Fix double elimination with byes never finishing; hand-built brackets

Byes now cascade through the whole bracket (a slot nobody can fill is a bye or
a void), re-run on server start so stuck tournaments recover. New manual
bracket builder on the desk: pick round-1 pairings per match. Tests at 5-23
teams for both bracket types. Release 0.5.0.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01MB7nCCAscYsb3zzkT6LHZi

server/public/admin.js

@@ -25,6 +25,17 @@
 
   document.querySelectorAll('[data-copy]').forEach(b => b.addEventListener('click', () => navigator.clipboard?.writeText(b.dataset.copy).then(() => { b.textContent = 'Copied'; })));
 
+  // manual bracket builder: highlight a team picked twice before the form is submitted
+  const pairsForm = document.querySelector('.manualform');
+  if (pairsForm) {
+    const check = () => {
+      const seen = new Map();
+      pairsForm.querySelectorAll('select[name^=a],select[name^=b]').forEach(sel => { if (sel.value) seen.set(sel.value, (seen.get(sel.value) ?? 0) + 1); });
+      pairsForm.querySelectorAll('tr').forEach(tr => tr.classList.toggle('dup', [...tr.querySelectorAll('select')].some(sel => sel.value && seen.get(sel.value) > 1)));
+    };
+    pairsForm.addEventListener('change', check); check();
+  }
+
   // keep the desk fresh when another organizer enters a score
   const ws = new WebSocket(`${location.protocol === 'https:' ? 'wss' : 'ws'}://${location.host}/ws/${slug}`);
   let last = null;

server/public/app.css

@@ -115,6 +115,9 @@ body.display .queue{font-size:26px}body.display details{display:none}
 .keeperbox .button{margin-top:6px}
 .qrgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}.qrgrid .qr img{width:min(80vw,300px)}
 @media print{.qrgrid{grid-template-columns:1fr 1fr}.qrgrid .card{break-inside:avoid;border:1px solid #000}}
+.manual{margin-top:10px}.manual summary{font-weight:600;color:var(--accent)}
+.pairs select{max-width:220px;font:inherit;padding:4px 6px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink)}
+.pairs td{padding:4px 6px}.pairs tr.dup select{border-color:var(--crit)}
 /* score keeper (Courtside Manager) */
 body.keeper-body{background:#0F1418;color:#F2F5F7}body.keeper-body .top,body.keeper-body .foot{display:none}
 body.keeper-body main{max-width:720px;padding:12px 12px 40px}