Fixed nation id being captured too late.

webui.py

@@ -146,7 +146,9 @@ def create_ai_table(era, table_container, ai_slots):
                 ui.select(
                     AI_LEVELS,
                     value="Human",
-                    on_change=lambda e: set_ai_level(e.value, nation_id, ai_slots),
+                    on_change=lambda e, nid=nation_id: set_ai_level(
+                        e.value, nid, ai_slots
+                    ),
                 )