Polish: npm test runs every test file, two silent failures now log, Loading placeholders shimmer

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

public/settings-family.js

@@ -39,7 +39,7 @@ async function famKids(box) {
   box.querySelectorAll('[data-k]').forEach(b => b.onclick = () => famChild(kids.find(u => u.id === b.dataset.k)));
 }
 async function famChild(u) {
-  const el = openSheet(u.name, 'Last 7 days', '<div id="fcb"><p class="empty">Loading…</p></div>'); let a, px;
+  const el = openSheet(u.name, 'Last 7 days', '<div id="fcb"><p class="empty loading" role="status">Loading…</p></div>'); let a, px;
   try { [a, px] = await Promise.all([jfetch('/api/kid/activity?user=' + encodeURIComponent(u.id) + '&days=7'), jfetch('/api/kid/plex-lock?user=' + encodeURIComponent(u.id))]); } catch (e) { el.querySelector('#fcb').innerHTML = `<p class="err">${esc(e.message)}</p>`; return; }
   const h = m => m >= 60 ? Math.floor(m / 60) + ' h ' + (m % 60) + ' min' : m + ' min', total = a.days.reduce((n, d) => n + d.minutes, 0), by = {}; a.days.forEach(d => Object.entries(d.areas).forEach(([k, m]) => { by[k] = (by[k] || 0) + m; }));
   const icn = { play: '🎵', watch: '🎬', listen: '🎧', read: '📖', search: '🔎', signin: '🔑', chore: '✅', add: '➕', blocked: '⛔' }, max = Math.max(1, ...a.days.map(d => d.minutes));