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/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}