diff --git a/packages/frontend/src/components/MkPasswordDialog.vue b/packages/frontend/src/components/MkPasswordDialog.vue
index c77e912199..7180e5e2ca 100644
--- a/packages/frontend/src/components/MkPasswordDialog.vue
+++ b/packages/frontend/src/components/MkPasswordDialog.vue
@@ -41,7 +41,9 @@ import MkInput from '@/components/MkInput.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkModalWindow from '@/components/MkModalWindow.vue';
 import { i18n } from '@/i18n.js';
-import { $i } from '@/account.js';
+import { signinRequired } from '@/account.js';
+
+const $i = signinRequired();
 
 const emit = defineEmits<{
 	(ev: 'done', v: { password: string; token: string | null; }): void;
diff --git a/packages/frontend/src/components/MkPoll.vue b/packages/frontend/src/components/MkPoll.vue
index a318799ade..4cac1fe9c3 100644
--- a/packages/frontend/src/components/MkPoll.vue
+++ b/packages/frontend/src/components/MkPoll.vue
@@ -35,9 +35,10 @@ import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { i18n } from '@/i18n.js';
 import { useInterval } from '@/scripts/use-interval.js';
+import { WithNonNullable } from '@/type.js';
 
 const props = defineProps<{
-	note: Misskey.entities.Note;
+	note: WithNonNullable<Misskey.entities.Note, 'poll'>;
 	readOnly?: boolean;
 }>();
 
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 8c6fba6637..1e073a7de9 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -121,7 +121,7 @@ import { defaultStore, notePostInterruptors, postFormActions } from '@/store.js'
 import MkInfo from '@/components/MkInfo.vue';
 import { i18n } from '@/i18n.js';
 import { instance } from '@/instance.js';
-import { $i, notesCount, incNotesCount, getAccounts, openAccountMenu as openAccountMenu_ } from '@/account.js';
+import { signinRequired, notesCount, incNotesCount, getAccounts, openAccountMenu as openAccountMenu_ } from '@/account.js';
 import { uploadFile } from '@/scripts/upload.js';
 import { deepClone } from '@/scripts/clone.js';
 import MkRippleEffect from '@/components/MkRippleEffect.vue';
@@ -130,6 +130,8 @@ import { claimAchievement } from '@/scripts/achievements.js';
 import { emojiPicker } from '@/scripts/emoji-picker.js';
 import { mfmFunctionPicker } from '@/scripts/mfm-function-picker.js';
 
+const $i = signinRequired();
+
 const modal = inject('modal');
 
 const props = withDefaults(defineProps<{
@@ -308,7 +310,7 @@ if (props.reply && props.reply.text != null) {
 	}
 }
 
-if ($i?.isSilenced && visibility.value === 'public') {
+if ($i.isSilenced && visibility.value === 'public') {
 	visibility.value = 'home';
 }
 
@@ -461,7 +463,7 @@ function setVisibility() {
 
 	os.popup(defineAsyncComponent(() => import('@/components/MkVisibilityPicker.vue')), {
 		currentVisibility: visibility.value,
-		isSilenced: $i?.isSilenced,
+		isSilenced: $i.isSilenced,
 		localOnly: localOnly.value,
 		src: visibilityButton.value,
 	}, {
diff --git a/packages/frontend/src/components/MkRippleEffect.vue b/packages/frontend/src/components/MkRippleEffect.vue
index 860b083327..11f1aec30f 100644
--- a/packages/frontend/src/components/MkRippleEffect.vue
+++ b/packages/frontend/src/components/MkRippleEffect.vue
@@ -77,7 +77,14 @@ const emit = defineEmits<{
 	(ev: 'end'): void;
 }>();
 
-const particles = [];
+const particles: {
+	size: number;
+	xA: number;
+	yA: number;
+	xB: number;
+	yB: number;
+	color: string;
+}[] = [];
 const origin = 64;
 const colors = ['#FF1493', '#00FFFF', '#FFE202'];
 const zIndex = os.claimZIndex('high');
diff --git a/packages/frontend/src/components/MkTooltip.vue b/packages/frontend/src/components/MkTooltip.vue
index ea22175e03..d40cd95f3a 100644
--- a/packages/frontend/src/components/MkTooltip.vue
+++ b/packages/frontend/src/components/MkTooltip.vue
@@ -13,8 +13,10 @@ SPDX-License-Identifier: AGPL-3.0-only
 >
 	<div v-show="showing" ref="el" :class="$style.root" class="_acrylic _shadow" :style="{ zIndex, maxWidth: maxWidth + 'px' }">
 		<slot>
-			<Mfm v-if="asMfm" :text="text"/>
-			<span v-else>{{ text }}</span>
+			<template v-if="text">
+				<Mfm v-if="asMfm" :text="text"/>
+				<span v-else>{{ text }}</span>
+			</template>
 		</slot>
 	</div>
 </Transition>
@@ -31,7 +33,7 @@ const props = withDefaults(defineProps<{
 	targetElement?: HTMLElement;
 	x?: number;
 	y?: number;
-	text: string;
+	text?: string;
 	asMfm?: boolean;
 	maxWidth?: number;
 	direction?: 'top' | 'bottom' | 'right' | 'left';
diff --git a/packages/frontend/src/type.ts b/packages/frontend/src/type.ts
new file mode 100644
index 0000000000..9c0fc2a11e
--- /dev/null
+++ b/packages/frontend/src/type.ts
@@ -0,0 +1,3 @@
+export type WithRequired<T, K extends keyof T> = T & { [P in K]-?: T[P] };
+
+export type WithNonNullable<T, K extends keyof T> = T & { [P in K]-?: NonNullable<T[P]> };