Master talents: experience, points and four branches (Builder, Warlord, Warlock, Merchant) with a toolbar window

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ai.rs

@@ -54,6 +54,7 @@ impl Game {
         self.ai_rooms(cx, cy);
         self.ai_towers(d, cx, cy);
         self.ai_fight(k, d, side, cx, cy);
+        self.ai_talents();
     }
 
     // the tiles an AI master may mark: within MARK_REACH tiles of its own ground