fix：按照shadcn_ui对着demo_shadcn对齐

lib/features/institutions/institutions_page.dart

@@ -1,10 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:shadcn_ui/shadcn_ui.dart';
 
 import '../../data/api/report_data_source.dart';
 import '../../data/content_providers.dart';
 import '../../routing/app_routes.dart';
-import '../../theme/wise_tokens.dart';
+import '../../theme/yanting_tokens.dart';
 import '../../widgets/institution_card.dart';
 import '../../widgets/page_header.dart';
 import '../../widgets/states.dart';
@@ -35,20 +36,23 @@ class InstitutionsPage extends HookConsumerWidget {
         }
         return ListView(
           padding: const EdgeInsets.fromLTRB(
-            WiseSpacing.x4,
+            YantingSpacing.screenX,
             4,
-            WiseSpacing.x4,
+            YantingSpacing.screenX,
             16,
           ),
           children: [
             const PageHeader(title: '机构', subtitle: '可获取研报的机构'),
+            const SizedBox(height: YantingSpacing.x3),
+            const ShadSeparator.horizontal(),
+            const SizedBox(height: YantingSpacing.x3),
             for (final item in sorted) ...[
               InstitutionCard(
                 institution: item,
                 onTap: () =>
                     openInstitutionDetail(context, dataSource, item.id),
               ),
-              const SizedBox(height: WiseSpacing.x3),
+              const SizedBox(height: YantingSpacing.x3),
             ],
           ],
         );