fix: make german translation more consistent, fix typos (#499)

components/notification/NotificationCard.vue

@@ -32,7 +32,7 @@ const { notification } = defineProps<{
           :content="getDisplayName(notification.account, { rich: true })"
           :emojis="notification.account.emojis"
         />
-        <span>signed up</span>
+        <span>{{ $t("notification.signed_up") }}</span>
       </div>
     </template>
     <template v-else-if="notification.type === 'follow_request'">

components/search/SearchWidget.vue

@@ -64,7 +64,7 @@ const activate = () => {
         bg-transparent
         outline="focus:none"
         pr-4
-        :placeholder="`${t('nav_side.search')} Elk`"
+        :placeholder="t('nav_side.search', ['Elk'])"
         pb="1px"
         placeholder-text-secondary
         @keydown.down.prevent="shift(1)"