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/mail.js

@@ -165,7 +165,7 @@ async function viewMail(args = []) {
       st = saved; mail.st = saved;
       jfetch('/api/mail/status?light=1').then(fresh => { if (!fresh.connected || fresh.accounts.map(a => a.id).join() !== saved.accounts.map(a => a.id).join()) { mail.st = null; mcClear(); if (location.hash.startsWith('#/mail')) route(); } else { mail.st = { ...fresh, accounts: fresh.accounts.map(a => ({ ...a, unread: (mail.st.accounts.find(x => x.id === a.id) || {}).unread ?? a.unread })) }; mcPut('st', mail.st); } }).catch(() => {});
     } else {
-      v.innerHTML = '<div class="wrap"><h1>Mail</h1><p class="empty">Loading…</p></div>';
+      v.innerHTML = '<div class="wrap"><h1>Mail</h1><p class="empty loading" role="status">Loading…</p></div>';
       try { st = await jfetch('/api/mail/status?light=1'); } catch (e) { v.innerHTML = `<div class="wrap"><h1>Mail</h1><p class="err">${esc(e.message)}</p></div>`; return; }
       if (st.connected) mcPut('st', { connected: true, accounts: st.accounts, outlook: st.outlook, providers: st.providers });
     }
@@ -241,7 +241,7 @@ async function mailLoadList(reset) {
     mail.items = []; mail.next = 0; mail.more = false;
     const saved = first && mcGet('l:' + folder);
     if (saved) { mail.items = saved.items; mail.more = saved.more; mail.next = saved.next; mailDrawList(); } // last time's list, right away
-    else { const rows = $('#mrows'); if (rows) rows.innerHTML = '<p class="empty">Loading…</p>'; }
+    else { const rows = $('#mrows'); if (rows) rows.innerHTML = '<p class="empty loading" role="status">Loading…</p>'; }
   }
   const showing = reset && mail.items.length; // a saved list is on screen: the fresh one replaces it instead of being added to it
   try {