add artists/tracks pages; more components; css cleanup

admin/templates/html/components/artist/artist.html

@@ -0,0 +1,6 @@
+{{define "artist"}}
+<div class="artist">
+    <img src="{{.GetAvatar}}" alt="" width="64" loading="lazy" class="artist-avatar">
+    <a href="/admin/artists/{{.ID}}" class="artist-name">{{.Name}}</a>
+</div>       
+{{end}}

admin/templates/html/components/track/track.html

@@ -0,0 +1,24 @@
+{{define "track"}}
+<div class="track" data-id="{{.ID}}">
+    <h2 class="track-title">
+        {{if .Number}}
+        <span class="track-number">{{.Number}}</span>
+        {{end}}
+        <a href="/admin/tracks/{{.ID}}">{{.Title}}</a>
+    </h2>
+
+    <h3>Description</h3>
+    {{if .Description}}
+    <p class="track-description">{{.GetDescriptionHTML}}</p>
+    {{else}}
+    <p class="track-description empty">No description provided.</p>
+    {{end}}
+
+    <h3>Lyrics</h3>
+    {{if .Lyrics}}
+    <p class="track-lyrics">{{.GetLyricsHTML}}</p>
+    {{else}}
+    <p class="track-lyrics empty">There are no lyrics.</p>
+    {{end}}
+</div>       
+{{end}}