test(#10336): add components/Mk[D-E].* stories (#14118)

* test(storybook): add `components/Mk[D-E].*` stories

* fix: mock instance name

* fix: invalid `reactionAcceptance` value

* style: missing trailing commas

packages/frontend/src/components/MkEmojiPicker.stories.impl.ts

@@ -0,0 +1,54 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { action } from '@storybook/addon-actions';
+import { expect, userEvent, waitFor, within } from '@storybook/test';
+import { StoryObj } from '@storybook/vue3';
+import { i18n } from '@/i18n.js';
+import MkEmojiPicker from './MkEmojiPicker.vue';
+export const Default = {
+	render(args) {
+		return {
+			components: {
+				MkEmojiPicker,
+			},
+			setup() {
+				return {
+					args,
+				};
+			},
+			computed: {
+				props() {
+					return {
+						...this.args,
+					};
+				},
+				events() {
+					return {
+						chosen: action('chosen'),
+					};
+				},
+			},
+			template: '<MkEmojiPicker v-bind="props" v-on="events" />',
+		};
+	},
+	async play({ canvasElement }) {
+		const canvas = within(canvasElement);
+		const faceSection = canvas.getByText(/face/i);
+		await waitFor(() => userEvent.click(faceSection));
+		const grinning = canvasElement.querySelector('[data-emoji="😀"]');
+		await expect(grinning).toBeInTheDocument();
+		if (grinning == null) throw new Error(); // NOTE: not called
+		await waitFor(() => userEvent.click(grinning));
+		const recentUsedSection = canvas.getByText(new RegExp(i18n.ts.recentUsed)).parentElement;
+		await expect(recentUsedSection).toBeInTheDocument();
+		if (recentUsedSection == null) throw new Error(); // NOTE: not called
+		await expect(within(recentUsedSection).getByAltText('😀')).toBeInTheDocument();
+		await expect(within(recentUsedSection).queryByAltText('😬')).toEqual(null);
+	},
+	parameters: {
+		layout: 'centered',
+	},
+} satisfies StoryObj<typeof MkEmojiPicker>;