feat: artist hero redesign — album art banner + circular pfp on left

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/views/detail.js

@@ -71,7 +71,11 @@ export async function loadArtistDetail(artist) {
   const albEl  = document.getElementById('artist-albums-section');
   hero.style.background = 'linear-gradient(135deg, var(--surface2), var(--surface))';
   hero.querySelector('.artist-hero-img')?.remove();
-  hero.querySelector('.artist-hero-bg')?.remove();
+  const heroBgEl = document.getElementById('artist-hero-bg');
+  if(heroBgEl) heroBgEl.style.backgroundImage = '';
+  document.getElementById('artist-hero-pfp-wrap')?.querySelector('.artist-hero-pfp')?.remove();
+  const pfpInitial = document.getElementById('artist-hero-pfp-initial');
+  if(pfpInitial) pfpInitial.textContent = artist.name?.[0]?.toUpperCase() || '?';
   const overlay = hero.querySelector('.artist-hero-overlay');
   if(overlay) overlay.style.background = '';
   [bioEl, simEl, tsEl, albEl].forEach(el => { if(el) el.innerHTML = ''; });
@@ -109,18 +113,23 @@ export async function loadArtistDetail(artist) {
 
   // ── Hero ──
   const img = imgRes.status === 'fulfilled' ? imgRes.value : null;
-  if(img) {
+  const _firstAlbums = albumRes.status === 'fulfilled' ? (albumRes.value?.artist?.album || []) : [];
+  const _bgCover = _firstAlbums[0] ? coverUrl(_firstAlbums[0].coverArt, 512) : null;
+  if(_bgCover || img) {
     hero.style.background = '';
-    const bgEl = document.createElement('div');
-    bgEl.className = 'artist-hero-bg';
-    bgEl.style.backgroundImage = `url('${img}')`;
-    hero.insertBefore(bgEl, overlay);
-    const heroImg = document.createElement('img');
-    heroImg.className = 'artist-hero-img';
-    heroImg.alt = '';
-    heroImg.src = img;
-    hero.insertBefore(heroImg, overlay);
-    if(overlay) overlay.style.background = 'linear-gradient(to right,rgba(7,7,15,.95) 0%,rgba(7,7,15,.35) 55%,rgba(7,7,15,.75) 100%)';
+    const bgEl = document.getElementById('artist-hero-bg');
+    if(bgEl) bgEl.style.backgroundImage = `url('${_bgCover || img}')`;
+    if(overlay) overlay.style.background = 'linear-gradient(to top,rgba(7,7,15,.92) 0%,rgba(7,7,15,.35) 100%)';
+  }
+  if(img) {
+    const pfpWrap = document.getElementById('artist-hero-pfp-wrap');
+    if(pfpWrap) {
+      const pfpImg = document.createElement('img');
+      pfpImg.className = 'artist-hero-pfp';
+      pfpImg.alt = '';
+      pfpImg.src = img;
+      pfpWrap.prepend(pfpImg);
+    }
   }
 
   // ── Bio ──