chore(import): improve error handling and add flyer integration

- Replace BadRequestException with UnauthorizedException for authentication failures in flyer-import and flyer-selection controllers
- Add bulk selection endpoint in FlyerSelectionController for creating multiple selections in one request
- Update FlyerSelectionModule to include new FlyerSelectionMatcherService and FlyerSelectionSyncController
- Extend FlyerSelectionService with createMany method for bulk operations
- Add new DTOs for bulk selection and receipt matching functionality
- Update ReceiptImportService to accept FlyerSelectionService dependency and track successful rows
- Extend SaveReceiptResponse with flyerAutoSync field for receipt-to-flyer matching results
- Add new API paths for flyer import and selection endpoints
- Update Flutter UI to include Flyer import tab and adjust tab controller length
- Add new domain models and repository methods for flyer import functionality
- Update test files to include new FlyerSelectionService dependency
- Modify .kilo plan documentation to reflect current system architecture

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

@@ -0,0 +1,196 @@
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../auth/data/auth_providers.dart';
+import '../data/import_providers.dart';
+import '../domain/flyer_import_item.dart';
+import '../domain/flyer_import_result.dart';
+import 'error_dialog.dart';
+
+class FlyerImportTab extends ConsumerStatefulWidget {
+  const FlyerImportTab({super.key});
+
+  @override
+  ConsumerState<FlyerImportTab> createState() => _FlyerImportTabState();
+}
+
+class _FlyerImportTabState extends ConsumerState<FlyerImportTab> {
+  bool _isLoading = false;
+  bool _isSaving = false;
+  PlatformFile? _pickedFile;
+  FlyerImportResult? _result;
+  final Map<int, bool> _selected = {};
+
+  Future<void> _pickFile() async {
+    final result = await FilePicker.pickFiles(
+      type: FileType.custom,
+      allowedExtensions: ['pdf', 'txt'],
+      withData: true,
+    );
+    if (result == null || result.files.isEmpty) return;
+    setState(() => _pickedFile = result.files.first);
+  }
+
+  Future<void> _parseFlyer() async {
+    final file = _pickedFile;
+    if (file?.bytes == null) return;
+
+    setState(() => _isLoading = true);
+    try {
+      final token = await ref.read(authStateProvider.future);
+      final repo = ref.read(importRepositoryProvider);
+      final parsed = await repo.importFlyerFile(
+        bytes: file!.bytes!,
+        filename: file.name,
+        token: token,
+      );
+
+      if (!mounted) return;
+      final selected = <int, bool>{};
+      for (var i = 0; i < parsed.items.length; i++) {
+        selected[i] = parsed.items[i].matchedProductId != null;
+      }
+      setState(() {
+        _result = parsed;
+        _selected
+          ..clear()
+          ..addAll(selected);
+      });
+    } catch (e) {
+      if (mounted) showErrorDialog(context, 'Flyerimport misslyckades: $e');
+    } finally {
+      if (mounted) setState(() => _isLoading = false);
+    }
+  }
+
+  Future<void> _planSelected() async {
+    final result = _result;
+    if (result?.sessionId == null) return;
+
+    final itemsToSave = <Map<String, dynamic>>[];
+    for (var i = 0; i < result!.items.length; i++) {
+      final item = result.items[i];
+      final isSelected = _selected[i] == true;
+      if (!isSelected || item.flyerItemId == null) continue;
+      itemsToSave.add({
+        'itemId': item.flyerItemId,
+        'plannedQuantity': 1,
+        'plannedUnit': item.priceUnit,
+        'priority': 'normal',
+      });
+    }
+
+    if (itemsToSave.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Markera minst en rad att planera.')),
+      );
+      return;
+    }
+
+    setState(() => _isSaving = true);
+    try {
+      final token = await ref.read(authStateProvider.future);
+      final repo = ref.read(importRepositoryProvider);
+      final saved = await repo.createFlyerSelectionsBulk(
+        sessionId: result.sessionId!,
+        items: itemsToSave,
+        token: token,
+      );
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('${saved.length} varor planerade.')),
+      );
+    } catch (e) {
+      if (mounted) showErrorDialog(context, 'Kunde inte planera varor: $e');
+    } finally {
+      if (mounted) setState(() => _isSaving = false);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final items = _result?.items ?? const <FlyerImportItem>[];
+    final selectedCount = _selected.values.where((value) => value).length;
+
+    return SingleChildScrollView(
+      padding: const EdgeInsets.all(16),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(
+            'Ladda upp flyer (PDF/txt), granska rader och planera inköp med ett klick.',
+            style: theme.textTheme.bodyMedium,
+          ),
+          const SizedBox(height: 16),
+          OutlinedButton.icon(
+            onPressed: _isLoading ? null : _pickFile,
+            icon: const Icon(Icons.attach_file),
+            label: Text(_pickedFile?.name ?? 'Välj flyerfil'),
+          ),
+          const SizedBox(height: 12),
+          FilledButton.icon(
+            onPressed: (!_isLoading && _pickedFile?.bytes != null) ? _parseFlyer : null,
+            icon: const Icon(Icons.auto_awesome),
+            label: const Text('Importera flyer'),
+          ),
+          if (_isLoading) ...[
+            const SizedBox(height: 12),
+            const LinearProgressIndicator(),
+          ],
+          if (items.isNotEmpty) ...[
+            const SizedBox(height: 20),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Text('${items.length} rader hittades', style: theme.textTheme.titleSmall),
+                TextButton(
+                  onPressed: () {
+                    final target = selectedCount < items.length;
+                    setState(() {
+                      for (var i = 0; i < items.length; i++) {
+                        _selected[i] = target;
+                      }
+                    });
+                  },
+                  child: Text(selectedCount < items.length ? 'Välj alla' : 'Avmarkera alla'),
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
+            ...items.asMap().entries.map((entry) {
+              final index = entry.key;
+              final item = entry.value;
+              return CheckboxListTile(
+                value: _selected[index] ?? false,
+                onChanged: (value) => setState(() => _selected[index] = value ?? false),
+                title: Text(item.rawName),
+                subtitle: Text([
+                  if (item.offerText != null && item.offerText!.isNotEmpty) item.offerText!,
+                  if (item.matchedProductName != null) 'Match: ${item.matchedProductName}',
+                ].join(' · ')),
+                controlAffinity: ListTileControlAffinity.leading,
+              );
+            }),
+            const SizedBox(height: 8),
+            SizedBox(
+              width: double.infinity,
+              child: FilledButton.icon(
+                onPressed: (_isSaving || selectedCount == 0) ? null : _planSelected,
+                icon: _isSaving
+                    ? const SizedBox(
+                        width: 16,
+                        height: 16,
+                        child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
+                      )
+                    : const Icon(Icons.playlist_add_check),
+                label: Text('Planera $selectedCount markerade'),
+              ),
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+}

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

@@ -1,9 +1,10 @@
 import 'package:flutter/material.dart';
 
-import 'recipe_import_tab.dart';
-import 'receipt_import_tab.dart';
+import 'flyer_import_tab.dart';
+import 'recipe_import_tab.dart';
+import 'receipt_import_tab.dart';
 
-/// Main import screen with tabs: Recept | Kvitto.
+/// Main import screen with tabs: Recept | Kvitto | Flyer.
 ///
 /// Fas 6a: Recept-fliken är implementerad.
 /// Fas 6b: Kvitto-fliken läggs till i ett senare steg.
@@ -18,10 +19,11 @@ class _ImportScreenState extends State<ImportScreen> {
   @override
   Widget build(BuildContext context) {
     return const TabBarView(
-      children: [
-        RecipeImportTab(),
-        ReceiptImportTab(),
-      ],
-    );
-  }
-}
+      children: [
+        RecipeImportTab(),
+        ReceiptImportTab(),
+        FlyerImportTab(),
+      ],
+    );
+  }
+}

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

@@ -708,8 +708,9 @@ class _ReceiptImportTabState extends ConsumerState<ReceiptImportTab> {
       final pantryAdded = response['pantryAdded'] as int? ?? 0;
       final pantrySkipped = response['pantrySkipped'] as int? ?? 0;
       final aliasesLearned = response['aliasesLearned'] as int? ?? 0;
-      final unitMappingsLearned = response['unitMappingsLearned'] as int? ?? 0;
-      final errors = response['errors'] as List? ?? [];
+      final unitMappingsLearned = response['unitMappingsLearned'] as int? ?? 0;
+      final flyerAutoSync = response['flyerAutoSync'] as Map<String, dynamic>?;
+      final errors = response['errors'] as List? ?? [];
 
       final parts = <String>[
         if (created > 0) '$created ny${created == 1 ? '' : 'a'} i inventarie',
@@ -717,8 +718,12 @@ class _ReceiptImportTabState extends ConsumerState<ReceiptImportTab> {
         if (pantryAdded > 0) '$pantryAdded tillagd${pantryAdded == 1 ? '' : 'a'} i baslager',
         if (pantrySkipped > 0) '$pantrySkipped fanns redan i baslager',
         if (aliasesLearned > 0) '$aliasesLearned alias inlärda',
-        if (unitMappingsLearned > 0) '$unitMappingsLearned enhetsmappningar inlärda',
-      ];
+        if (unitMappingsLearned > 0) '$unitMappingsLearned enhetsmappningar inlärda',
+        if ((flyerAutoSync?['bought'] as int? ?? 0) > 0)
+          '${flyerAutoSync?['bought']} planerade flyer-varor markerade som köpta',
+        if ((flyerAutoSync?['ambiguous'] as int? ?? 0) > 0)
+          '${flyerAutoSync?['ambiguous']} flyer-matchningar kräver kontroll',
+      ];
 
       if (errors.isNotEmpty) {
         final errorParts = <String>[];