added npc images to API and frontend

public_web/app/views/game_views.py

@@ -704,7 +704,8 @@ def npc_chat_modal(session_id: str, npc_id: str):
             'name': npc_data.get('name'),
             'role': npc_data.get('role'),
             'appearance': npc_data.get('appearance', {}).get('brief', ''),
-            'tags': npc_data.get('tags', [])
+            'tags': npc_data.get('tags', []),
+            'image_url': npc_data.get('image_url')
         }
 
         # Get relationship info