diff --git a/packages/backend/src/server/api/endpoints/i/notifications.ts b/packages/backend/src/server/api/endpoints/i/notifications.ts
index a2249803ee..2b343dabdd 100644
--- a/packages/backend/src/server/api/endpoints/i/notifications.ts
+++ b/packages/backend/src/server/api/endpoints/i/notifications.ts
@@ -13,7 +13,7 @@ export const meta = {
 
 	limit: {
 		duration: 60000,
-		max: 10,
+		max: 15,
 	},
 
 	kind: 'read:notifications',
diff --git a/packages/client/src/components/renote-button.vue b/packages/client/src/components/renote-button.vue
index 3bcbe665bf..d267f30403 100644
--- a/packages/client/src/components/renote-button.vue
+++ b/packages/client/src/components/renote-button.vue
@@ -1,5 +1,6 @@
 <template>
-<button v-if="canRenote"
+<button
+	v-if="canRenote"
 	ref="buttonRef"
 	class="eddddedb _button canRenote"
 	@click="renote()"
@@ -12,8 +13,9 @@
 </button>
 </template>
 
-<script lang="ts">
-import { computed, defineComponent, ref } from 'vue';
+<script lang="ts" setup>
+import { computed, ref } from 'vue';
+import * as misskey from 'misskey-js';
 import XDetails from '@/components/users-tooltip.vue';
 import { pleaseLogin } from '@/scripts/please-login';
 import * as os from '@/os';
@@ -21,71 +23,55 @@ import { $i } from '@/account';
 import { useTooltip } from '@/scripts/use-tooltip';
 import { i18n } from '@/i18n';
 
-export default defineComponent({
-	props: {
-		count: {
-			type: Number,
-			required: true,
-		},
-		note: {
-			type: Object,
-			required: true,
-		},
-	},
+const props = defineProps<{
+	note: misskey.entities.Note;
+	count: number;
+}>();
 
-	setup(props) {
-		const buttonRef = ref<HTMLElement>();
+const buttonRef = ref<HTMLElement>();
 
-		const canRenote = computed(() => ['public', 'home'].includes(props.note.visibility) || props.note.userId === $i.id);
+const canRenote = computed(() => ['public', 'home'].includes(props.note.visibility) || props.note.userId === $i.id);
 
-		useTooltip(buttonRef, async (showing) => {
-			const renotes = await os.api('notes/renotes', {
-				noteId: props.note.id,
-				limit: 11
-			});
+useTooltip(buttonRef, async (showing) => {
+	const renotes = await os.api('notes/renotes', {
+		noteId: props.note.id,
+		limit: 11,
+	});
 
-			const users = renotes.map(x => x.user);
+	const users = renotes.map(x => x.user);
 
-			if (users.length < 1) return;
+	if (users.length < 1) return;
 
-			os.popup(XDetails, {
-				showing,
-				users,
-				count: props.count,
-				targetElement: buttonRef.value
-			}, {}, 'closed');
-		});
-
-		const renote = (viaKeyboard = false) => {
-			pleaseLogin();
-			os.popupMenu([{
-				text: i18n.ts.renote,
-				icon: 'fas fa-retweet',
-				action: () => {
-					os.api('notes/create', {
-						renoteId: props.note.id
-					});
-				}
-			}, {
-				text: i18n.ts.quote,
-				icon: 'fas fa-quote-right',
-				action: () => {
-					os.post({
-						renote: props.note,
-					});
-				}
-			}], buttonRef.value, {
-				viaKeyboard
-			});
-		};
-
-		return {
-			buttonRef,
-			canRenote,
-			renote,
-		};
-	},
+	os.popup(XDetails, {
+		showing,
+		users,
+		count: props.count,
+		targetElement: buttonRef.value,
+	}, {}, 'closed');
 });
+
+const renote = (viaKeyboard = false) => {
+	pleaseLogin();
+	os.popupMenu([{
+		text: i18n.ts.renote,
+		icon: 'fas fa-retweet',
+		action: () => {
+			os.api('notes/create', {
+				renoteId: props.note.id,
+			});
+		},
+	}, {
+		text: i18n.ts.quote,
+		icon: 'fas fa-quote-right',
+		action: () => {
+			os.post({
+				renote: props.note,
+			});
+		},
+	}], buttonRef.value, {
+		viaKeyboard,
+	});
+};
 </script>
 
 <style lang="scss" scoped>
diff --git a/packages/client/src/components/sparkle.vue b/packages/client/src/components/sparkle.vue
index 0545594218..db38864a3c 100644
--- a/packages/client/src/components/sparkle.vue
+++ b/packages/client/src/components/sparkle.vue
@@ -63,63 +63,51 @@
 </span>
 </template>
 
-<script lang="ts">
-import { defineComponent, onMounted, onUnmounted, ref } from 'vue';
-import * as os from '@/os';
+<script lang="ts" setup>
+import { onMounted, onUnmounted, ref } from 'vue';
 
-export default defineComponent({
-	setup() {
-		const particles = ref([]);
-		const el = ref<HTMLElement>();
-		const width = ref(0);
-		const height = ref(0);
-		const colors = ['#eb6f92', '#9ccfd8', '#f6c177', '#f6c177', '#ebbcba'];
-		let stop = false;
-		let ro: ResizeObserver | undefined;
+const particles = ref([]);
+const el = ref<HTMLElement>();
+const width = ref(0);
+const height = ref(0);
+const colors = ['#eb6f92', '#9ccfd8', '#f6c177', '#f6c177', '#f6c177'];
+let stop = false;
+let ro: ResizeObserver | undefined;
 
-		onMounted(() => {
-			ro = new ResizeObserver((entries, observer) => {
-				width.value = el.value?.offsetWidth + 64;
-				height.value = el.value?.offsetHeight + 64;
-			});
-			ro.observe(el.value);
-			const add = () => {
-				if (stop) return;
-				const x = (Math.random() * (width.value - 64));
-				const y = (Math.random() * (height.value - 64));
-				const sizeFactor = Math.random();
-				const particle = {
-					id: Math.random().toString(),
-					x,
-					y,
-					size: 0.2 + ((sizeFactor / 10) * 3),
-					dur: 1000 + (sizeFactor * 1000),
-					color: colors[Math.floor(Math.random() * colors.length)],
-				};
-				particles.value.push(particle);
-				window.setTimeout(() => {
-					particles.value = particles.value.filter(x => x.id !== particle.id);
-				}, particle.dur - 100);
-
-				window.setTimeout(() => {
-					add();
-				}, 500 + (Math.random() * 500));
-			};
-			add();
-		});
-
-		onUnmounted(() => {
-			if (ro) ro.disconnect();
-			stop = true;
-		});
-
-		return {
-			el,
-			width,
-			height,
-			particles,
+onMounted(() => {
+	ro = new ResizeObserver((entries, observer) => {
+		width.value = el.value?.offsetWidth + 64;
+		height.value = el.value?.offsetHeight + 64;
+	});
+	ro.observe(el.value);
+	const add = () => {
+		if (stop) return;
+		const x = (Math.random() * (width.value - 64));
+		const y = (Math.random() * (height.value - 64));
+		const sizeFactor = Math.random();
+		const particle = {
+			id: Math.random().toString(),
+			x,
+			y,
+			size: 0.2 + ((sizeFactor / 10) * 3),
+			dur: 1000 + (sizeFactor * 1000),
+			color: colors[Math.floor(Math.random() * colors.length)],
 		};
-	},
+		particles.value.push(particle);
+		window.setTimeout(() => {
+			particles.value = particles.value.filter(x => x.id !== particle.id);
+		}, particle.dur - 100);
+
+		window.setTimeout(() => {
+			add();
+		}, 500 + (Math.random() * 500));
+	};
+	add();
+});
+
+onUnmounted(() => {
+	if (ro) ro.disconnect();
+	stop = true;
 });
 </script>
 
diff --git a/packages/client/src/components/tab.vue b/packages/client/src/components/tab.vue
index c629727358..669e9e2e11 100644
--- a/packages/client/src/components/tab.vue
+++ b/packages/client/src/components/tab.vue
@@ -18,13 +18,13 @@ export default defineComponent({
 			disabled: this.modelValue === option.props.value,
 			onClick: () => {
 				this.$emit('update:modelValue', option.props.value);
-			}
+			},
 		}, option.children), [
-			[resolveDirective('click-anime')]
+			[resolveDirective('click-anime')],
 		]))), [
-			[resolveDirective('size'), { max: [500] }]
+			[resolveDirective('size'), { max: [500] }],
 		]);
-	}
+	},
 });
 </script>
 
diff --git a/packages/client/src/components/ui/button.vue b/packages/client/src/components/ui/button.vue
index e0994e8a12..7433e79788 100644
--- a/packages/client/src/components/ui/button.vue
+++ b/packages/client/src/components/ui/button.vue
@@ -141,7 +141,7 @@ export default defineComponent({
 	display: block;
 	min-width: 100px;
 	width: max-content;
-	padding: 8px 14px;
+	padding: 8px 16px;
 	text-align: center;
 	font-weight: normal;
 	font-size: 1em;
diff --git a/packages/client/src/pages/share.vue b/packages/client/src/pages/share.vue
index 6c3ce339c5..f4b6f66fa6 100644
--- a/packages/client/src/pages/share.vue
+++ b/packages/client/src/pages/share.vue
@@ -1,25 +1,24 @@
 <template>
-<div class="">
-	<section class="_section">
-		<div class="_content">
-			<XPostForm
-				v-if="state === 'writing'"
-				fixed
-				:instant="true"
-				:initial-text="initialText"
-				:initial-visibility="visibility"
-				:initial-files="files"
-				:initial-local-only="localOnly"
-				:reply="reply"
-				:renote="renote"
-				:initial-visible-users="visibleUsers"
-				class="_panel"
-				@posted="state = 'posted'"
-			/>
-			<MkButton v-else-if="state === 'posted'" primary class="close" @click="close()">{{ i18n.ts.close }}</MkButton>
-		</div>
-	</section>
-</div>
+<MkStickyContainer>
+	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
+	<MkSpacer :content-max="800">
+		<XPostForm
+			v-if="state === 'writing'"
+			fixed
+			:instant="true"
+			:initial-text="initialText"
+			:initial-visibility="visibility"
+			:initial-files="files"
+			:initial-local-only="localOnly"
+			:reply="reply"
+			:renote="renote"
+			:initial-visible-users="visibleUsers"
+			class="_panel"
+			@posted="state = 'posted'"
+		/>
+		<MkButton v-else-if="state === 'posted'" primary class="close" @click="close()">{{ i18n.ts.close }}</MkButton>
+	</MkSpacer>
+</MkStickyContainer>
 </template>
 
 <script lang="ts" setup>
diff --git a/packages/client/src/pages/tag.vue b/packages/client/src/pages/tag.vue
index 406eb1c988..950d26a72e 100644
--- a/packages/client/src/pages/tag.vue
+++ b/packages/client/src/pages/tag.vue
@@ -1,7 +1,10 @@
 <template>
-<div class="_section">
-	<XNotes class="_content" :pagination="pagination"/>
-</div>
+<MkStickyContainer>
+	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
+	<MkSpacer :content-max="800">
+		<XNotes class="_content" :pagination="pagination"/>
+	</MkSpacer>
+</MkStickyContainer>
 </template>
 
 <script lang="ts" setup>
diff --git a/packages/client/src/ui/universal.vue b/packages/client/src/ui/universal.vue
index e4b5de9918..0ef0da70b5 100644
--- a/packages/client/src/ui/universal.vue
+++ b/packages/client/src/ui/universal.vue
@@ -70,6 +70,7 @@ import { $i } from '@/account';
 import { Router } from '@/nirax';
 import { mainRouter } from '@/router';
 import { PageMetadata, provideMetadataReceiver, setPageMetadata } from '@/scripts/page-metadata';
+import { deviceKind } from '@/scripts/device-kind';
 const XWidgets = defineAsyncComponent(() => import('./universal.widgets.vue'));
 const XSidebar = defineAsyncComponent(() => import('@/ui/_common_/navbar.vue'));
 const XStatusBars = defineAsyncComponent(() => import('@/ui/_common_/statusbars.vue'));
@@ -77,10 +78,11 @@ const XStatusBars = defineAsyncComponent(() => import('@/ui/_common_/statusbars.
 const DESKTOP_THRESHOLD = 1100;
 const MOBILE_THRESHOLD = 500;
 
+// デスクトップでウィンドウを狭くしたときモバイルUIが表示されて欲しいことはあるので deviceKind === 'desktop' の判定は行わない
 const isDesktop = ref(window.innerWidth >= DESKTOP_THRESHOLD);
-const isMobile = ref(window.innerWidth <= MOBILE_THRESHOLD);
+const isMobile = ref(deviceKind === 'smartphone' || window.innerWidth <= MOBILE_THRESHOLD);
 window.addEventListener('resize', () => {
-	isMobile.value = window.innerWidth <= MOBILE_THRESHOLD;
+	isMobile.value = deviceKind === 'smartphone' || window.innerWidth <= MOBILE_THRESHOLD;
 });
 
 let pageMetadata = $ref<null | ComputedRef<PageMetadata>>();