Frontend: pridavanie botov v lobby

Hostitel prida na volne sedadlo bota (+ Bot = heuristika, + AI bot =
natrenovana siet) alebo bota odoberie; boti maju vlastnu ikonu a flag
is_bot v rosteroch. Surove ucty bot:<kind>-<n> sa vsade zobrazuju cez
displayName ako "Bot 2" / "AI bot 1" (stol, kopka, tabulky, historia).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/pages/History.tsx

@@ -3,6 +3,7 @@ import { useNavigate } from 'react-router-dom';
 import { useGameStore } from '../store/gameStore';
 import { emit, socket } from '../lib/socket';
 import { useIsDesktop } from '../lib/useIsDesktop';
+import { displayName } from '../lib/names';
 import type { GameDetail, GameDetailRound } from '../types';
 
 function fmtDate(iso: string | null): string {
@@ -62,7 +63,7 @@ export default function History() {
               className="flex-1 min-w-0 text-left px-4 py-3 hover:bg-white/[.02] transition-colors"
             >
               <p className="font-serif text-green-score truncate">{g.name || 'Hra'}</p>
-              <p className="text-xs text-green-dim mt-1 truncate">{g.players.join(', ')}</p>
+              <p className="text-xs text-green-dim mt-1 truncate">{g.players.map((n) => displayName(n)).join(', ')}</p>
               <p className="text-xs text-[#7a7058] mt-0.5">
                 {fmtDate(g.created_at)} · {g.completed ? 'dohraná' : 'predčasne ukončená'}
               </p>
@@ -158,7 +159,7 @@ function GameDetailView({ detail, onBack }: { detail: GameDetail; onBack: () =>
           }}
         >
           <span className="uppercase text-gold" style={{ letterSpacing: '.06em', fontSize: 11 }}>
-            {p.username}
+            {displayName(p.username)}
           </span>
           <span className="font-serif text-gold-dim" style={{ fontWeight: 700, fontSize: 16 }}>
             {totals[c]}