Add theme-color and simplify embed description

backend/src/embeds.ts

@@ -34,7 +34,7 @@ function ogTitle(video: VideoEntry): string {
 function ogDescription(video: VideoEntry): string {
     const parts: string[] = [formatRunTime(video.runTime)];
     if (video.tier != null) parts.push(`Tier ${video.tier}`);
-    return `${video.playerName} on ${mapDisplayName(video.mapName)} · ${parts.join(" · ")}`;
+    return parts.join(" · ");
 }
 
 function buildOgsHtml(video: VideoEntry): string {
@@ -54,7 +54,8 @@ function buildOgsHtml(video: VideoEntry): string {
         `    <meta property="og:description" content="${escapeHtml(description)}" />\n` +
         `    <meta property="og:url" content="${runUrl}" />\n` +
         `    <meta property="og:type" content="video.other" />\n` +
-        `    <meta property="og:site_name" content="surf.nathan.rip" />`;
+        `    <meta property="og:site_name" content="surf.nathan.rip" />\n` +
+        `    <meta name="theme-color" content="#1896D3" />`;
 
     if (thumbnailUrl) {
         tags +=