ui: watched-episode state (dimmed + check, next-up highlight), favicon

static/style.css

@@ -115,5 +115,7 @@ button.tiny.on { border-color: var(--acc); color: var(--acc); }
 .ep { position: relative; font-size: 0.9rem; }
 .ep.active { border-color: var(--acc); color: var(--acc); }
 .ep.filler { opacity: 0.55; }
+.ep.done { opacity: 0.5; }
+.ep.nextup { border-color: #4b5568; background: #1f2130; }
 .badge { font-size: 0.6rem; color: var(--muted); }