feat(navbar): selo ouvindo agora com dados do Last.fm

src/base/components/Navbar/Navbar.tsx

@@ -14,6 +14,7 @@ import {
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 
 import { LanguageSelector } from './LanguageSelector';
+import { NowPlayingBadge } from './NowPlayingBadge';
 import { PreferencesPanel } from './PreferencesPanel';
 import { SITE_NAME } from '@/lib/site';
 
@@ -125,22 +126,28 @@ export const Navbar = () => {
               })}
             </nav>
 
-            <div className="ml-1 flex items-center gap-1">
-              <PreferencesPanel />
-              <LanguageSelector />
+            <div className="ml-3 flex items-center gap-3">
+              <NowPlayingBadge variant="full" />
+              <div className="flex items-center gap-1">
+                <PreferencesPanel />
+                <LanguageSelector />
+              </div>
             </div>
           </div>
 
-          <button
-            type="button"
-            aria-label="Abrir menu"
-            aria-expanded={mobileMenuOpen}
-            aria-controls="mobile-navigation"
-            onClick={() => setMobileMenuOpen(true)}
-            className="-mr-3 ml-auto flex size-12 items-center justify-center text-site-foreground transition-colors hover:text-site-primary-hover md:hidden"
-          >
-            <MenuIcon />
-          </button>
+          <div className="-mr-3 ml-auto flex items-center gap-3 md:hidden">
+            <NowPlayingBadge variant="compact" />
+            <button
+              type="button"
+              aria-label="Abrir menu"
+              aria-expanded={mobileMenuOpen}
+              aria-controls="mobile-navigation"
+              onClick={() => setMobileMenuOpen(true)}
+              className="flex size-12 items-center justify-center text-site-foreground transition-colors hover:text-site-primary-hover"
+            >
+              <MenuIcon />
+            </button>
+          </div>
         </div>
       </header>
 

src/base/components/Navbar/NowPlayingBadge.tsx

@@ -0,0 +1,116 @@
+'use client';
+
+import Image from 'next/image';
+import Link from 'next/link';
+import { useState } from 'react';
+
+import useSWR from 'swr';
+
+import { LastfmTrack } from '@/types/Lastfm';
+
+type NowPlayingResponse = {
+  nowPlaying: LastfmTrack | null;
+};
+
+const jsonFetcher = (url: string) => fetch(url).then((r) => r.json());
+
+const NowPlayingArt = ({
+  track,
+  size,
+}: {
+  track: LastfmTrack;
+  size: number;
+}) => {
+  const [failed, setFailed] = useState(false);
+
+  if (!track.imageUrl || failed) {
+    return (
+      <div
+        aria-hidden="true"
+        className="shrink-0 rounded bg-site-card-hover"
+        style={{ width: size, height: size }}
+      />
+    );
+  }
+
+  return (
+    <Image
+      src={track.imageUrl}
+      alt=""
+      width={size}
+      height={size}
+      unoptimized
+      className="shrink-0 rounded object-cover"
+      style={{ width: size, height: size }}
+      onError={() => setFailed(true)}
+    />
+  );
+};
+
+const LiveDot = ({ className = '' }: { className?: string }) => (
+  <span
+    aria-hidden="true"
+    className={`rounded-full bg-spotify motion-safe:animate-pulse ${className}`}
+  />
+);
+
+type NowPlayingBadgeProps = {
+  /** 'full' = capa + faixa + artista (desktop). 'compact' = só a capa (mobile). */
+  variant: 'full' | 'compact';
+};
+
+/**
+ * Selo "ouvindo agora" da navbar. Só renderiza algo quando há uma faixa
+ * tocando no momento — sem música, o componente não ocupa espaço nenhum.
+ */
+export const NowPlayingBadge = ({ variant }: NowPlayingBadgeProps) => {
+  const { data } = useSWR<NowPlayingResponse>(
+    '/api/lastfm/now-playing',
+    jsonFetcher,
+    { revalidateOnFocus: false, refreshInterval: 60_000 },
+  );
+  const track = data?.nowPlaying;
+
+  if (!track) return null;
+
+  const href =
+    track.imageSource === 'spotify' && track.spotifyUrl
+      ? track.spotifyUrl
+      : track.url;
+
+  if (variant === 'compact') {
+    return (
+      <Link
+        href={href}
+        target="_blank"
+        rel="noopener noreferrer"
+        aria-label={`Ouvindo agora: ${track.name}, ${track.artist}`}
+        className="relative flex shrink-0 items-center rounded focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-site-primary"
+      >
+        <NowPlayingArt track={track} size={28} />
+        <LiveDot className="absolute -bottom-0.5 -right-0.5 size-2 ring-2 ring-site-background" />
+      </Link>
+    );
+  }
+
+  return (
+    <Link
+      href={href}
+      target="_blank"
+      rel="noopener noreferrer"
+      title={`Ouvindo agora: ${track.name} — ${track.artist}`}
+      className="flex items-center gap-2 rounded-full border border-site-border-subtle bg-site-card py-1 pl-1 pr-3 no-underline transition-colors hover:border-site-border focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-site-primary"
+    >
+      <NowPlayingArt track={track} size={26} />
+      <div className="min-w-0 leading-tight">
+        <p className="m-0 max-w-[9rem] truncate text-xs font-semibold text-site-foreground">
+          {track.name}
+        </p>
+        <p className="m-0 max-w-[9rem] truncate text-[11px] text-site-body-muted">
+          {track.artist}
+        </p>
+      </div>
+      <LiveDot className="size-1.5 shrink-0" />
+    </Link>
+  );
+};