refactor: extract display name into component

I could imagine that we will refactor this into even smaller components
in the future but for now, I bundle the pronoun with the display name
like this.

Signed-off-by: André Jaenisch <andre.jaenisch@posteo.de>

src/lib/components/atoms/DisplayName.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+	/**
+	 * Under which name shall the person be known?
+	 */
+	export let displayName: string = '';
+
+	/**
+	 * How to correctly address this person.
+	 */
+	export let pronoun: string = '';
+</script>
+
+<h1 class="h1 font-semibold text-4xl leading-tight">
+	<span class="sr-only">Profile for </span>
+	{@html displayName}
+</h1>
+<p class="leading-normal my-1">({@html pronoun})</p>

src/routes/profile/+page.svelte

@@ -2,6 +2,7 @@
 	import Avatar from '$lib/components/atoms/Avatar.svelte';
 	import BlockOrReport from '$lib/components/atoms/BlockOrReport.svelte';
 	import Created from '$lib/components/atoms/Created.svelte';
+	import DisplayName from '$lib/components/atoms/DisplayName.svelte';
 
 	/** @type {import('./$types').PageData} */
 	export let data;
@@ -26,11 +27,7 @@
 			<!-- Board -->
 			<div class="flex flex-col flex-1 gap-2">
 				<div class="flex items-end">
-					<h1 class="h1 font-semibold text-4xl leading-tight">
+					<DisplayName displayName={data.user.display_name} pronoun={data.user.pronoun} />
-						<span class="sr-only">Profile for </span>
-						{@html data.user.display_name}
-					</h1>
-					<p class="leading-normal my-1">(she/her)</p>
 				</div>
 				<span class="leading-tight">
 					{@html data.user.username}@{@html data.user.instance}

tests/components/atoms/DisplayName.test.ts

@@ -0,0 +1,20 @@
+import '@testing-library/jest-dom';
+import { render, screen } from '@testing-library/svelte';
+
+import DisplayName from '../../../src/lib/components/atoms/DisplayName.svelte';
+
+describe('DisplayName.svelte', () => {
+	it('should mount', () => {
+		// Arrange
+		const displayName = 'Jane Doe';
+		const pronoun = 'she/her';
+
+		// Act
+		render(DisplayName, { displayName, pronoun });
+
+		// Assert
+		expect(screen.getByText(displayName)).toBeInTheDocument();
+		// Turn into regular expression to respect round brackets
+		expect(screen.getByText(new RegExp(pronoun))).toBeInTheDocument();
+	});
+});