diff --git a/packages/frontend/src/components/MkChannelList.vue b/packages/frontend/src/components/MkChannelList.vue
index a8ef17d4fd..bbfc87e623 100644
--- a/packages/frontend/src/components/MkChannelList.vue
+++ b/packages/frontend/src/components/MkChannelList.vue
@@ -26,7 +26,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	pagination: Paging;
diff --git a/packages/frontend/src/components/MkDonation.vue b/packages/frontend/src/components/MkDonation.vue
index d30d5fd109..87278ce0b7 100644
--- a/packages/frontend/src/components/MkDonation.vue
+++ b/packages/frontend/src/components/MkDonation.vue
@@ -46,7 +46,7 @@ import { miLocalStorage } from '@/local-storage.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const emit = defineEmits<{
 	(ev: 'closed'): void;
diff --git a/packages/frontend/src/components/MkFeaturedPhotos.vue b/packages/frontend/src/components/MkFeaturedPhotos.vue
index 995c89a972..01d4190000 100644
--- a/packages/frontend/src/components/MkFeaturedPhotos.vue
+++ b/packages/frontend/src/components/MkFeaturedPhotos.vue
@@ -11,7 +11,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 </script>
 
 <style lang="scss" module>
diff --git a/packages/frontend/src/components/MkForgotPassword.vue b/packages/frontend/src/components/MkForgotPassword.vue
index 2a074c2fa5..c9a8b1f8ed 100644
--- a/packages/frontend/src/components/MkForgotPassword.vue
+++ b/packages/frontend/src/components/MkForgotPassword.vue
@@ -49,7 +49,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const emit = defineEmits<{
 	(ev: 'done'): void;
diff --git a/packages/frontend/src/components/MkFormDialog.vue b/packages/frontend/src/components/MkFormDialog.vue
index 54c47add31..cbf895cd0e 100644
--- a/packages/frontend/src/components/MkFormDialog.vue
+++ b/packages/frontend/src/components/MkFormDialog.vue
@@ -86,7 +86,7 @@ import MkModalWindow from '@/components/MkModalWindow.vue';
 import { i18n } from '@/i18n.js';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = defineProps<{
 	title: string;
diff --git a/packages/frontend/src/components/MkLink.vue b/packages/frontend/src/components/MkLink.vue
index 59e45af09c..56f46fdf6d 100644
--- a/packages/frontend/src/components/MkLink.vue
+++ b/packages/frontend/src/components/MkLink.vue
@@ -23,7 +23,7 @@ import { MkABehavior } from '@/components/global/MkA.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	url: string;
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index e2e9422c10..90150fd953 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -203,7 +203,7 @@ import { getAppearNote } from '@/scripts/get-appear-note.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index b67c4165c9..736c0972d6 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -239,7 +239,7 @@ import { type Keymap } from '@/scripts/hotkey.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;
diff --git a/packages/frontend/src/components/MkNotes.vue b/packages/frontend/src/components/MkNotes.vue
index 68e0cbab44..cb05531335 100644
--- a/packages/frontend/src/components/MkNotes.vue
+++ b/packages/frontend/src/components/MkNotes.vue
@@ -40,7 +40,7 @@ import MkPagination, { Paging } from '@/components/MkPagination.vue';
 import { i18n } from '@/i18n.js';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = defineProps<{
 	pagination: Paging;
diff --git a/packages/frontend/src/components/MkNotification.vue b/packages/frontend/src/components/MkNotification.vue
index b27752d44c..bacb9155b2 100644
--- a/packages/frontend/src/components/MkNotification.vue
+++ b/packages/frontend/src/components/MkNotification.vue
@@ -151,7 +151,7 @@ import { signinRequired } from '@/account.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const $i = signinRequired();
 
diff --git a/packages/frontend/src/components/MkNotifications.vue b/packages/frontend/src/components/MkNotifications.vue
index 6672a45ab3..8bc5806b2b 100644
--- a/packages/frontend/src/components/MkNotifications.vue
+++ b/packages/frontend/src/components/MkNotifications.vue
@@ -35,7 +35,7 @@ import { notificationTypes } from '@/const.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { defaultStore } from '@/store.js';
 import MkPullToRefresh from '@/components/MkPullToRefresh.vue';
 import * as Misskey from 'misskey-js';
diff --git a/packages/frontend/src/components/MkPagination.vue b/packages/frontend/src/components/MkPagination.vue
index 75159fa9ac..9b2b6216ec 100644
--- a/packages/frontend/src/components/MkPagination.vue
+++ b/packages/frontend/src/components/MkPagination.vue
@@ -93,7 +93,7 @@ function concatMapWithArray(map: MisskeyEntityMap, entities: MisskeyEntity[]): M
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import MkButton from '@/components/MkButton.vue';
 
 const props = withDefaults(defineProps<{
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index e901d862c8..afccb1a50c 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -131,7 +131,7 @@ import { mfmFunctionPicker } from '@/scripts/mfm-function-picker.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const $i = signinRequired();
 
diff --git a/packages/frontend/src/components/MkPushNotificationAllowButton.vue b/packages/frontend/src/components/MkPushNotificationAllowButton.vue
index 07777e3670..2eec7d59fc 100644
--- a/packages/frontend/src/components/MkPushNotificationAllowButton.vue
+++ b/packages/frontend/src/components/MkPushNotificationAllowButton.vue
@@ -50,7 +50,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 defineProps<{
 	primary?: boolean;
diff --git a/packages/frontend/src/components/MkSignupDialog.form.vue b/packages/frontend/src/components/MkSignupDialog.form.vue
index 8a263b1e3b..7a95e5becc 100644
--- a/packages/frontend/src/components/MkSignupDialog.form.vue
+++ b/packages/frontend/src/components/MkSignupDialog.form.vue
@@ -92,7 +92,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	autoSet?: boolean;
diff --git a/packages/frontend/src/components/MkSignupDialog.rules.vue b/packages/frontend/src/components/MkSignupDialog.rules.vue
index 013091b688..907b6597d0 100644
--- a/packages/frontend/src/components/MkSignupDialog.rules.vue
+++ b/packages/frontend/src/components/MkSignupDialog.rules.vue
@@ -72,7 +72,7 @@ import * as os from '@/os.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const availableServerRules = serverMetadata.serverRules.length > 0;
 const availableTos = serverMetadata.tosUrl != null && serverMetadata.tosUrl !== '';
diff --git a/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue b/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue
index 5e3d75e1e4..b501ad5c11 100644
--- a/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue
+++ b/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue
@@ -49,7 +49,7 @@ import * as os from '@/os.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const emit = defineEmits<{
 	(ev: 'closed'): void;
diff --git a/packages/frontend/src/components/MkTimeline.vue b/packages/frontend/src/components/MkTimeline.vue
index 4b7f036171..bab93e40bc 100644
--- a/packages/frontend/src/components/MkTimeline.vue
+++ b/packages/frontend/src/components/MkTimeline.vue
@@ -30,7 +30,7 @@ import { Paging } from '@/components/MkPagination.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	src: BasicTimelineType | 'mentions' | 'directs' | 'list' | 'antenna' | 'channel' | 'role';
diff --git a/packages/frontend/src/components/MkTutorialDialog.vue b/packages/frontend/src/components/MkTutorialDialog.vue
index b19712a144..9037acd5be 100644
--- a/packages/frontend/src/components/MkTutorialDialog.vue
+++ b/packages/frontend/src/components/MkTutorialDialog.vue
@@ -163,7 +163,7 @@ import * as os from '@/os.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = defineProps<{
 	initialPage?: number;
diff --git a/packages/frontend/src/components/MkUserList.vue b/packages/frontend/src/components/MkUserList.vue
index bea58750f6..f8eeddb966 100644
--- a/packages/frontend/src/components/MkUserList.vue
+++ b/packages/frontend/src/components/MkUserList.vue
@@ -28,7 +28,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	pagination: Paging;
diff --git a/packages/frontend/src/components/MkUserPopup.vue b/packages/frontend/src/components/MkUserPopup.vue
index 71621b3baf..5829e8d126 100644
--- a/packages/frontend/src/components/MkUserPopup.vue
+++ b/packages/frontend/src/components/MkUserPopup.vue
@@ -69,7 +69,7 @@ import { $i } from '@/account.js';
 import { isFollowingVisibleForMe, isFollowersVisibleForMe } from '@/scripts/isFfVisibleForMe.js';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 const mediaProxy = inject(DI.mediaProxy);
 
 const props = defineProps<{
diff --git a/packages/frontend/src/components/MkUserSetupDialog.vue b/packages/frontend/src/components/MkUserSetupDialog.vue
index c752f4aa9b..274978e7b4 100644
--- a/packages/frontend/src/components/MkUserSetupDialog.vue
+++ b/packages/frontend/src/components/MkUserSetupDialog.vue
@@ -143,7 +143,7 @@ import * as os from '@/os.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const emit = defineEmits<{
 	(ev: 'closed'): void;
diff --git a/packages/frontend/src/components/MkVisitorDashboard.vue b/packages/frontend/src/components/MkVisitorDashboard.vue
index e70f209eb4..dacd3eac1c 100644
--- a/packages/frontend/src/components/MkVisitorDashboard.vue
+++ b/packages/frontend/src/components/MkVisitorDashboard.vue
@@ -68,7 +68,7 @@ import { openInstanceMenu } from '@/ui/_common_/common.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const stats = ref<Misskey.entities.StatsResponse | null>(null);
 
diff --git a/packages/frontend/src/components/global/MkAd.vue b/packages/frontend/src/components/global/MkAd.vue
index dd514ddc6b..ec24a7da7e 100644
--- a/packages/frontend/src/components/global/MkAd.vue
+++ b/packages/frontend/src/components/global/MkAd.vue
@@ -52,7 +52,7 @@ import { $i } from '@/account.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 type Ad = (typeof serverMetadata)['ads'][number];
 
diff --git a/packages/frontend/src/components/global/MkError.vue b/packages/frontend/src/components/global/MkError.vue
index 8b6528f462..9ca85fb2a9 100644
--- a/packages/frontend/src/components/global/MkError.vue
+++ b/packages/frontend/src/components/global/MkError.vue
@@ -21,7 +21,7 @@ import { defaultStore } from '@/store.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const emit = defineEmits<{
 	(ev: 'retry'): void;
diff --git a/packages/frontend/src/components/global/MkUrl.vue b/packages/frontend/src/components/global/MkUrl.vue
index 3cd8e2d541..1f792f20c6 100644
--- a/packages/frontend/src/components/global/MkUrl.vue
+++ b/packages/frontend/src/components/global/MkUrl.vue
@@ -34,7 +34,7 @@ import { MkABehavior } from '@/components/global/MkA.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 function safeURIDecode(str: string): string {
 	try {
diff --git a/packages/frontend/src/components/page/page.text.vue b/packages/frontend/src/components/page/page.text.vue
index 306b48f8f8..2cac5dce23 100644
--- a/packages/frontend/src/components/page/page.text.vue
+++ b/packages/frontend/src/components/page/page.text.vue
@@ -20,7 +20,7 @@ import { extractUrlFromMfm } from '@/scripts/extract-url-from-mfm.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const MkUrlPreview = defineAsyncComponent(() => import('@/components/MkUrlPreview.vue'));
 
diff --git a/packages/frontend/src/pages/_error_.vue b/packages/frontend/src/pages/_error_.vue
index 929693b1f3..a68d184075 100644
--- a/packages/frontend/src/pages/_error_.vue
+++ b/packages/frontend/src/pages/_error_.vue
@@ -39,7 +39,7 @@ import { defaultStore } from '@/store.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	error?: Error;
diff --git a/packages/frontend/src/pages/about-misskey.vue b/packages/frontend/src/pages/about-misskey.vue
index 3b55521cb0..5c89f27cb5 100644
--- a/packages/frontend/src/pages/about-misskey.vue
+++ b/packages/frontend/src/pages/about-misskey.vue
@@ -147,7 +147,7 @@ import { $i } from '@/account.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const patronsWithIcon = [{
 	name: 'カイヤン',
diff --git a/packages/frontend/src/pages/about.overview.vue b/packages/frontend/src/pages/about.overview.vue
index e43b5e9e3a..bac866a102 100644
--- a/packages/frontend/src/pages/about.overview.vue
+++ b/packages/frontend/src/pages/about.overview.vue
@@ -141,7 +141,7 @@ import MkLink from '@/components/MkLink.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const initStats = () => misskeyApi('stats', {});
 </script>
diff --git a/packages/frontend/src/pages/admin/branding.vue b/packages/frontend/src/pages/admin/branding.vue
index 1db0e84bdc..3dcce74c99 100644
--- a/packages/frontend/src/pages/admin/branding.vue
+++ b/packages/frontend/src/pages/admin/branding.vue
@@ -121,7 +121,7 @@ import { host } from '@/config.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const iconUrl = ref<string | null>(null);
 const app192IconUrl = ref<string | null>(null);
diff --git a/packages/frontend/src/pages/admin/index.vue b/packages/frontend/src/pages/admin/index.vue
index 6447d00b99..a0911ca309 100644
--- a/packages/frontend/src/pages/admin/index.vue
+++ b/packages/frontend/src/pages/admin/index.vue
@@ -44,7 +44,7 @@ import { useRouter } from '@/router/supplier.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const isEmpty = (x: string | null) => x == null || x === '';
 
diff --git a/packages/frontend/src/pages/admin/roles.editor.vue b/packages/frontend/src/pages/admin/roles.editor.vue
index 20efb64e7a..66bf352421 100644
--- a/packages/frontend/src/pages/admin/roles.editor.vue
+++ b/packages/frontend/src/pages/admin/roles.editor.vue
@@ -613,7 +613,7 @@ import { deepClone } from '@/scripts/clone.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const emit = defineEmits<{
 	(ev: 'update:modelValue', v: any): void;
diff --git a/packages/frontend/src/pages/admin/roles.role.vue b/packages/frontend/src/pages/admin/roles.role.vue
index 7624970569..21f6d142de 100644
--- a/packages/frontend/src/pages/admin/roles.role.vue
+++ b/packages/frontend/src/pages/admin/roles.role.vue
@@ -77,7 +77,7 @@ import MkPagination from '@/components/MkPagination.vue';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { useRouter } from '@/router/supplier.js';
 
 const router = useRouter();
diff --git a/packages/frontend/src/pages/admin/roles.vue b/packages/frontend/src/pages/admin/roles.vue
index bc63d4d758..96605e16b2 100644
--- a/packages/frontend/src/pages/admin/roles.vue
+++ b/packages/frontend/src/pages/admin/roles.vue
@@ -258,7 +258,7 @@ import { useRouter } from '@/router/supplier.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const router = useRouter();
 const baseRoleQ = ref('');
diff --git a/packages/frontend/src/pages/admin/server-rules.vue b/packages/frontend/src/pages/admin/server-rules.vue
index 2c89e48247..f49801aaad 100644
--- a/packages/frontend/src/pages/admin/server-rules.vue
+++ b/packages/frontend/src/pages/admin/server-rules.vue
@@ -52,7 +52,7 @@ import MkInput from '@/components/MkInput.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const Sortable = defineAsyncComponent(() => import('vuedraggable').then(x => x.default));
 
diff --git a/packages/frontend/src/pages/admin/settings.vue b/packages/frontend/src/pages/admin/settings.vue
index fe0b503297..9da10f5afd 100644
--- a/packages/frontend/src/pages/admin/settings.vue
+++ b/packages/frontend/src/pages/admin/settings.vue
@@ -225,7 +225,7 @@ import MkSelect from '@/components/MkSelect.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const name = ref<string | null>(null);
 const shortName = ref<string | null>(null);
diff --git a/packages/frontend/src/pages/ads.vue b/packages/frontend/src/pages/ads.vue
index fbee6e166b..4c7fb92c74 100644
--- a/packages/frontend/src/pages/ads.vue
+++ b/packages/frontend/src/pages/ads.vue
@@ -22,7 +22,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 definePageMetadata(() => ({
 	title: i18n.ts.ads,
diff --git a/packages/frontend/src/pages/contact.vue b/packages/frontend/src/pages/contact.vue
index 6cd4665dfc..71d09c4306 100644
--- a/packages/frontend/src/pages/contact.vue
+++ b/packages/frontend/src/pages/contact.vue
@@ -43,7 +43,7 @@ import MkLink from '@/components/MkLink.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 definePageMetadata(() => ({
 	title: i18n.ts.inquiry,
diff --git a/packages/frontend/src/pages/drive.file.info.vue b/packages/frontend/src/pages/drive.file.info.vue
index 280cda0766..c526ec6d9f 100644
--- a/packages/frontend/src/pages/drive.file.info.vue
+++ b/packages/frontend/src/pages/drive.file.info.vue
@@ -85,7 +85,7 @@ import bytes from '@/filters/bytes.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { i18n } from '@/i18n.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
diff --git a/packages/frontend/src/pages/favorites.vue b/packages/frontend/src/pages/favorites.vue
index 43aee68645..2ed4bd5c73 100644
--- a/packages/frontend/src/pages/favorites.vue
+++ b/packages/frontend/src/pages/favorites.vue
@@ -34,7 +34,7 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const pagination = {
 	endpoint: 'i/favorites' as const,
diff --git a/packages/frontend/src/pages/follow-requests.vue b/packages/frontend/src/pages/follow-requests.vue
index 3cb48a96f9..a393e5412f 100644
--- a/packages/frontend/src/pages/follow-requests.vue
+++ b/packages/frontend/src/pages/follow-requests.vue
@@ -47,7 +47,7 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const paginationComponent = shallowRef<InstanceType<typeof MkPagination>>();
 
diff --git a/packages/frontend/src/pages/invite.vue b/packages/frontend/src/pages/invite.vue
index 5d67805de4..c49b3ea3aa 100644
--- a/packages/frontend/src/pages/invite.vue
+++ b/packages/frontend/src/pages/invite.vue
@@ -49,7 +49,7 @@ import { $i } from '@/account.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const pagingComponent = shallowRef<InstanceType<typeof MkPagination>>();
 const currentInviteLimit = ref<null | number>(null);
diff --git a/packages/frontend/src/pages/list.vue b/packages/frontend/src/pages/list.vue
index edd6573844..d927f8fffe 100644
--- a/packages/frontend/src/pages/list.vue
+++ b/packages/frontend/src/pages/list.vue
@@ -46,7 +46,7 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = defineProps<{
 	listId: string;
diff --git a/packages/frontend/src/pages/my-antennas/index.vue b/packages/frontend/src/pages/my-antennas/index.vue
index d4f344972f..dc9f32749c 100644
--- a/packages/frontend/src/pages/my-antennas/index.vue
+++ b/packages/frontend/src/pages/my-antennas/index.vue
@@ -36,7 +36,7 @@ import { antennasCache } from '@/cache.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const antennas = computed(() => antennasCache.value.value ?? []);
 
diff --git a/packages/frontend/src/pages/my-lists/index.vue b/packages/frontend/src/pages/my-lists/index.vue
index 2a9d2fcb4f..ab32c7780d 100644
--- a/packages/frontend/src/pages/my-lists/index.vue
+++ b/packages/frontend/src/pages/my-lists/index.vue
@@ -39,7 +39,7 @@ import { userListsCache } from '@/cache.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { signinRequired } from '@/account.js';
 
 const $i = signinRequired();
diff --git a/packages/frontend/src/pages/not-found.vue b/packages/frontend/src/pages/not-found.vue
index 192f1dfde8..6b2bb5906d 100644
--- a/packages/frontend/src/pages/not-found.vue
+++ b/packages/frontend/src/pages/not-found.vue
@@ -20,7 +20,7 @@ import { pleaseLogin } from '@/scripts/please-login.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = defineProps<{
 	showLoginPopup?: boolean;
diff --git a/packages/frontend/src/pages/page.vue b/packages/frontend/src/pages/page.vue
index c23a7f7a8e..d929b03db6 100644
--- a/packages/frontend/src/pages/page.vue
+++ b/packages/frontend/src/pages/page.vue
@@ -123,7 +123,7 @@ import { MenuItem } from '@/types/menu';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { DI } from '@/di.js';
 
 const mediaProxy = inject(DI.mediaProxy);
diff --git a/packages/frontend/src/pages/role.vue b/packages/frontend/src/pages/role.vue
index 74c841a040..259e3e8126 100644
--- a/packages/frontend/src/pages/role.vue
+++ b/packages/frontend/src/pages/role.vue
@@ -47,7 +47,7 @@ import { instanceName } from '@/config.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	role: string;
diff --git a/packages/frontend/src/pages/search.note.vue b/packages/frontend/src/pages/search.note.vue
index dcf2c7f076..d55f112620 100644
--- a/packages/frontend/src/pages/search.note.vue
+++ b/packages/frontend/src/pages/search.note.vue
@@ -69,7 +69,7 @@ import { $i } from '@/account.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	query?: string;
diff --git a/packages/frontend/src/pages/search.vue b/packages/frontend/src/pages/search.vue
index fa6d5b562f..1672122687 100644
--- a/packages/frontend/src/pages/search.vue
+++ b/packages/frontend/src/pages/search.vue
@@ -34,7 +34,7 @@ import MkHorizontalSwipe from '@/components/MkHorizontalSwipe.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = withDefaults(defineProps<{
 	query?: string,
diff --git a/packages/frontend/src/pages/settings/apps.vue b/packages/frontend/src/pages/settings/apps.vue
index a5f95c3643..3335949d0f 100644
--- a/packages/frontend/src/pages/settings/apps.vue
+++ b/packages/frontend/src/pages/settings/apps.vue
@@ -55,7 +55,7 @@ import MkButton from '@/components/MkButton.vue';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const list = ref<InstanceType<typeof FormPagination>>();
 
diff --git a/packages/frontend/src/pages/settings/email.vue b/packages/frontend/src/pages/settings/email.vue
index 5d40c563ff..a0ee1a5386 100644
--- a/packages/frontend/src/pages/settings/email.vue
+++ b/packages/frontend/src/pages/settings/email.vue
@@ -61,7 +61,7 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const $i = signinRequired();
 
diff --git a/packages/frontend/src/pages/settings/index.vue b/packages/frontend/src/pages/settings/index.vue
index 32976130da..e05cc85929 100644
--- a/packages/frontend/src/pages/settings/index.vue
+++ b/packages/frontend/src/pages/settings/index.vue
@@ -40,7 +40,7 @@ import { useRouter } from '@/router/supplier.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const indexInfo = {
 	title: i18n.ts.settings,
diff --git a/packages/frontend/src/pages/settings/mute-block.vue b/packages/frontend/src/pages/settings/mute-block.vue
index 2e9a9bd22a..196b84d9b0 100644
--- a/packages/frontend/src/pages/settings/mute-block.vue
+++ b/packages/frontend/src/pages/settings/mute-block.vue
@@ -139,7 +139,7 @@ import { misskeyApi } from '@/scripts/misskey-api.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { signinRequired } from '@/account.js';
 import MkFolder from '@/components/MkFolder.vue';
 
diff --git a/packages/frontend/src/pages/settings/theme.vue b/packages/frontend/src/pages/settings/theme.vue
index 3fbd6745db..4727f1931e 100644
--- a/packages/frontend/src/pages/settings/theme.vue
+++ b/packages/frontend/src/pages/settings/theme.vue
@@ -92,7 +92,7 @@ import * as os from '@/os.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 async function reloadAsk() {
 	const { canceled } = await os.confirm({
diff --git a/packages/frontend/src/pages/timeline.vue b/packages/frontend/src/pages/timeline.vue
index a20637b6b1..7a2c43a5b2 100644
--- a/packages/frontend/src/pages/timeline.vue
+++ b/packages/frontend/src/pages/timeline.vue
@@ -59,7 +59,7 @@ provide('shouldOmitHeaderTitle', true);
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const tlComponent = shallowRef<InstanceType<typeof MkTimeline>>();
 const rootEl = shallowRef<HTMLElement>();
diff --git a/packages/frontend/src/pages/user/home.vue b/packages/frontend/src/pages/user/home.vue
index 580299301a..ec94782d9b 100644
--- a/packages/frontend/src/pages/user/home.vue
+++ b/packages/frontend/src/pages/user/home.vue
@@ -177,7 +177,7 @@ import { useRouter } from '@/router/supplier.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 const mediaProxy = inject(DI.mediaProxy);
 
 function calcAge(birthdate: string): number {
diff --git a/packages/frontend/src/pages/welcome.entrance.a.vue b/packages/frontend/src/pages/welcome.entrance.a.vue
index 511566eb73..8fb628e929 100644
--- a/packages/frontend/src/pages/welcome.entrance.a.vue
+++ b/packages/frontend/src/pages/welcome.entrance.a.vue
@@ -47,7 +47,7 @@ import MkVisitorDashboard from '@/components/MkVisitorDashboard.vue';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 const mediaProxy = inject(DI.mediaProxy);
 
 const instances = ref<Misskey.entities.FederationInstance[]>();
diff --git a/packages/frontend/src/ui/_common_/navbar-for-mobile.vue b/packages/frontend/src/ui/_common_/navbar-for-mobile.vue
index 9c91efa7d1..965fedf0c6 100644
--- a/packages/frontend/src/ui/_common_/navbar-for-mobile.vue
+++ b/packages/frontend/src/ui/_common_/navbar-for-mobile.vue
@@ -59,7 +59,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const menu = toRef(defaultStore.state, 'menu');
 const otherMenuItemIndicated = computed(() => {
diff --git a/packages/frontend/src/ui/_common_/navbar.vue b/packages/frontend/src/ui/_common_/navbar.vue
index 5f1e378a11..7161455bc6 100644
--- a/packages/frontend/src/ui/_common_/navbar.vue
+++ b/packages/frontend/src/ui/_common_/navbar.vue
@@ -70,7 +70,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const iconOnly = ref(false);
 
diff --git a/packages/frontend/src/ui/classic.header.vue b/packages/frontend/src/ui/classic.header.vue
index 5de773000f..f9efebff6f 100644
--- a/packages/frontend/src/ui/classic.header.vue
+++ b/packages/frontend/src/ui/classic.header.vue
@@ -58,7 +58,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const WINDOW_THRESHOLD = 1400;
 
diff --git a/packages/frontend/src/ui/classic.sidebar.vue b/packages/frontend/src/ui/classic.sidebar.vue
index d0d619dd6a..8fd9efe926 100644
--- a/packages/frontend/src/ui/classic.sidebar.vue
+++ b/packages/frontend/src/ui/classic.sidebar.vue
@@ -64,7 +64,7 @@ import { i18n } from '@/i18n.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const WINDOW_THRESHOLD = 1400;
 
diff --git a/packages/frontend/src/ui/deck/tl-column.vue b/packages/frontend/src/ui/deck/tl-column.vue
index 1af1c0a19f..3f7d1a2307 100644
--- a/packages/frontend/src/ui/deck/tl-column.vue
+++ b/packages/frontend/src/ui/deck/tl-column.vue
@@ -45,7 +45,7 @@ import * as sound from '@/scripts/sound.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const props = defineProps<{
 	column: Column;
diff --git a/packages/frontend/src/ui/visitor.vue b/packages/frontend/src/ui/visitor.vue
index bfb513b79e..dcbef01a90 100644
--- a/packages/frontend/src/ui/visitor.vue
+++ b/packages/frontend/src/ui/visitor.vue
@@ -83,7 +83,7 @@ import { mainRouter } from '@/router/main.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const isRoot = computed(() => mainRouter.currentRoute.value.name === 'index');
 
diff --git a/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue b/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue
index dcd88cc8b2..c3591fdd34 100644
--- a/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue
+++ b/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue
@@ -34,7 +34,7 @@ import { i18n } from '@/i18n.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 import { $i } from '@/account.js';
 
 const name = i18n.ts._widgets.birthdayFollowings;
diff --git a/packages/frontend/src/widgets/WidgetInstanceInfo.vue b/packages/frontend/src/widgets/WidgetInstanceInfo.vue
index 12e654abe8..fc09869fbb 100644
--- a/packages/frontend/src/widgets/WidgetInstanceInfo.vue
+++ b/packages/frontend/src/widgets/WidgetInstanceInfo.vue
@@ -27,7 +27,7 @@ import { host } from '@/config.js';
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const name = 'instanceInfo';
 
diff --git a/packages/frontend/src/widgets/WidgetRss.vue b/packages/frontend/src/widgets/WidgetRss.vue
index 508ea809b4..4d0586c372 100644
--- a/packages/frontend/src/widgets/WidgetRss.vue
+++ b/packages/frontend/src/widgets/WidgetRss.vue
@@ -34,7 +34,7 @@ import { useInterval } from '@@/js/use-interval.js';
 import { inject } from 'vue';
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const name = 'rss';
 
diff --git a/packages/frontend/src/widgets/WidgetTimeline.vue b/packages/frontend/src/widgets/WidgetTimeline.vue
index ebce27e03f..1e09910ed7 100644
--- a/packages/frontend/src/widgets/WidgetTimeline.vue
+++ b/packages/frontend/src/widgets/WidgetTimeline.vue
@@ -82,7 +82,7 @@ const { widgetProps, configure, save } = useWidgetPropsManager(name,
 
 import { DI } from '@/di.js';
 
-const serverMetadata = inject(DI.serverMetadata);
+const serverMetadata = inject(DI.serverMetadata)!;
 
 const menuOpened = ref(false);