feat(flyer-import): add detailed product signals and display names

- Added `signals` and `displayNameDetailed` fields to FlyerItem model in Prisma schema
- Introduced `FlyerImportSignals` type with origin countries, labels, quality flags, variant, and packaging
- Added `displayNameDetailed` field to FlyerImportItem DTO and Flutter model
- Implemented utility functions for signal extraction and display name building
- Updated flyer import service to persist and return signals/category data
- Enhanced Flutter UI to display detailed product information including badges for signals
- Added new test coverage for signals persistence and display name generation
- Added new import-common module for shared import utilities
- Created database migration for new fields
- Added Kilo plan for feature development

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

@@ -501,6 +501,40 @@ class _FlyerImportTabState extends ConsumerState<FlyerImportTab> {
     );
   }
 
+  Widget _buildMetadataBadges(FlyerImportItem item, ThemeData theme) {
+    final values = <String>[
+      ...(item.signals?.originCountries ?? const <String>[]),
+      ...(item.signals?.labels ?? const <String>[]),
+    ];
+    if (values.isEmpty) return const SizedBox.shrink();
+
+    return Wrap(
+      spacing: 6,
+      runSpacing: 6,
+      children: values
+          .map(
+            (value) => Container(
+              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+              decoration: BoxDecoration(
+                color: theme.colorScheme.primary.withValues(alpha: 0.08),
+                borderRadius: BorderRadius.circular(999),
+                border: Border.all(
+                  color: theme.colorScheme.primary.withValues(alpha: 0.25),
+                ),
+              ),
+              child: Text(
+                value,
+                style: theme.textTheme.labelSmall?.copyWith(
+                  color: theme.colorScheme.primary,
+                  fontWeight: FontWeight.w600,
+                ),
+              ),
+            ),
+          )
+          .toList(),
+    );
+  }
+
   Future<void> _copyText(String value, String label) async {
     await Clipboard.setData(ClipboardData(text: value));
     if (!mounted) return;
@@ -744,7 +778,7 @@ class _FlyerImportTabState extends ConsumerState<FlyerImportTab> {
                 },
                 title: Row(
                   children: [
-                    Expanded(child: Text(item.rawName)),
+                    Expanded(child: Text(item.displayNameDetailed ?? item.rawName)),
                     IconButton(
                       tooltip: 'Redigera',
                       visualDensity: VisualDensity.compact,
@@ -765,6 +799,10 @@ class _FlyerImportTabState extends ConsumerState<FlyerImportTab> {
                   crossAxisAlignment: CrossAxisAlignment.start,
                   children: [
                     if (priceText.isNotEmpty) Text('Pris: $priceText'),
+                    if (item.isBundle && item.bundleItems.isNotEmpty)
+                      Text('Paketinnehåll: ${item.bundleItems.join(' + ')}'),
+                    if (item.brand != null && item.brand!.trim().isNotEmpty)
+                      Text('Varumärke: ${item.brand}'),
                     if ((item.category ?? '').trim().isNotEmpty)
                       Text('Kategori: ${item.category}'),
                     if (comparisonText.isNotEmpty)
@@ -778,6 +816,11 @@ class _FlyerImportTabState extends ConsumerState<FlyerImportTab> {
                         ),
                       ),
                     if (sanitizedOfferText.isNotEmpty) Text(sanitizedOfferText),
+                    if ((item.signals?.originCountries.isNotEmpty ?? false) ||
+                        (item.signals?.labels.isNotEmpty ?? false)) ...[
+                      const SizedBox(height: 6),
+                      _buildMetadataBadges(item, theme),
+                    ],
                     if (item.matchedProductName != null)
                       Text('Match: ${item.matchedProductName}'),
                     if (detailedReasons.isNotEmpty) ...[