docs: clarify Polygon auth and API contracts

site/routes/root.py

@@ -78,6 +78,7 @@ def index():
         svc_list=svc_list,
         stands_list=stands_list,
         current_stand=current_stand,
+        swagger_url=(f"/{current_stand}/swagger" if len(stands_list) > 1 else "/swagger"),
         endpoint=_POLYGON_ENDPOINT,
     )
 
@@ -92,8 +93,10 @@ def swagger():
     from routes.openapi import _build_spec
     import json as _json
     spec_json = _json.dumps(_build_spec(), ensure_ascii=False)
+    home_url = f"/{g.stand_id}/" if len(_cfg.list_stands()) > 1 else "/"
     return render_template(
         "swagger.html",
         version=_cfg.VERSION,
         spec_json=spec_json,
+        home_url=home_url,
     )