Prayer: bury on the spot, retuned costs

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

app.py

@@ -499,6 +499,9 @@ class Handler(BaseHTTPRequestHandler):
         if path == "/api/track":
             return game.toggle_track(player, str(body.get("id")))
         if path == "/api/settings":
+            if isinstance(body.get("bury"), bool):
+                player["bury"] = body["bury"]
+                return None
             if body.get("overflow") not in ("city", "stop"):
                 return "Bad setting"
             player["overflow"] = body["overflow"]