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/lib/socket.ts

@@ -50,6 +50,10 @@ export const emit = {
   // Reopen a prematurely-ended game from history back into the lobby.
   restoreGame: (gid: string) => socket.emit('restore_game', gid),
   leaveGame: () => socket.emit('leave_game'),
+  // Bots: host-only, before the game starts (seat picked by the server).
+  // kind: 'heuristic' (default) | 'neural' (trained net) | 'random'
+  addBot: (gid: string, kind: string = 'heuristic') => socket.emit('add_bot', gid, kind),
+  removeBot: (gid: string, order: number) => socket.emit('remove_bot', gid, order),
   endGame: (gid: string) => socket.emit('end_game', gid),
   startGame: (gid: string) => socket.emit('start_game', gid),
   reconnectToGame: (gid: string, token: string) => socket.emit('reconnect_to_game', gid, token),