fixed wrong generated URLs

site/layouts/partials/header.html

@@ -86,29 +86,25 @@
         </div>
         {{- $section := .Section }}
         {{- if $section }}
-        {{- $pfx := printf "/%s" $section }}
+        {{- /* Paths are passed to relURL *without* a leading slash: relURL only
+               prepends the baseURL subpath (e.g. /owner/repo/) for inputs that
+               are not already root-relative. .RelPermalink carries that same
+               prefix, so the active check compares like with like. */ -}}
         <ul id="menu" class="menu">
+            {{- range slice "venues" "calendar" "digests" }}
+            {{- $url := printf "%s/%s/" $section . | relURL }}
             <li>
-                <a href="{{ $pfx }}/venues/" title="Venues">
-                    <span{{- if hasPrefix .RelPermalink (printf "%s/venues/" $pfx) }} class="active"{{- end }}>Venues</span>
-                </a>
-            </li>
-            <li>
-                <a href="{{ $pfx }}/calendar/" title="Calendar">
-                    <span{{- if hasPrefix .RelPermalink (printf "%s/calendar/" $pfx) }} class="active"{{- end }}>Calendar</span>
-                </a>
-            </li>
-            <li>
-                <a href="{{ $pfx }}/digests/" title="Digests">
-                    <span{{- if hasPrefix .RelPermalink (printf "%s/digests/" $pfx) }} class="active"{{- end }}>Digests</span>
+                <a href="{{ $url }}" title="{{ . | title }}">
+                    <span{{- if hasPrefix $.RelPermalink $url }} class="active"{{- end }}>{{ . | title }}</span>
                 </a>
             </li>
+            {{- end }}
         </ul>
         {{- else }}
         <ul id="menu" class="menu">
             {{- range hugo.Data.topics.topics }}
             <li>
-                <a href="/{{ .slug }}/" title="{{ .title }}">
+                <a href="{{ printf "%s/" .slug | relURL }}" title="{{ .title }}">
                     <span>{{ .title }}</span>
                 </a>
             </li>