Add proxies sort

lib/domain/singbox/proxy_type.dart

@@ -28,4 +28,6 @@ enum ProxyType {
   String get key => name;
 
   static List<ProxyType> groupValues = [selector, urltest];
+
+  bool get isGroup => ProxyType.groupValues.contains(this);
 }

lib/features/proxies/notifier/proxies_notifier.dart

@@ -1,31 +1,86 @@
 import 'dart:async';
 
+import 'package:combine/combine.dart';
+import 'package:dartx/dartx.dart';
+import 'package:hiddify/core/prefs/prefs.dart';
 import 'package:hiddify/data/data_providers.dart';
 import 'package:hiddify/domain/core_service_failure.dart';
 import 'package:hiddify/domain/singbox/singbox.dart';
 import 'package:hiddify/features/common/connectivity/connectivity_controller.dart';
+import 'package:hiddify/utils/pref_notifier.dart';
 import 'package:hiddify/utils/utils.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
 part 'proxies_notifier.g.dart';
 
-@Riverpod(keepAlive: true)
+enum ProxiesSort {
+  unsorted,
+  name,
+  delay;
+
+  String present(TranslationsEn t) => switch (this) {
+        ProxiesSort.unsorted => t.proxies.sortOptions.unsorted,
+        ProxiesSort.name => t.proxies.sortOptions.name,
+        ProxiesSort.delay => t.proxies.sortOptions.delay,
+      };
+}
+
+final proxiesSortProvider = AlwaysAlivePrefNotifier.provider(
+  "proxies_sort_mode",
+  ProxiesSort.unsorted,
+  mapFrom: ProxiesSort.values.byName,
+  mapTo: (value) => value.name,
+);
+
+@riverpod
 class ProxiesNotifier extends _$ProxiesNotifier with AppLogger {
   @override
   Stream<List<OutboundGroup>> build() async* {
-    loggy.debug("building");
     final serviceRunning = await ref.watch(serviceRunningProvider.future);
     if (!serviceRunning) {
       throw const CoreServiceNotRunning();
     }
-    yield* ref.watch(coreFacadeProvider).watchOutbounds().map(
+    final sortBy = ref.watch(proxiesSortProvider);
+    yield* ref
+        .watch(coreFacadeProvider)
+        .watchOutbounds()
+        .map(
           (event) => event.getOrElse(
             (f) {
-              loggy.warning("error receiving proxies", f);
+              loggy.warning("error receiving proxies: $f");
               throw f;
             },
           ),
-        );
+        )
+        .asyncMap((proxies) async => _sortOutbounds(proxies, sortBy));
+  }
+
+  Future<List<OutboundGroup>> _sortOutbounds(
+    List<OutboundGroup> outbounds,
+    ProxiesSort sortBy,
+  ) async {
+    return CombineWorker().execute(
+      () {
+        final sortedOutbounds = <OutboundGroup>[];
+        for (final group in outbounds) {
+          final items = switch (sortBy) {
+            ProxiesSort.name => group.items.sortedBy((e) => e.tag),
+            ProxiesSort.delay => group.items.sortedWith((a, b) {
+                final ai = a.urlTestDelay;
+                final bi = b.urlTestDelay;
+                if (ai == 0 && bi == 0) return -1;
+                if (ai == 0 && bi > 0) return 1;
+                if (ai > 0 && bi == 0) return -1;
+                if (ai == bi && a.type.isGroup) return -1;
+                return ai.compareTo(bi);
+              }),
+            ProxiesSort.unsorted => group.items,
+          };
+          sortedOutbounds.add(group.copyWith(items: items));
+        }
+        return sortedOutbounds;
+      },
+    );
   }
 
   Future<void> changeProxy(String groupTag, String outboundTag) async {

lib/features/proxies/view/proxies_page.dart

@@ -17,6 +17,7 @@ class ProxiesPage extends HookConsumerWidget with PresLogger {
 
     final asyncProxies = ref.watch(proxiesNotifierProvider);
     final notifier = ref.watch(proxiesNotifierProvider.notifier);
+    final sortBy = ref.watch(proxiesSortProvider);
 
     final selectActiveProxyMutation = useMutation(
       initialOnFailure: (error) =>
@@ -50,7 +51,27 @@ class ProxiesPage extends HookConsumerWidget with PresLogger {
         return Scaffold(
           body: CustomScrollView(
             slivers: [
-              NestedTabAppBar(title: Text(t.proxies.pageTitle.titleCase)),
+              NestedTabAppBar(
+                title: Text(t.proxies.pageTitle.titleCase),
+                actions: [
+                  PopupMenuButton<ProxiesSort>(
+                    initialValue: sortBy,
+                    onSelected: ref.read(proxiesSortProvider.notifier).update,
+                    icon: const Icon(Icons.sort),
+                    tooltip: t.proxies.sortTooltip,
+                    itemBuilder: (context) {
+                      return [
+                        ...ProxiesSort.values.map(
+                          (e) => PopupMenuItem(
+                            value: e,
+                            child: Text(e.present(t)),
+                          ),
+                        ),
+                      ];
+                    },
+                  ),
+                ],
+              ),
               SliverLayoutBuilder(
                 builder: (context, constraints) {
                   final width = constraints.crossAxisExtent;