feat(ai): add AI trace tracking and admin panel

- Add AiTrace model to Prisma schema with relations to User
- Implement AiTraceService with CRUD operations for AI traces
- Add new admin panel for AI traces with filtering and detail views
- Integrate trace persistence in receipt import flow
- Add API endpoints for listing and retrieving AI traces
- Update Flutter admin UI with new AI tab and navigation
- Add new domain models for AI traces and details
- Add migration for AiTrace table creation

BREAKING CHANGE: None

flutter/lib/features/admin/presentation/admin_database_panel.dart

@@ -5,7 +5,6 @@ import 'dart:async';
 import '../../../core/api/api_error_mapper.dart';
 import '../../../core/l10n/l10n.dart';
 import '../../../core/realtime/realtime_sync.dart';
-import 'admin_ai_panel.dart';
 import 'admin_aliases_panel.dart';
 import 'admin_inventory_panel.dart';
 import 'admin_pantry_panel.dart';
@@ -14,7 +13,14 @@ import 'admin_pending_products_panel.dart';
 import 'admin_products_panel.dart';
 import '../../profile/data/profile_repository.dart';
 
-enum _DatabaseTab { inventory, pantry, products, privateProducts, pending, aliases, ai }
+enum _DatabaseTab {
+  inventory,
+  pantry,
+  products,
+  privateProducts,
+  pending,
+  aliases
+}
 
 class _DatabaseTabConfig {
   final _DatabaseTab tab;
@@ -98,11 +104,6 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
           title: 'Alias',
           panel: const AdminAliasesPanel(embedded: true),
         ),
-        _DatabaseTabConfig(
-          tab: _DatabaseTab.ai,
-          title: 'AI',
-          panel: const AdminAiPanel(embedded: true),
-        ),
       ];
 
   Future<void> _refreshCategories() async {
@@ -125,7 +126,8 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
 
   @override
   Widget build(BuildContext context) {
-    final currentTab = _tabConfigs.firstWhere((config) => config.tab == _activeTab);
+    final currentTab =
+        _tabConfigs.firstWhere((config) => config.tab == _activeTab);
 
     final header = Card(
       child: Padding(
@@ -146,7 +148,8 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
                               child: ChoiceChip(
                                 label: Text(config.title),
                                 selected: _activeTab == config.tab,
-                                onSelected: (_) => setState(() => _activeTab = config.tab),
+                                onSelected: (_) =>
+                                    setState(() => _activeTab = config.tab),
                               ),
                             ),
                           )
@@ -157,7 +160,8 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
                 const SizedBox(width: 8),
                 IconButton(
                   tooltip: 'Uppdatera kategorier',
-                  onPressed: _isRefreshingCategories ? null : _refreshCategories,
+                  onPressed:
+                      _isRefreshingCategories ? null : _refreshCategories,
                   icon: _isRefreshingCategories
                       ? const SizedBox(
                           height: 16,
@@ -183,7 +187,8 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
           const SizedBox(height: 12),
           Expanded(
             child: KeyedSubtree(
-              key: ValueKey('admin-db-${_activeTab.name}-$_panelRefreshVersion'),
+              key:
+                  ValueKey('admin-db-${_activeTab.name}-$_panelRefreshVersion'),
               child: currentTab.panel,
             ),
           ),
@@ -192,4 +197,3 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
     );
   }
 }
-