Description

With starlette==1.0.0rc1, importing solara.server.starlette crashes:

TypeError: Starlette.__init__() got an unexpected keyword argument 'on_startup'

Cause: solara/server/starlette.py constructs the app at import time using removed kwargs:

app = Starlette(routes=routes, on_startup=[on_startup], on_shutdown=[on_shutdown], middleware=middleware)

Starlette 1.0 removed on_startup / on_shutdown (replaced by lifespan).

To reproduce

pip install --pre solara starlette
python -c "import solara.server.starlette"
# (also triggers during pytest plugin discovery if solara is installed)

Expected

Solara imports / runs with Starlette 1.0 (or at least doesn’t hard-fail during pytest plugin autoload).

Suggested fix

Use Starlette’s lifespan= instead of on_startup / on_shutdown (or gate by Starlette version).

See Starlette Lifespan docs.