feat: link series/movie titles to Sonarr/Radarr for admin users

- Series title links to Sonarr series page (/series/{titleSlug})
- Movie title links to Radarr movie page (/movie/{titleSlug})
- Links open in new tab, only shown for admin users
- Instance URL preserved through data aggregation for multi-instance support

public/style.css

@@ -602,6 +602,18 @@ body {
   accent-color: var(--accent);
 }
 
+/* ===== Arr Links (Admin) ===== */
+.arr-link {
+  color: var(--accent);
+  text-decoration: none;
+  border-bottom: 1px dotted var(--accent);
+}
+
+.arr-link:hover {
+  opacity: 0.8;
+  border-bottom-style: solid;
+}
+
 /* ===== Download Paths (Admin) ===== */
 .download-paths {
   flex-basis: 100%;