feat: bots (#9)

Co-authored-by: Lala, Shahd <Shahd.Lala@sybit.de>
Reviewed-on: #9
Co-authored-by: Leon Hermann <lq@blackhole.local>
Co-committed-by: Leon Hermann <lq@blackhole.local>

src/app/pages/tournaments/tournaments.component.html

@@ -192,12 +192,12 @@
       <span class="dialog-brand">Join with a bot</span>
       <button type="button" class="dialog-close" (click)="closeJoinDialog()">×</button>
     </div>
-    <p class="join-hint">Select one of your bots to enter this tournament. Its token will be rotated to authenticate the join.</p>
+    <p class="join-hint">Select an official (engine-backed) bot to enter this tournament. These are the bots that actually play their moves.</p>
 
     @if (botsLoading) {
       <div class="dialog-loading"><span class="pulse"></span>Loading bots…</div>
     } @else if (userBots.length === 0) {
-      <p class="join-empty">You have no bots yet. Go to <strong>Bots</strong> in the nav to create one first.</p>
+      <p class="join-empty">No official bots are available. The official-bots engine service must be running to register them.</p>
     } @else {
       <div class="bot-pick-list">
         @for (bot of userBots; track bot.id) {