fix(cloud): launch newly registered accounts through Space (#2499)

* fix(cloud): launch new accounts through Space

* style: format Cloud entry URL

* fix(cloud): wait for launch workspace projection

---------

Co-authored-by: dadachann <185672915+dadachann@users.noreply.github.com>

src/langbot/pkg/api/http/service/space.py

@@ -124,6 +124,11 @@ class SpaceService:
             params['state'] = state
         return f'{authorize_url}?{urlencode(params)}'
 
+    def get_cloud_entry_url(self) -> str:
+        """Return the Space-owned Cloud selector for a Cloud Account login."""
+
+        return f'{self._get_space_config()["url"].rstrip("/")}/cloud?environment=beta'
+
     async def exchange_oauth_code(
         self,
         code: str,