fix(templates): show clear message after auto-import instead of "undefined"

Frontend read res.count but the auto-import endpoint returns imported_count,
so the toast showed "Импортировано: undefined". Read imported_count and show
a distinct message when no new templates were imported.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/features/templates/TemplatesPage.tsx

@@ -46,7 +46,12 @@ export default function TemplatesPage() {
     if (!importServerId) return;
     autoImport.mutate(Number(importServerId), {
       onSuccess: (res) => {
-        toast.success(`${t('templates.imported')}: ${res.count}`);
+        const count = res.imported_count ?? 0;
+        toast.success(
+          count > 0
+            ? t('templates.imported_count', { count })
+            : t('templates.imported_none'),
+        );
         setImportDialogOpen(false);
       },
       onError: (err: Error) => toast.error(err.message),

frontend/src/hooks/use-templates.ts

@@ -60,7 +60,7 @@ export function useDiscoverTemplates(serverId: number) {
 export function useAutoImportTemplates() {
   const qc = useQueryClient();
   return useMutation({
-    mutationFn: (serverId: number) => apiClient.post<{ success: boolean; count: number }>(`/templates/api/auto-import/${serverId}`),
+    mutationFn: (serverId: number) => apiClient.post<{ success: boolean; imported_count: number }>(`/templates/api/auto-import/${serverId}`),
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: templateKeys.groups });
       qc.invalidateQueries({ queryKey: ['templates'] });

frontend/src/locales/en.json

@@ -1007,6 +1007,8 @@
     "os": "Operating System",
     "version": "Version",
     "imported": "Imported",
+    "imported_count": "Templates imported: {{count}}",
+    "imported_none": "No new templates found to import",
     "select_server": "Select server",
     "import_btn": "Import Templates",
     "group": "Group",

frontend/src/locales/ru.json

@@ -1007,6 +1007,8 @@
     "os": "Операционная система",
     "version": "Версия",
     "imported": "Импортировано",
+    "imported_count": "Импортировано шаблонов: {{count}}",
+    "imported_none": "Новых шаблонов для импорта не найдено",
     "select_server": "Выберите сервер",
     "import_btn": "Импортировать шаблоны",
     "group": "Группа",