feat: condense acct (#10753)

* feat: condense acct

* fix: watch parent element size

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/components/global/MkCondensedLine.vue

@@ -0,0 +1,56 @@
+<template>
+<span :class="$style.container">
+	<span ref="content" :class="$style.content">
+		<slot/>
+	</span>
+</span>
+</template>
+
+<script lang="ts">
+const contentSymbol = Symbol();
+const observer = new ResizeObserver((entries) => {
+	for (const entry of entries) {
+		const content = (entry.target[contentSymbol] ? entry.target : entry.target.firstElementChild) as HTMLSpanElement;
+		const container = content.parentElement as HTMLSpanElement;
+		const contentWidth = content.getBoundingClientRect().width;
+		const containerWidth = container.getBoundingClientRect().width;
+		container.style.transform = `scaleX(${Math.min(1, containerWidth / contentWidth)})`;
+	}
+});
+</script>
+
+<script setup lang="ts">
+import { ref, watch } from 'vue';
+
+const content = ref<HTMLSpanElement>();
+
+watch(content, (value, oldValue) => {
+	if (oldValue) {
+		delete oldValue[contentSymbol];
+		observer.unobserve(oldValue);
+		if (oldValue.parentElement) {
+			observer.unobserve(oldValue.parentElement);
+		}
+	}
+	if (value) {
+		value[contentSymbol] = contentSymbol;
+		observer.observe(value);
+		if (value.parentElement) {
+			observer.observe(value.parentElement);
+		}
+	}
+});
+</script>
+
+<style module lang="scss">
+.container {
+	display: inline-block;
+	width: 100%;
+	transform-origin: 0;
+}
+
+.content {
+	display: inline-block;
+	white-space: nowrap;
+}
+</style>