show expiry only if available

src/components/user_card/user_card.js

@@ -159,11 +159,17 @@ export default {
     supportsNote () {
       return 'note' in this.relationship
     },
+    muteExpiryAvailable () {
+      return this.user.mute_expires_at !== undefined
+    },
     muteExpiry () {
       return this.user.mute_expires_at == null
         ? this.$t('user_card.mute_expires_forever')
         : this.$t('user_card.mute_expires_at', [new Date(this.user.mute_expires_at).toLocaleString()])
     },
+    blockExpiryAvailable () {
+      return this.user.block_expires_at !== undefined
+    },
     blockExpiry () {
       return this.user.block_expires_at == null
         ? this.$t('user_card.block_expires_forever')

src/components/user_card/user_card.vue

@@ -137,13 +137,13 @@
                 />
               </span>
               <span
-                v-if="relationship.muting"
+                v-if="relationship.muting && muteExpiryAvailable"
                 class="alert neutral user-role"
               >
                 {{ muteExpiry }}
               </span>
               <span
-                v-if="relationship.blocking"
+                v-if="relationship.blocking && blockExpiryAvailable"
                 class="alert neutral user-role"
               >
                 {{ blockExpiry }}