feat: refine announcement (#11497)

* wip

* Update read-announcement.ts

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* Update index.d.ts

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* Create 1691649257651-refine-announcement.js

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* Update announcements.vue

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* Update announcements.vue

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* Update announcements.vue

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* Update misskey-js.api.md

* Update users.ts

* Create MkAnnouncementDialog.stories.impl.ts

* wip

* wip

* Create AnnouncementService.ts

packages/frontend/src/pages/emoji-edit-dialog.vue

@@ -63,7 +63,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				</MkFolder>
 				<MkSwitch v-model="isSensitive">isSensitive</MkSwitch>
 				<MkSwitch v-model="localOnly">{{ i18n.ts.localOnly }}</MkSwitch>
-				<MkButton danger @click="del()"><i class="ti ti-trash"></i> {{ i18n.ts.delete }}</MkButton>
+				<MkButton v-if="emoji" danger @click="del()"><i class="ti ti-trash"></i> {{ i18n.ts.delete }}</MkButton>
 			</div>
 		</MkSpacer>
 		<div :class="$style.footer">