Add missing routing asset warning

assets/translations/strings_en.i18n.json

@@ -233,7 +233,8 @@
             "download": "Download",
             "failureMsg": "Failed to update asset",
             "successMsg": "Successfully updated asset",
-            "addRecommended": "Add Recommended Assets"
+            "addRecommended": "Add Recommended Assets",
+            "missingGeoAssetsMsg": "Selected routing assets' files are missing. Either download them or choose existing ones."
         }
     },
     "about": {

assets/translations/strings_fa.i18n.json

@@ -233,7 +233,8 @@
             "download": "دانلود",
             "failureMsg": "دارایی به روز نشد",
             "successMsg": "دارایی با موفقیت به روز شد",
-            "addRecommended": "اضافه کردن دارایی های توصیه شده"
+            "addRecommended": "اضافه کردن دارایی های توصیه شده",
+            "missingGeoAssetsMsg": "فایل‌های دارایی‌های مسیریابی انتخابی وجود ندارد. یا آنها را دانلود کنید یا موارد موجود را انتخاب کنید."
         }
     },
     "about": {

assets/translations/strings_ru.i18n.json

@@ -233,7 +233,8 @@
             "download": "Скачать",
             "failureMsg": "Не удалось обновить объект",
             "successMsg": "Объект успешно обновлен",
-            "addRecommended": "Добавить рекомендуемые активы"
+            "addRecommended": "Добавить рекомендуемые активы",
+            "missingGeoAssetsMsg": "Файлы выбранных ресурсов маршрутизации отсутствуют. Либо скачайте их, либо выберите существующие."
         }
     },
     "about": {

assets/translations/strings_tr.i18n.json

@@ -233,7 +233,8 @@
             "download": "İndirmek",
             "failureMsg": "Öğe güncellenemedi",
             "successMsg": "Öğe başarıyla güncellendi",
-            "addRecommended": "Önerilen Varlıkları Ekle"
+            "addRecommended": "Önerilen Varlıkları Ekle",
+            "missingGeoAssetsMsg": "Seçilen yönlendirme varlıklarının dosyaları eksik. Bunları indirin veya mevcut olanları seçin."
         }
     },
     "about": {

assets/translations/strings_zh-CN.i18n.json

@@ -233,7 +233,8 @@
             "download": "下载",
             "failureMsg": "更新资源文件失败",
             "successMsg": "已成功更新资源文件",
-            "addRecommended": "添加建议的资源文件"
+            "addRecommended": "添加建议的资源文件",
+            "missingGeoAssetsMsg": "所选路由资源的文件丢失。下载它们或选择现有的。"
         }
     },
     "about": {

lib/features/geo_asset/overview/geo_assets_overview_page.dart

@@ -3,6 +3,7 @@ import 'package:hiddify/core/localization/translations.dart';
 import 'package:hiddify/features/geo_asset/overview/geo_assets_overview_notifier.dart';
 import 'package:hiddify/features/geo_asset/widget/geo_asset_tile.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:sliver_tools/sliver_tools.dart';
 
 class GeoAssetsOverviewPage extends HookConsumerWidget {
   const GeoAssetsOverviewPage({super.key});
@@ -17,6 +18,7 @@ class GeoAssetsOverviewPage extends HookConsumerWidget {
         slivers: [
           SliverAppBar(
             title: Text(t.settings.geoAssets.pageTitle),
+            pinned: true,
             actions: [
               PopupMenuButton(
                 itemBuilder: (context) {
@@ -34,6 +36,17 @@ class GeoAssetsOverviewPage extends HookConsumerWidget {
               ),
             ],
           ),
+          if (state case AsyncData(value: final geoAssets))
+            SliverPinnedHeader(
+              child: AnimatedSwitcher(
+                duration: const Duration(milliseconds: 200),
+                child: geoAssets
+                        .where((e) => e.$1.active && e.$2 == null)
+                        .isNotEmpty
+                    ? const MissingRoutingAssetsCard()
+                    : const SizedBox(),
+              ),
+            ),
           switch (state) {
             AsyncData(value: final geoAssets) => SliverList.builder(
                 itemBuilder: (context, index) {
@@ -54,3 +67,39 @@ class GeoAssetsOverviewPage extends HookConsumerWidget {
     );
   }
 }
+
+class MissingRoutingAssetsCard extends HookConsumerWidget {
+  const MissingRoutingAssetsCard({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final t = ref.watch(translationsProvider);
+
+    return Card(
+      margin: const EdgeInsets.symmetric(
+        horizontal: 12,
+        vertical: 4,
+      ),
+      child: Row(
+        children: [
+          const Padding(
+            padding: EdgeInsets.all(8.0),
+            child: Icon(Icons.lightbulb),
+          ),
+          Expanded(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                Padding(
+                  padding:
+                      const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
+                  child: Text(t.settings.geoAssets.missingGeoAssetsMsg),
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}