update icon and template handling

assets/diary/diary-month.html

@@ -0,0 +1,15 @@
+{{range .Days}}
+<div class="diary-section">
+  <h2 class="diary-heading">
+    {{if .URL}}<a href="{{.URL}}">{{.Heading}}</a>{{else}}{{.Heading}}{{end}}
+  </h2>
+  {{if .Content}}<div class="content">{{.Content}}</div>{{end}}
+  {{if .Photos}}
+  <div class="diary-photo-grid">
+    {{range .Photos}}
+    <a href="{{.URL}}" target="_blank"><img src="{{.URL}}" alt="{{.Name}}" loading="lazy"></a>
+    {{end}}
+  </div>
+  {{end}}
+</div>
+{{end}}