Adjust to new rocket-based backend

src/lib/pug/message-flash.html

@@ -1,12 +1,8 @@
-{% with messages = get_flashed_messages(with_categories=true) %}
-  {% if messages %}
-    {% for category, message in messages %}
-      <div class="alert alert-{{ category }} alert-dismissible fade show" role="alert">
-        {{ message }}
-        <button type="button" class="close" data-dismiss="alert" aria-label="Close">
+{{#if flash}}
+  <div class="alert alert-{{ flash-type }} alert-dismissible fade show" role="alert">
+      {{ flash }}
+      <button type="button" class="close" data-dismiss="alert" aria-label="Close">
           <span aria-hidden="true">&times;</span>
-        </button>
-      </div>
-    {% endfor %}
-  {% endif %}
-{% endwith %}
+      </button>
+  </div>
+{{/if}}

src/lib/pug/navigation.pug

@@ -1,6 +1,6 @@
 nav.navbar.navbar-expand-lg.navbar-dark.bg-dark
   .container
-    a.navbar-brand(href="{{ url_for('index') }}") tlater
+    a.navbar-brand(href="/") tlater
     button.navbar-toggler(
       type="button",
       data-toggle="collapse",
@@ -13,5 +13,5 @@ nav.navbar.navbar-expand-lg.navbar-dark.bg-dark
 
     #navbar.navbar-collapse.collapse
       ul.navbar-nav.mr-auto
-        li.nav-item: a.nav-link(href="{{ url_for('mail') }}") E-Mail
+        li.nav-item: a.nav-link(href="mail") E-Mail
         li.nav-item: a.nav-link(href="https://www.github.com/TLATER") GitHub