add unread count to thread title in topic view and thread view

app/routes/threads.py

@@ -54,12 +54,14 @@ def thread(slug):
     other_topics = Topics.select()
 
     is_subscribed = False
+    unread_count = None
     if is_logged_in():
         subscription = Subscriptions.find({
             'thread_id': thread.id,
             'user_id': get_active_user().id,
         })
         if subscription:
+            unread_count = subscription.get_unread_count()
             if int(posts[-1]['created_at']) > int(subscription.last_seen):
                 subscription.update({
                     'last_seen': int(posts[-1]['created_at'])
@@ -76,6 +78,7 @@ def thread(slug):
         topics = other_topics,
         is_subscribed = is_subscribed,
         Reactions = Reactions,
+        unread_count = unread_count,
     )