Improve MFM parser (#3337)

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* Refactor

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* Refactor

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* Clean up

* Update misskey-flavored-markdown.ts

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* Update parser.ts

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* Add new test

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* Add new test

* Add new test

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* Refactor

* Update parse.ts

* Refactor

* Update parser.ts

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src/client/app/mobile/views/pages/user.vue

@@ -20,7 +20,7 @@
 					<span class="followed" v-if="user.isFollowed">{{ $t('follows-you') }}</span>
 				</div>
 				<div class="description">
-					<misskey-flavored-markdown v-if="user.description" :text="user.description" :i="$store.state.i"/>
+					<misskey-flavored-markdown v-if="user.description" :text="user.description" :author="user" :i="$store.state.i"/>
 				</div>
 				<div class="info">
 					<p class="location" v-if="user.host === null && user.profile.location">