fix: края архива, истории, пагинации и лимита попыток

web/src/main/kotlin/ru/ysu/lms/web/admin/AdminGroupController.kt

@@ -113,10 +113,11 @@ class AdminGroupController(
         model: Model,
     ): String {
         val safePage = page.coerceAtLeast(0)
-        val rows = api.listGroups(token(session), safePage, GROUP_PAGE_SIZE)
+        val loaded = api.listGroups(token(session), safePage, GROUP_PAGE_SIZE + 1)
+        val rows = loaded.take(GROUP_PAGE_SIZE)
         model.addAttribute("groups", rows)
         model.addAttribute("page", safePage)
-        model.addAttribute("hasNext", rows.size == GROUP_PAGE_SIZE)
+        model.addAttribute("hasNext", loaded.size > GROUP_PAGE_SIZE)
         return "admin/groups"
     }