feat: Enhance admin panel navigation and UI by implementing tab management and improving layout structure

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

@@ -1,6 +1,5 @@
 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/l10n/l10n.dart';
@@ -18,14 +17,12 @@ enum _DatabaseTab { inventory, pantry, products, privateProducts, pending, alias
 class _DatabaseTabConfig {
   final _DatabaseTab tab;
   final String title;
-  final String summary;
-  final Widget Function(BuildContext context) buildPanel;
+  final Widget panel;
 
   const _DatabaseTabConfig({
     required this.tab,
     required this.title,
-    required this.summary,
-    required this.buildPanel,
+    required this.panel,
   });
 }
 
@@ -46,44 +43,37 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
         _DatabaseTabConfig(
           tab: _DatabaseTab.inventory,
           title: context.l10n.profileInventoryTab,
-          summary: 'Granska, filtrera och redigera inventory-poster. Välj användare för att arbeta på en specifik ägares data.',
-          buildPanel: (_) => const AdminInventoryPanel(embedded: true),
+          panel: const AdminInventoryPanel(embedded: true),
         ),
         _DatabaseTabConfig(
           tab: _DatabaseTab.pantry,
           title: context.l10n.profilePantryTab,
-          summary: 'Granska och redigera användarnas baslager. Flytta poster till inventarie eller ta bort dem vid behov.',
-          buildPanel: (_) => const AdminPantryPanel(embedded: true),
+          panel: const AdminPantryPanel(embedded: true),
         ),
         _DatabaseTabConfig(
           tab: _DatabaseTab.products,
           title: context.l10n.profileProductsTab,
-          summary: 'Hantera globala produkter: kategorisering, restaurering, merge och AI-stöd.',
-          buildPanel: (_) => const AdminProductsPanel(embedded: true),
+          panel: const AdminProductsPanel(embedded: true),
         ),
         _DatabaseTabConfig(
           tab: _DatabaseTab.privateProducts,
           title: 'Privata produkter',
-          summary: 'Promotera privata produkter till den globala produkt-tabellen.',
-          buildPanel: (_) => const AdminPrivateProductsPanel(embedded: true),
+          panel: const AdminPrivateProductsPanel(embedded: true),
         ),
         _DatabaseTabConfig(
           tab: _DatabaseTab.pending,
           title: context.l10n.profilePendingTab,
-          summary: 'Godkänn eller avslå nya produkter som föreslagits av användare.',
-          buildPanel: (_) => const AdminPendingProductsPanel(embedded: true),
+          panel: const AdminPendingProductsPanel(embedded: true),
         ),
         _DatabaseTabConfig(
           tab: _DatabaseTab.aliases,
           title: 'Alias',
-          summary: 'Hantera globala alias som används i receipt-importens första matchningssteg.',
-          buildPanel: (_) => const AdminAliasesPanel(embedded: true),
+          panel: const AdminAliasesPanel(embedded: true),
         ),
         _DatabaseTabConfig(
           tab: _DatabaseTab.ai,
           title: 'AI',
-          summary: 'Se vilka AI-modeller som används och hur de är exponerade i systemet.',
-          buildPanel: (_) => const AdminAiPanel(embedded: true),
+          panel: const AdminAiPanel(embedded: true),
         ),
       ];
 
@@ -105,33 +95,6 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
     }
   }
 
-  Widget _panelShell({
-    required String title,
-    required String description,
-    required Widget child,
-  }) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        Card(
-          child: Padding(
-            padding: const EdgeInsets.all(16),
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Text(title, style: Theme.of(context).textTheme.titleMedium),
-                const SizedBox(height: 8),
-                Text(description),
-              ],
-            ),
-          ),
-        ),
-        const SizedBox(height: 12),
-        Expanded(child: child),
-      ],
-    );
-  }
-
   @override
   Widget build(BuildContext context) {
     final currentTab = _tabConfigs.firstWhere((config) => config.tab == _activeTab);
@@ -178,10 +141,6 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
               ],
             ),
             const SizedBox(height: 8),
-            Text(
-              currentTab.summary,
-              style: Theme.of(context).textTheme.bodySmall,
-            ),
           ],
         ),
       ),
@@ -192,9 +151,9 @@ class _AdminDatabasePanelState extends ConsumerState<AdminDatabasePanel> {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          Expanded(flex: 1, child: header),
+          header,
           const SizedBox(height: 12),
-          Expanded(flex: 6, child: _panelShell(title: currentTab.title, description: currentTab.summary, child: currentTab.buildPanel(context))),
+          Expanded(child: currentTab.panel),
         ],
       ),
     );