One app menu style for every picker; links go Through me by default

- AppSelect / AppMenuButton (widgets/app_menu.dart): glass menu anchored
  to its button, check on the current item, keyboard and Esc; replaces
  the Material dropdowns in Settings, player settings, Jellyfin and the
  member menu. Material menus elsewhere get the same surface by theme.
- Link page: Through me is the main choice (you can't know which sites
  need cookies); Everyone / Server fetches it sit under "Other ways".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/desktop/lib/src/jellyfin/details_panel.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:sync_relay_core/core.dart';
 
 import '../shell/motion.dart';
+import '../widgets/app_menu.dart';
 import 'accounts.dart';
 import 'browse_scope.dart';
 import 'cards.dart' show doubleClickTime, kindIcon;
@@ -392,17 +393,13 @@ class _JellyfinDetailsPanelState extends State<JellyfinDetailsPanel> {
       children: [
         const Expanded(child: Text('Episodes', style: TextStyle(fontWeight: FontWeight.w600))),
         if (seasons.length > 1)
-          DropdownButton<String>(
-            key: const ValueKey('details-season'),
-            value: seasonId,
-            isDense: true,
-            underline: const SizedBox.shrink(),
-            borderRadius: BorderRadius.circular(10),
-            items: [
-              for (final s in seasons)
-                DropdownMenuItem(value: s.id, child: Text(s.name, overflow: TextOverflow.ellipsis)),
-            ],
-            onChanged: (id) => setState(() => _seasonId = id),
+          Flexible(
+            child: AppSelect<String?>(
+              key: const ValueKey('details-season'),
+              value: seasonId,
+              items: [for (final s in seasons) (s.id, s.name)],
+              onChanged: (id) => setState(() => _seasonId = id),
+            ),
           ),
       ],
     );

apps/desktop/lib/src/jellyfin/home_page.dart

@@ -3,6 +3,7 @@ import 'package:signals/signals_flutter.dart';
 import 'package:sync_relay_core/core.dart';
 
 import '../state/settings.dart';
+import '../widgets/app_menu.dart';
 import 'browse_scope.dart';
 import 'cards.dart';
 import 'home_rows.dart';
@@ -184,18 +185,18 @@ class _LatestRow extends StatelessWidget {
                   onPressed: () => scope.onOpen(LibraryRoute(view, sort: 'added')),
                   child: const Text('Show all'),
                 ),
-                PopupMenuButton<void>(
+                AppMenuButton<bool>(
                   key: ValueKey('latest-menu-${view.id}'),
                   tooltip: 'Row options',
-                  icon: const Icon(Icons.more_vert, size: 18),
-                  itemBuilder: (context) => [
-                    CheckedPopupMenuItem(
+                  items: () => [
+                    AppMenuItem(
                       key: const ValueKey('hide-rereleases'),
+                      value: !hide,
                       checked: hide,
-                      onTap: () => AppSettings.instance.setHideReReleases(!hide),
-                      child: const Text('Hide re-releases in Latest'),
+                      label: 'Hide re-releases in Latest',
                     ),
                   ],
+                  onSelected: AppSettings.instance.setHideReReleases,
                 ),
               ],
             ),