add: backlink, technical aspects, nav

Add "Wissen" to navigation, fix some smaller issues, add backlink to posts

app/components/Pp/Navigation.vue

@@ -7,7 +7,7 @@
       <ul class="flex-col">
         <li v-for="page in pages">
           <NuxtLink :to="page.route" @click="close()" active-class="active">
-            <Icon class="icon" :name="`uil:${page.icon}`" mode="svg" />
+            <Icon class="icon" :name="page.icon" mode="svg" />
             <span>{{ page.label }}</span>
           </NuxtLink>
         </li>
@@ -24,14 +24,19 @@ const open = computed(() => nav.isNavigationVisible.value)
 const pages = [
   {
     label: 'Home',
-    icon: 'home',
+    icon: 'uil:home',
     route: '/'
   },
   {
     label: 'Schnellrechner',
-    icon: 'calculator',
+    icon: 'uil:calculator',
     route: '/rechner'
   },
+  {
+    label: 'Wissen',
+    icon: 'uil:brain',
+    route: '/wissen'
+  },
   // {
   //   label: 'Über uns',
   //   icon: 'users-alt',