fixed wrong generated URLs

site/layouts/_default/calendar.html

@@ -4,7 +4,16 @@
   <h1>{{ .Title }}</h1>
 </header>
 
-<div id="pa-calendar" data-events="{{ .Params.events | jsonify }}"></div>
+{{- /* Event urls are stored root-relative; strip the leading slash so relURL
+       prepends the baseURL subpath, keeping event clicks working when the site
+       is served from a subdirectory. */ -}}
+{{- $events := slice }}
+{{- range .Params.events }}
+  {{- $e := . }}
+  {{- with .url }}{{ $e = merge $e (dict "url" (strings.TrimPrefix "/" . | relURL)) }}{{ end }}
+  {{- $events = $events | append $e }}
+{{- end }}
+<div id="pa-calendar" data-events="{{ $events | jsonify }}"></div>
 
 {{- if .Content }}
 <div class="md-content">