a11y

src/components/notification/notification.vue

@@ -154,6 +154,7 @@
             <button
               class="button-unstyled expand-icon"
               @click.prevent="toggleStatusExpanded"
+              :title="$t('tool_tip.toggle_expand')"
             >
               <FAIcon
                 class="fa-scale-110"
@@ -176,6 +177,7 @@
           <button
             v-if="needMute"
             class="button-unstyled"
+            :title="$t('tool_tip.toggle_mute')"
             @click.prevent="toggleMute"
           >
             <FAIcon

src/i18n/en.json

@@ -986,7 +986,9 @@
     "user_settings": "User Settings",
     "accept_follow_request": "Accept follow request",
     "reject_follow_request": "Reject follow request",
-    "bookmark": "Bookmark"
+    "bookmark": "Bookmark",
+    "toggle_expand": "Expand or collapse notification to show post in full",
+    "toggle_mute": "Expand or collapse notification to reveal muted content"
   },
   "upload": {
     "error": {