diff --git a/packages/client/src/components/global/page-header.vue b/packages/client/src/components/global/page-header.vue
index 12123474d..adb586ccd 100644
--- a/packages/client/src/components/global/page-header.vue
+++ b/packages/client/src/components/global/page-header.vue
@@ -27,7 +27,25 @@
 	</template>
 	<div class="buttons right">
 		<template v-for="action in actions">
-			<button v-tooltip="action.text" class="_button button" :class="{ highlighted: action.highlighted }" @click.stop="action.handler" @touchstart="preventDrag"><i :class="action.icon"></i></button>
+			<MkButton
+				v-if="action.asFullButton"
+				class="fullButton"
+				primary
+				@click.stop="action.handler"
+			>
+				<i :class="action.icon"></i>
+				{{ action.text }}
+			</MkButton>
+			<button
+				v-else
+				v-tooltip="action.text"
+				class="_button button"
+				:class="{ highlighted: action.highlighted }"
+				@click.stop="action.handler"
+				@touchstart="preventDrag"
+			>
+				<i :class="action.icon"></i>
+			</button>
 		</template>
 	</div>
 </div>
@@ -55,6 +73,7 @@ const props = withDefaults(defineProps<{
 	actions?: {
 		text: string;
 		icon: string;
+		asFullButton?: boolean;
 		handler: (ev: MouseEvent) => void;
 	}[];
 	thin?: boolean;
diff --git a/packages/client/src/pages/admin/_header_.vue b/packages/client/src/pages/admin/_header_.vue
deleted file mode 100644
index 14098e5f1..000000000
--- a/packages/client/src/pages/admin/_header_.vue
+++ /dev/null
@@ -1,287 +0,0 @@
-<template>
-<div ref="el" class="fdidabkc" :style="{ background: bg }" @click="onClick">
-	<template v-if="metadata">
-		<div class="titleContainer" @click="showTabsPopup">
-			<i v-if="metadata.icon" class="icon" :class="metadata.icon"></i>
-
-			<div class="title">
-				<div class="title">{{ metadata.title }}</div>
-			</div>
-		</div>
-		<div class="tabs">
-			<button v-for="tab in tabs" :ref="(el) => tabRefs[tab.key] = el" v-tooltip="tab.title" class="tab _button" :class="{ active: tab.key != null && tab.key === props.tab }" @mousedown="() => onTabMousedown(tab)" @click="(ev) => onTabClick(tab, ev)">
-				<i v-if="tab.icon" class="icon" :class="tab.icon"></i>
-				<span v-if="!tab.iconOnly" class="title">{{ tab.title }}</span>
-			</button>
-			<div ref="tabHighlightEl" class="highlight"></div>
-		</div>
-	</template>
-	<div class="buttons right">
-		<template v-for="action in actions">
-			<MkButton v-if="action.asFullButton" class="fullButton" primary @click.stop="action.handler"><i :class="action.icon" style="margin-right: 6px;"></i>{{ action.text }}</MkButton>
-			<button v-else v-tooltip="action.text" class="_button button" :class="{ highlighted: action.highlighted }" @click.stop="action.handler" @touchstart="preventDrag"><i :class="action.icon"></i></button>
-		</template>
-	</div>
-</div>
-</template>
-
-<script lang="ts" setup>
-import { computed, onMounted, onUnmounted, ref, watch, nextTick } from 'vue';
-import tinycolor from 'tinycolor2';
-import { popupMenu } from '@/os';
-import { scrollToTop } from '@/scripts/scroll';
-import MkButton from '@/components/ui/button.vue';
-import { globalEvents } from '@/events';
-import { injectPageMetadata } from '@/scripts/page-metadata';
-
-type Tab = {
-	key?: string | null;
-	title: string;
-	icon?: string;
-	iconOnly?: boolean;
-	onClick?: (ev: MouseEvent) => void;
-};
-
-const props = withDefaults(defineProps<{
-	tabs?: Tab[];
-	tab?: string;
-	actions?: {
-		text: string;
-		icon: string;
-		asFullButton?: boolean;
-		handler: (ev: MouseEvent) => void;
-	}[];
-}>(), {
-	actions: () => [],
-	tabs: () => [],
-});
-
-const emit = defineEmits<{
-	(ev: 'update:tab', key: string);
-}>();
-
-const metadata = injectPageMetadata();
-
-const el = ref<HTMLElement>(null);
-const tabRefs = {};
-const tabHighlightEl = $ref<HTMLElement | null>(null);
-const bg = ref(null);
-const hasTabs = computed(() => props.tabs.length > 0);
-
-const showTabsPopup = (ev: MouseEvent) => {
-	if (!hasTabs.value) return;
-	ev.preventDefault();
-	ev.stopPropagation();
-	const menu = props.tabs.map(tab => ({
-		text: tab.title,
-		icon: tab.icon,
-		active: tab.key != null && tab.key === props.tab,
-		action: (ev) => {
-			onTabClick(tab, ev);
-		},
-	}));
-	popupMenu(menu, ev.currentTarget ?? ev.target);
-};
-
-const preventDrag = (ev: TouchEvent) => {
-	ev.stopPropagation();
-};
-
-const onClick = () => {
-	scrollToTop(el.value, { behavior: 'smooth' });
-};
-
-function onTabMousedown(tab: Tab): void {
-	// ユーザビリティの観点からmousedown時にはonClickは呼ばない
-	if (tab.key) {
-		emit('update:tab', tab.key);
-	}
-}
-
-function onTabClick(tab: Tab, ev: MouseEvent): void {
-	if (tab.onClick) {
-		ev.preventDefault();
-		ev.stopPropagation();
-		tab.onClick(ev);
-	}
-	if (tab.key) {
-		emit('update:tab', tab.key);
-	}
-}
-
-const calcBg = () => {
-	const rawBg = metadata?.bg || 'var(--bg)';
-	const tinyBg = tinycolor(rawBg.startsWith('var(') ? getComputedStyle(document.documentElement).getPropertyValue(rawBg.slice(4, -1)) : rawBg);
-	tinyBg.setAlpha(0.85);
-	bg.value = tinyBg.toRgbString();
-};
-
-onMounted(() => {
-	calcBg();
-	globalEvents.on('themeChanged', calcBg);
-
-	watch(() => [props.tab, props.tabs], () => {
-		nextTick(() => {
-			const tabEl = tabRefs[props.tab];
-			if (tabEl && tabHighlightEl) {
-				// offsetWidth や offsetLeft は少数を丸めてしまうため getBoundingClientRect を使う必要がある
-				// https://developer.mozilla.org/ja/docs/Web/API/HTMLElement/offsetWidth#%E5%80%A4
-				const parentRect = tabEl.parentElement.getBoundingClientRect();
-				const rect = tabEl.getBoundingClientRect();
-				tabHighlightEl.style.width = rect.width + 'px';
-				tabHighlightEl.style.left = (rect.left - parentRect.left) + 'px';
-			}
-		});
-	}, {
-		immediate: true,
-	});
-});
-
-onUnmounted(() => {
-	globalEvents.off('themeChanged', calcBg);
-});
-</script>
-
-<style lang="scss" scoped>
-.fdidabkc {
-	--height: 60px;
-	display: flex;
-	width: 100%;
-	-webkit-backdrop-filter: var(--blur, blur(15px));
-	backdrop-filter: var(--blur, blur(15px));
-
-	> .buttons {
-		--margin: 8px;
-		display: flex;
-    align-items: center;
-		height: var(--height);
-		margin: 0 var(--margin);
-
-		&.right {
-			margin-left: auto;
-		}
-
-		&:empty {
-			width: var(--height);
-		}
-
-		> .button {
-			display: flex;
-			align-items: center;
-			justify-content: center;
-			height: calc(var(--height) - (var(--margin) * 2));
-			width: calc(var(--height) - (var(--margin) * 2));
-			box-sizing: border-box;
-			position: relative;
-			border-radius: 5px;
-
-			&:hover {
-				background: rgba(0, 0, 0, 0.05);
-			}
-
-			&.highlighted {
-				color: var(--accent);
-			}
-		}
-
-		> .fullButton {
-			& + .fullButton {
-				margin-left: 12px;
-			}
-		}
-	}
-
-	> .titleContainer {
-		display: flex;
-		align-items: center;
-		max-width: 400px;
-		overflow: auto;
-		white-space: nowrap;
-		text-align: left;
-		font-weight: bold;
-		flex-shrink: 0;
-		margin-left: 24px;
-
-		> .avatar {
-			$size: 32px;
-			display: inline-block;
-			width: $size;
-			height: $size;
-			vertical-align: bottom;
-			margin: 0 8px;
-			pointer-events: none;
-		}
-
-		> .icon {
-			margin-right: 8px;
-			width: 16px;
-			text-align: center;
-		}
-
-		> .title {
-			min-width: 0;
-			overflow: hidden;
-			text-overflow: ellipsis;
-			white-space: nowrap;
-			line-height: 1.1;
-
-			> .subtitle {
-				opacity: 0.6;
-				font-size: 0.8em;
-				font-weight: normal;
-				white-space: nowrap;
-				overflow: hidden;
-				text-overflow: ellipsis;
-
-				&.activeTab {
-					text-align: center;
-
-					> .chevron {
-						display: inline-block;
-						margin-left: 6px;
-					}
-				}
-			}
-		}
-	}
-
-	> .tabs {
-		position: relative;
-		margin-left: 16px;
-		font-size: 0.8em;
-		overflow: auto;
-		white-space: nowrap;
-
-		> .tab {
-			display: inline-block;
-			position: relative;
-			padding: 0 10px;
-			height: 100%;
-			font-weight: normal;
-			opacity: 0.7;
-
-			&:hover {
-				opacity: 1;
-			}
-
-			&.active {
-				opacity: 1;
-			}
-
-			> .icon + .title {
-				margin-left: 8px;
-			}
-		}
-
-		> .highlight {
-			position: absolute;
-			bottom: 0;
-			height: 3px;
-			background: var(--accent);
-			border-radius: 999px;
-			transition: all 0.2s ease;
-			pointer-events: none;
-		}
-	}
-}
-</style>
diff --git a/packages/client/src/pages/admin/abuses.vue b/packages/client/src/pages/admin/abuses.vue
index e8034814b..565e80d55 100644
--- a/packages/client/src/pages/admin/abuses.vue
+++ b/packages/client/src/pages/admin/abuses.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader/></template>
+	<template #header><MkPageHeader/></template>
 	<MkSpacer :content-max="900">
 		<div class="lcixvhis">
 			<div class="_section reports">
@@ -39,7 +39,6 @@
 <script lang="ts" setup>
 import { computed } from 'vue';
 
-import XHeader from './_header_.vue';
 import MkSelect from '@/components/form/select.vue';
 import MkPagination from '@/components/ui/pagination.vue';
 import XAbuseReport from '@/components/abuse-report.vue';
diff --git a/packages/client/src/pages/admin/announcements.vue b/packages/client/src/pages/admin/announcements.vue
index 7cf7b73c1..8b5acdbf7 100644
--- a/packages/client/src/pages/admin/announcements.vue
+++ b/packages/client/src/pages/admin/announcements.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="headerActions"/></template>
+	<template #header><MkPageHeader :actions="headerActions"/></template>
 	<MkSpacer :content-max="900">
 		<div class="ztgjmzrw">
 			<section v-for="announcement in announcements" class="_card _gap announcements">
@@ -27,7 +27,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import MkButton from '@/components/ui/button.vue';
 import MkInput from '@/components/form/input.vue';
 import MkTextarea from '@/components/form/textarea.vue';
diff --git a/packages/client/src/pages/admin/email-settings.vue b/packages/client/src/pages/admin/email-settings.vue
index 4cefe4b57..d25de2f14 100644
--- a/packages/client/src/pages/admin/email-settings.vue
+++ b/packages/client/src/pages/admin/email-settings.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="headerActions"/></template>
+	<template #header><MkPageHeader :actions="headerActions"/></template>
 	<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 		<FormSuspense :p="init">
 			<div class="_formRoot">
@@ -46,7 +46,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import FormSwitch from '@/components/form/switch.vue';
 import FormInput from '@/components/form/input.vue';
 import FormInfo from '@/components/ui/info.vue';
diff --git a/packages/client/src/pages/admin/emojis.vue b/packages/client/src/pages/admin/emojis.vue
index f88dabdf9..ee1bc00cc 100644
--- a/packages/client/src/pages/admin/emojis.vue
+++ b/packages/client/src/pages/admin/emojis.vue
@@ -1,7 +1,7 @@
 <template>
 <div>
 	<MkStickyContainer>
-		<template #header><XHeader v-model:tab="tab" :actions="headerActions" :tabs="headerTabs"/></template>
+		<template #header><MkPageHeader v-model:tab="tab" :actions="headerActions" :tabs="headerTabs"/></template>
 		<MkSpacer :content-max="900">
 			<div class="ogwlenmc">
 				<div v-if="tab === 'local'" class="local">
@@ -69,7 +69,6 @@
 
 <script lang="ts" setup>
 import { computed, defineAsyncComponent, ref } from 'vue';
-import XHeader from './_header_.vue';
 import MkButton from '@/components/ui/button.vue';
 import MkInput from '@/components/form/input.vue';
 import MkPagination from '@/components/ui/pagination.vue';
diff --git a/packages/client/src/pages/admin/federation.vue b/packages/client/src/pages/admin/federation.vue
index cf6922464..e83bb8d69 100644
--- a/packages/client/src/pages/admin/federation.vue
+++ b/packages/client/src/pages/admin/federation.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="[]" :tabs="[]"/></template>
+	<template #header><MkPageHeader/></template>
 	<MkSpacer :content-max="900">
 		<XFederation/>
 	</MkSpacer>
@@ -8,7 +8,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
 import XFederation from '@/components/federation.vue';
diff --git a/packages/client/src/pages/admin/files.vue b/packages/client/src/pages/admin/files.vue
index c950557d9..e7ecff074 100644
--- a/packages/client/src/pages/admin/files.vue
+++ b/packages/client/src/pages/admin/files.vue
@@ -1,7 +1,7 @@
 <template>
 <div>
 	<MkStickyContainer>
-		<template #header><XHeader :actions="headerActions"/></template>
+		<template #header><MkPageHeader :actions="headerActions"/></template>
 		<MkSpacer :content-max="900">
 			<div class="xrmjdkdw">
 				<div>
@@ -34,7 +34,6 @@
 
 <script lang="ts" setup>
 import { computed } from 'vue';
-import XHeader from './_header_.vue';
 import MkInput from '@/components/form/input.vue';
 import MkSelect from '@/components/form/select.vue';
 import MkFileListForAdmin from '@/components/file-list-for-admin.vue';
diff --git a/packages/client/src/pages/admin/instance-block.vue b/packages/client/src/pages/admin/instance-block.vue
index f4b34355b..08d74c3e5 100644
--- a/packages/client/src/pages/admin/instance-block.vue
+++ b/packages/client/src/pages/admin/instance-block.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader/></template>
+	<template #header><MkPageHeader/></template>
 	<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 		<FormSuspense :p="init">
 			<FormTextarea v-model="blockedHosts" class="_formBlock">
@@ -15,7 +15,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import FormButton from '@/components/ui/button.vue';
 import FormTextarea from '@/components/form/textarea.vue';
 import FormSuspense from '@/components/form/suspense.vue';
diff --git a/packages/client/src/pages/admin/object-storage.vue b/packages/client/src/pages/admin/object-storage.vue
index 3156e54a0..acd3b10e2 100644
--- a/packages/client/src/pages/admin/object-storage.vue
+++ b/packages/client/src/pages/admin/object-storage.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="headerActions"/></template>
+	<template #header><MkPageHeader :actions="headerActions"/></template>
 	<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 		<FormSuspense :p="init">
 			<div class="_formRoot">
@@ -69,7 +69,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import FormSwitch from '@/components/form/switch.vue';
 import FormInput from '@/components/form/input.vue';
 import FormSuspense from '@/components/form/suspense.vue';
diff --git a/packages/client/src/pages/admin/queue.vue b/packages/client/src/pages/admin/queue.vue
index 7f7b5785e..2acdb737a 100644
--- a/packages/client/src/pages/admin/queue.vue
+++ b/packages/client/src/pages/admin/queue.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="headerActions"/></template>
+	<template #header><MkPageHeader :actions="headerActions"/></template>
 	<MkSpacer :content-max="800">
 		<XQueue :connection="connection" domain="inbox">
 			<template #title>In</template>
@@ -16,7 +16,6 @@
 <script lang="ts" setup>
 import { markRaw, onMounted, onBeforeUnmount, nextTick } from 'vue';
 import XQueue from './queue.chart.vue';
-import XHeader from './_header_.vue';
 import MkButton from '@/components/ui/button.vue';
 import * as os from '@/os';
 import { stream } from '@/stream';
diff --git a/packages/client/src/pages/admin/relays.vue b/packages/client/src/pages/admin/relays.vue
index f5ae5a98c..12cfda4f5 100644
--- a/packages/client/src/pages/admin/relays.vue
+++ b/packages/client/src/pages/admin/relays.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="headerActions"/></template>
+	<template #header><MkPageHeader :actions="headerActions"/></template>
 	<MkSpacer :content-max="800">
 		<div v-for="relay in relays" :key="relay.inbox" class="relaycxt _panel _block" style="padding: 16px;">
 			<div>{{ relay.inbox }}</div>
@@ -17,7 +17,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import MkButton from '@/components/ui/button.vue';
 import * as os from '@/os';
 import { i18n } from '@/i18n';
diff --git a/packages/client/src/pages/admin/security.vue b/packages/client/src/pages/admin/security.vue
index 672bea218..08759d690 100644
--- a/packages/client/src/pages/admin/security.vue
+++ b/packages/client/src/pages/admin/security.vue
@@ -1,6 +1,6 @@
 <template>
 <MkStickyContainer>
-	<template #header><XHeader/></template>
+	<template #header><MkPageHeader/></template>
 	<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 		<FormSuspense :p="init">
 			<div class="_formRoot">
@@ -34,7 +34,6 @@
 
 <script lang="ts" setup>
 import XBotProtection from './bot-protection.vue';
-import XHeader from './_header_.vue';
 import FormFolder from '@/components/form/folder.vue';
 import FormSwitch from '@/components/form/switch.vue';
 import FormInfo from '@/components/ui/info.vue';
diff --git a/packages/client/src/pages/admin/settings.vue b/packages/client/src/pages/admin/settings.vue
index 7c3706f6e..fd5d6d5a2 100644
--- a/packages/client/src/pages/admin/settings.vue
+++ b/packages/client/src/pages/admin/settings.vue
@@ -1,7 +1,7 @@
 <template>
 <div>
 	<MkStickyContainer>
-		<template #header><XHeader :actions="headerActions"/></template>
+		<template #header><MkPageHeader :actions="headerActions"/></template>
 		<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 			<FormSuspense :p="init">
 				<div class="_formRoot">
@@ -148,7 +148,6 @@
 </template>
 
 <script lang="ts" setup>
-import XHeader from './_header_.vue';
 import FormSwitch from '@/components/form/switch.vue';
 import FormInput from '@/components/form/input.vue';
 import FormTextarea from '@/components/form/textarea.vue';
diff --git a/packages/client/src/pages/admin/users.vue b/packages/client/src/pages/admin/users.vue
index 6fe4ad761..88d5cbacd 100644
--- a/packages/client/src/pages/admin/users.vue
+++ b/packages/client/src/pages/admin/users.vue
@@ -1,7 +1,7 @@
 <template>
 <div>
 	<MkStickyContainer>
-		<template #header><XHeader :actions="headerActions"/></template>
+		<template #header><MkPageHeader :actions="headerActions"/></template>
 		<MkSpacer :content-max="900">
 			<div class="lknzcolw">
 				<div class="users">
@@ -54,7 +54,6 @@
 
 <script lang="ts" setup>
 import { computed } from 'vue';
-import XHeader from './_header_.vue';
 import MkInput from '@/components/form/input.vue';
 import MkSelect from '@/components/form/select.vue';
 import MkPagination from '@/components/ui/pagination.vue';