ),
           TextButton(
-            child: const Text('Kopiera'),
+            child: Text(context.l10n.errorDialogCopy),
             onPressed: () {
               Clipboard.setData(ClipboardData(text: errorMessage));
               ScaffoldMessenger.of(context).showSnackBar(
-                const SnackBar(content: Text('Felmeddelande kopierat!')),
+                SnackBar(content: Text(context.l10n.errorDialogCopied)),
               );
             },
           ),