feat(recipes): add recipe visibility and sharing features

- Implemented functionality to set recipe visibility (public/private) with appropriate checks for user permissions.
- Added ability to share recipes with other users, including validation for existing users and permissions.
- Introduced new DTOs for setting visibility and sharing recipes.
- Updated RecipesController and RecipesService to handle new endpoints for visibility and sharing.
- Enhanced inventory preview to consider user permissions and shared recipes.
- Updated front-end to support new sharing and visibility features, including UI changes for recipe detail and admin user management.

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

@@ -3,7 +3,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
-import '../../../core/api/api_error_mapper.dart';
 import '../../../core/utils/global_error_handler.dart';
 import '../../auth/data/auth_providers.dart';
 import '../data/import_providers.dart';
@@ -23,17 +22,17 @@ class RecipeImportTab extends ConsumerStatefulWidget {
 }
 
 class _RecipeImportTabState extends ConsumerState<RecipeImportTab> {
-  // Shared state
   bool _isLoading = false;
-  String? _error;
-
-  // File mode
   PlatformFile? _pickedFile;
-
-  // URL mode
   _Method _method = _Method.file;
   final _urlCtrl = TextEditingController();
 
+  @override
+  void initState() {
+    super.initState();
+    _urlCtrl.addListener(() => setState(() {}));
+  }
+
   @override
   void dispose() {
     _urlCtrl.dispose();
@@ -59,17 +58,15 @@ class _RecipeImportTabState extends ConsumerState<RecipeImportTab> {
 
   Future<void> _submit() async {
     if (_pickedFile == null && _method == _Method.file) {
-      setState(() => _error = 'Vänligen välj en fil först');
+      showGlobalErrorDialog(context, 'Vänligen välj en fil först');
       return;
     }
 
-    setState(() {
-      _isLoading = true;
-      _error = null;
-    });
+    setState(() => _isLoading = true);
 
     try {
-      final token = await ref.read(authStateProvider.future);
+      final token = ref.read(authStateProvider).valueOrNull ??
+          await ref.read(authStateProvider.future);
       final repo = ref.read(importRepositoryProvider);
       final result = _method == _Method.file
           ? await repo.importFile(
@@ -83,7 +80,10 @@ class _RecipeImportTabState extends ConsumerState<RecipeImportTab> {
             );
 
       if (!mounted) return;
-      context.push('/recipes/create', extra: result);
+      context.push('/recipes/create', extra: {
+        'markdown': result.markdown,
+        'imageUrl': result.imageUrl,
+      });
     } catch (e) {
       showGlobalErrorDialog(context, 'Ett fel uppstod vid import: $e');
     } finally {
@@ -172,7 +172,6 @@ class _RecipeImportTabState extends ConsumerState<RecipeImportTab> {
                 prefixIcon: Icon(Icons.link),
                 border: OutlineInputBorder(),
               ),
-              onChanged: (_) => setState(() {}),
               onSubmitted: (_) {
                 if (_canSubmit) _submit();
               },
@@ -193,31 +192,6 @@ class _RecipeImportTabState extends ConsumerState<RecipeImportTab> {
             const SizedBox(height: 16),
           ],
 
-          // ── Felmeddelande ───────────────────────────────────────────────
-          if (_error != null) ...[
-            Container(
-              padding: const EdgeInsets.all(12),
-              decoration: BoxDecoration(
-                color: theme.colorScheme.errorContainer,
-                borderRadius: BorderRadius.circular(8),
-              ),
-              child: Row(
-                children: [
-                  Icon(Icons.error_outline,
-                      color: theme.colorScheme.onErrorContainer, size: 18),
-                  const SizedBox(width: 8),
-                  Expanded(
-                    child: Text(
-                      _error!,
-                      style: theme.textTheme.bodySmall?.copyWith(
-                          color: theme.colorScheme.onErrorContainer),
-                    ),
-                  ),
-                ],
-              ),
-            ),
-            const SizedBox(height: 16),
-          ],
 
           // ── Knapp ───────────────────────────────────────────────────────
           FilledButton.icon(