Music: Mixes, Favorites and Stats; smart and Family playlists; library radio; offline albums; more

- Mixes tab: daily mix, most played, forgotten favorites, moods, on this day, decades, genres, smart playlists (rules), library radio
- Favorites (hearts, kept by the hub) and Stats (plays, time, top artists/songs/albums, streak, recently played)
- Family playlists shared by everyone with Music; queue reorder; More like this; album/artist About notes
- Save albums offline; player takes colors from the cover; Share a lyric line as a picture; verse of the day on Featured
- musicdata.js keeps plays, favorites, smart rules and Family playlists, with tests

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/lyrics-view.js

@@ -99,16 +99,16 @@ function lyrShell() {
       <button class="ibtn" id="lyrsm" aria-label="Smaller text" title="Smaller text">A−</button><button class="ibtn" id="lyrbg" aria-label="Larger text" title="Larger text">A+</button>
       <button class="ibtn" id="lyrx" aria-label="Close lyrics" title="Close (Esc)">${icon('x')}</button></div>
     <div class="lyrbody" id="lyrbody"><p class="empty">Looking for the lyrics…</p></div>
-    <div class="lyrfoot"><button class="btn ghost" id="lyrs">Wrong lyrics?</button><span class="grow"></span>
+    <div class="lyrfoot"><button class="btn ghost" id="lyrs">Wrong lyrics?</button><button class="btn ghost" id="lyrsh">Share a line</button><span class="grow"></span>
       <span class="lyrnudge" id="lyrnudge" hidden><button class="ibtn" id="lyrm" aria-label="Lyrics earlier" title="Lyrics too late? Show them earlier">−</button><small id="lyroff">0.0 s</small><button class="ibtn" id="lyrp" aria-label="Lyrics later" title="Lyrics too early? Show them later">+</button></span>
       <button class="ibtn" id="lyrpv" aria-label="Previous">${icon('prev')}</button><button class="ibtn big" id="lyrt" aria-label="Play or pause"></button><button class="ibtn" id="lyrnx" aria-label="Next">${icon('next')}</button></div>`;
   const $l = q => lyr.el.querySelector(q);
-  if (lyrSpokenKey(t)) { $l('#lyrk').hidden = true; $l('#lyrs').hidden = true; lyr.el.setAttribute('aria-label', 'Transcript'); } // (karaoke and "wrong lyrics" make no sense for speech)
+  if (lyrSpokenKey(t)) { $l('#lyrk').hidden = true; $l('#lyrs').hidden = true; $l('#lyrsh').hidden = true; lyr.el.setAttribute('aria-label', 'Transcript'); } // (karaoke and "wrong lyrics" make no sense for speech)
   $l('#lyrx').onclick = lyrClose; $l('#lyrpv').onclick = prev; $l('#lyrnx').onclick = next; $l('#lyrt').onclick = toggle;
   $l('#lyrk').onclick = () => { lyrSetPref({ karaoke: !lyrPref().karaoke }); lyr.el.className = lyrPref().karaoke ? 'kar' : ''; $l('#lyrk').setAttribute('aria-pressed', lyrPref().karaoke); lyr.idx = -2; };
   const size = d => { const v = Math.max(18, Math.min(64, lyrPref().size + d)); lyrSetPref({ size: v }); lyr.el.style.setProperty('--lf', v + 'px'); };
   $l('#lyrsm').onclick = () => size(-4); $l('#lyrbg').onclick = () => size(4);
-  $l('#lyrs').onclick = lyrSearchAgain;
+  $l('#lyrs').onclick = lyrSearchAgain; $l('#lyrsh').onclick = lyrShare;
   const nudge = d => { const k = cur().key, v = lyrOffset(k) + d; lyrSetOffset(k, v); $l('#lyroff').textContent = (v / 1000).toFixed(1) + ' s'; };
   $l('#lyrm').onclick = () => nudge(-lyrStep(cur())); $l('#lyrp').onclick = () => nudge(lyrStep(cur()));
   syncUI();
@@ -172,3 +172,33 @@ pl.a.addEventListener('playing', async () => {
     if (r.state === 'none' && r.canTranscribe) await jfetch('/api/transcript?' + q, { method: 'POST' });
   } catch { lyrAsked.delete(t.key); }
 });
+
+// ---- Share a line: the lyric over the album cover, as a picture (shared through the phone's share sheet, or downloaded)
+function lyrShare() {
+  const t = cur(), d = lyr.data; if (!t || !d || !d.found || d.instrumental || !d.lines) return toast('There are no lyrics to share yet');
+  const text = l => l.words ? l.words.map(w => w.text).join(' ') : l.text, rows = d.lines.map((l, i) => ({ i, s: (text(l) || '').trim() })).filter(x => x.s).slice(0, 250);
+  const now = d.sync !== 'none' && lyr.idx >= 0 ? lyr.idx : -1, el = openSheet('Share a line', 'Tick up to four lines for the picture.', `<div class="list" style="max-height:48dvh;overflow:auto">${rows.map(x => `<label class="row" style="cursor:pointer"><input type="checkbox" data-l="${x.i}"${x.i === now ? ' checked' : ''}><span class="grow" style="white-space:normal">${esc(x.s)}</span></label>`).join('')}</div>
+    <div class="bar"><button class="btn ghost" id="shx" style="flex:1;justify-content:center">Cancel</button><button class="btn" id="shgo" style="flex:1;justify-content:center">Make the picture</button></div>`);
+  el.querySelector('#shx').onclick = closeSheet;
+  el.querySelectorAll('input[data-l]').forEach(c => c.onchange = () => { if (el.querySelectorAll('input[data-l]:checked').length > 4) c.checked = false; });
+  el.querySelector('#shgo').onclick = async () => {
+    const picked = [...el.querySelectorAll('input[data-l]:checked')].map(c => rows.find(x => x.i === +c.dataset.l).s); if (!picked.length) return toast('Tick at least one line');
+    closeSheet();
+    try { const blob = await lyrCard(t, picked), file = new File([blob], (t.title || 'lyric').replace(/[^\w -]+/g, '') + '.png', { type: 'image/png' });
+      if (navigator.canShare && navigator.canShare({ files: [file] })) await navigator.share({ files: [file], title: t.title, text: t.title + ' — ' + t.artist }).catch(e => { if (e.name !== 'AbortError') throw e; });
+      else { const a = document.createElement('a'); a.href = URL.createObjectURL(blob); a.download = file.name; a.click(); setTimeout(() => URL.revokeObjectURL(a.href), 4000); toast('Saved the picture'); } } catch (e) { toast(e.message || 'Could not make the picture'); }
+  };
+}
+async function lyrCard(t, lines) {
+  const W = 1080, H = 1350, cv = document.createElement('canvas'); cv.width = W; cv.height = H; const x = cv.getContext('2d');
+  const img = await new Promise(ok => { const im = new Image(); im.onload = () => ok(im); im.onerror = () => ok(null); im.src = px.art(t.thumb, 800); });
+  x.fillStyle = '#14161b'; x.fillRect(0, 0, W, H);
+  if (img) { x.save(); x.filter = 'blur(40px) saturate(1.3)'; const k = Math.max(W / img.width, H / img.height) * 1.2; x.drawImage(img, (W - img.width * k) / 2, (H - img.height * k) / 2, img.width * k, img.height * k); x.restore(); }
+  const g = x.createLinearGradient(0, 0, 0, H); g.addColorStop(0, 'rgba(0,0,0,.35)'); g.addColorStop(1, 'rgba(0,0,0,.75)'); x.fillStyle = g; x.fillRect(0, 0, W, H);
+  const text = lines.join('\n'), size = text.length > 160 ? 52 : text.length > 90 ? 62 : 74; x.fillStyle = '#fff'; x.font = `700 ${size}px system-ui, -apple-system, Segoe UI, sans-serif`; x.textAlign = 'center'; x.textBaseline = 'middle';
+  const wrapped = []; for (const ln of lines) { let cur1 = ''; for (const w of ln.split(/\s+/)) { const tryl = cur1 ? cur1 + ' ' + w : w; if (x.measureText(tryl).width > W - 160 && cur1) { wrapped.push(cur1); cur1 = w; } else cur1 = tryl; } wrapped.push(cur1); }
+  const lh = size * 1.3, y0 = H / 2 - ((wrapped.length - 1) * lh) / 2 - 40; wrapped.forEach((ln, i) => x.fillText(ln, W / 2, y0 + i * lh));
+  if (img) { const s = 150, ax = 100, ay = H - 250; x.save(); x.beginPath(); x.roundRect ? x.roundRect(ax, ay, s, s, 18) : x.rect(ax, ay, s, s); x.clip(); x.drawImage(img, ax, ay, s, s); x.restore(); }
+  x.textAlign = 'left'; x.font = '700 40px system-ui, sans-serif'; x.fillText(t.title.slice(0, 34), 280, H - 200); x.font = '400 34px system-ui, sans-serif'; x.fillStyle = 'rgba(255,255,255,.75)'; x.fillText((t.artist || '').slice(0, 40), 280, H - 150);
+  return new Promise((ok, no) => cv.toBlob(b => b ? ok(b) : no(new Error('Could not make the picture')), 'image/png'));
+}