fix(enterprise): respect root for login url when not mounted under /

See #157 (comment)

packages/solara-enterprise/solara_enterprise/auth/utils.py

@@ -32,4 +32,5 @@ def get_login_url(return_to_path: Optional[str] = None):
         return_to_path = return_to_path[1:]
     assert settings.main.base_url is not None
     redirect_uri = urllib.parse.quote(settings.main.base_url + return_to_path)
-    return f"/_solara/auth/login?redirect_uri={redirect_uri}"
+    root = settings.main.root_path or ""
+    return f"{root}/_solara/auth/login?redirect_uri={redirect_uri}"

solara/server/settings.py

@@ -123,7 +123,7 @@ class MainSettings(pydantic.BaseSettings):
     mode: str = "production"
     tracer: bool = False
     timing: bool = False
-    root_path: Optional[str] = None  # e.g. /myapp/
+    root_path: Optional[str] = None  # e.g. /myapp (without trailing slash)
     base_url: str = ""  # e.g. https://myapp.solara.run/myapp/
     platform: str = sys.platform