enhance(frontend): フォロワーへのメッセージ欄を改良 (#14656)

* enhance(frontend): フォロワーへのメッセージ欄を改良

* Update Changelog

2 files changed, 117 insertions, 4 deletions

diff --git a/packages/frontend/src/components/MkFukidashi.vue b/packages/frontend/src/components/MkFukidashi.vue
new file mode 100644
index 0000000000..ba82eb442f
--- /dev/null
+++ b/packages/frontend/src/components/MkFukidashi.vue
@@ -0,0 +1,100 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div
+	:class="[
+		$style.root,
+		tail === 'left' ? $style.left : $style.right,
+		negativeMargin === true && $style.negativeMergin,
+		shadow === true && $style.shadow,
+	]"
+>
+	<div :class="$style.bg">
+		<svg v-if="tail !== 'none'" :class="$style.tail" version="1.1" viewBox="0 0 14.597 14.58" xmlns="http://www.w3.org/2000/svg">
+			<g transform="translate(-173.71 -87.184)">
+				<path d="m188.19 87.657c-1.469 2.3218-3.9315 3.8312-6.667 4.0865-2.2309-1.7379-4.9781-2.6816-7.8061-2.6815h-5.1e-4v12.702h12.702v-5.1e-4c2e-5 -1.9998-0.47213-3.9713-1.378-5.754 2.0709-1.6834 3.2732-4.2102 3.273-6.8791-6e-5 -0.49375-0.0413-0.98662-0.1235-1.4735z" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round" stroke-width=".33225" style="paint-order:stroke fill markers"/>
+			</g>
+		</svg>
+		<div :class="$style.content">
+			<slot></slot>
+		</div>
+	</div>
+</div>
+</template>
+
+<script setup lang="ts">
+withDefaults(defineProps<{
+	tail?: 'left' | 'right' | 'none';
+	negativeMargin?: boolean;
+	shadow?: boolean;
+}>(), {
+	tail: 'right',
+	negativeMargin: false,
+	shadow: false,
+});
+</script>
+
+<style module lang="scss">
+.root {
+	--fukidashi-radius: var(--radius);
+	--fukidashi-bg: var(--panel);
+
+	position: relative;
+	display: inline-block;
+	min-height: calc(var(--fukidashi-radius) * 2);
+	padding-top: calc(var(--fukidashi-radius) * .13);
+
+	&.shadow {
+		filter: drop-shadow(0 4px 32px var(--shadow));
+	}
+
+	&.left {
+		padding-left: calc(var(--fukidashi-radius) * .13);
+
+		&.negativeMergin {
+			margin-left: calc(calc(var(--fukidashi-radius) * .13) * -1);
+		}
+	}
+
+	&.right {
+		padding-right: calc(var(--fukidashi-radius) * .13);
+
+		&.negativeMergin {
+			margin-right: calc(calc(var(--fukidashi-radius) * .13) * -1);
+		}
+	}
+}
+
+.bg {
+	width: 100%;
+	height: 100%;
+	background: var(--fukidashi-bg);
+	border-radius: var(--fukidashi-radius);
+}
+
+.content {
+	position: relative;
+	padding: 8px 12px;
+}
+
+.tail {
+	position: absolute;
+	top: 0;
+	display: block;
+	width: calc(var(--fukidashi-radius) * 1.13);
+	height: auto;
+	fill: var(--fukidashi-bg);
+}
+
+.left .tail {
+	left: 0;
+	transform: rotateY(180deg);
+}
+
+.right .tail {
+	right: 0;
+}
+</style>
diff --git a/packages/frontend/src/pages/user/home.vue b/packages/frontend/src/pages/user/home.vue
index ae8ac88361..93af534a9b 100644
--- a/packages/frontend/src/pages/user/home.vue
+++ b/packages/frontend/src/pages/user/home.vue
@@ -48,9 +48,10 @@ SPDX-License-Identifier: AGPL-3.0-only
 						</div>
 					</div>
 					<div v-if="user.followedMessage != null" class="followedMessage">
-						<div style="border: solid 1px var(--love); border-radius: 6px; background: color-mix(in srgb, var(--love), transparent 90%); padding: 6px 8px;">
-							<Mfm :text="user.followedMessage" :author="user"/>
-						</div>
+						<MkFukidashi class="fukidashi" :tail="narrow ? 'none' : 'left'" negativeMargin shadow>
+							<div class="messageHeader">{{ i18n.ts.messageToFollower }}</div>
+							<div><Mfm :text="user.followedMessage" :author="user"/></div>
+						</MkFukidashi>
 					</div>
 					<div v-if="user.roles.length > 0" class="roles">
 						<span v-for="role in user.roles" :key="role.id" v-tooltip="role.description" class="role" :style="{ '--color': role.color }">
@@ -161,6 +162,7 @@ import * as Misskey from 'misskey-js';
 import MkNote from '@/components/MkNote.vue';
 import MkFollowButton from '@/components/MkFollowButton.vue';
 import MkAccountMoved from '@/components/MkAccountMoved.vue';
+import MkFukidashi from '@/components/MkFukidashi.vue';
 import MkRemoteCaution from '@/components/MkRemoteCaution.vue';
 import MkTextarea from '@/components/MkTextarea.vue';
 import MkOmit from '@/components/MkOmit.vue';
@@ -467,7 +469,18 @@ onUnmounted(() => {
 
 				> .followedMessage {
 					padding: 24px 24px 0 154px;
-					font-size: 0.9em;
+
+					> .fukidashi {
+						display: block;
+						--fukidashi-bg: color-mix(in srgb, var(--love), var(--panel) 85%);
+						--fukidashi-radius: 16px;
+						font-size: 0.9em;
+
+						.messageHeader {
+							opacity: 0.7;
+							font-size: 0.85em;
+						}
+					}
 				}
 
 				> .roles {