feat: suspend instance improvements (#13861)

* feat(backend): dead instance detection

* feat(backend): suspend type detection

* feat(frontend): show suspend reason on frontend

* feat(backend): resume federation automatically if the server is automatically suspended

* docs(changelog): 配信停止まわりの改善

* lint: fix lint errors

* Update packages/frontend/src/pages/instance-info.vue

* lint: fix lint error

* chore: suspendedState => suspensionState

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/pages/admin/federation.vue

@@ -58,6 +58,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
+import * as Misskey from 'misskey-js';
 import { computed, ref } from 'vue';
 import XHeader from './_header_.vue';
 import MkInput from '@/components/MkInput.vue';
@@ -90,8 +91,17 @@ const pagination = {
 	})),
 };
 
-function getStatus(instance) {
-	if (instance.isSuspended) return 'Suspended';
+function getStatus(instance: Misskey.entities.FederationInstance) {
+	switch (instance.suspensionState) {
+		case 'manuallySuspended':
+			return 'Manually Suspended';
+		case 'goneSuspended':
+			return 'Automatically Suspended (Gone)';
+		case 'autoSuspendedForNotResponding':
+			return 'Automatically Suspended (Not Responding)';
+		case 'none':
+			break;
+	}
 	if (instance.isBlocked) return 'Blocked';
 	if (instance.isSilenced) return 'Silenced';
 	if (instance.isNotResponding) return 'Error';