Enhance(frontend): MFMや絵文字が使える入力ボックスでオートコンプリートを使えるように (#12643)

* rich autocomplete for use in profiles, announcements, and channel descriptions

* implementation omissions

* add tab, apply to page editor, and fix something

* componentization

* fix nyaize doesn't working in profile preview

* detach autocomplete instance when unmounted

* fix: mismatched camelCase

* remove unused / unnecessary styles

* update CHANGELOG.md

* fix lint

* remove dump.rdb

* props.richAutocomplete -> autocomplete

* Update packages/frontend/src/scripts/autocomplete.ts

* clarify namings
メンションなども「MFM」に含まれるのか自信がなかったのでrichSyntaxなどとぼかしていましたが、含むようなので変更しました

* tweak

* Update MkFormDialog.vue

* rename

---------

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

packages/frontend/src/pages/page-editor/els/page-editor.el.text.vue

@@ -9,16 +9,17 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<template #header><i class="ti ti-align-left"></i> {{ i18n.ts._pages.blocks.text }}</template>
 
 	<section>
-		<textarea v-model="text" :class="$style.textarea"></textarea>
+		<textarea ref="inputEl" v-model="text" :class="$style.textarea"></textarea>
 	</section>
 </XContainer>
 </template>
 
 <script lang="ts" setup>
 /* eslint-disable vue/no-mutating-props */
-import { watch, ref } from 'vue';
+import { watch, ref, shallowRef, onMounted, onUnmounted } from 'vue';
 import XContainer from '../page-editor.container.vue';
 import { i18n } from '@/i18n.js';
+import { Autocomplete } from '@/scripts/autocomplete.js';
 
 const props = defineProps<{
 	modelValue: any
@@ -28,7 +29,10 @@ const emit = defineEmits<{
 	(ev: 'update:modelValue', value: any): void;
 }>();
 
+let autocomplete: Autocomplete;
+
 const text = ref(props.modelValue.text ?? '');
+const inputEl = shallowRef<HTMLTextAreaElement | null>(null);
 
 watch(text, () => {
 	emit('update:modelValue', {
@@ -36,6 +40,14 @@ watch(text, () => {
 		text: text.value,
 	});
 });
+
+onMounted(() => {
+	autocomplete = new Autocomplete(inputEl.value, text);
+});
+
+onUnmounted(() => {
+	autocomplete.detach();
+});
 </script>
 
 <style lang="scss" module>