Svelte Inertia examples fail E2E builds under Vite/Rolldown

[cofin]

Summary

The aggregate make test target currently fails in the Svelte Inertia example matrix. The focused Inertia protocol/unit checks pass, but the Svelte examples do not become ready in dev mode and production builds fail while parsing @inertiajs/svelte package components.

Observed failures

make test reports errors for:

• src/py/tests/e2e/test_dev_mode.py::test_dev_mode_homepage[svelte-inertia]
• src/py/tests/e2e/test_dev_mode.py::test_dev_mode_homepage[svelte-inertia-jinja]
• src/py/tests/e2e/test_dev_mode.py::test_dev_mode_api_summary[svelte-inertia]
• src/py/tests/e2e/test_dev_mode.py::test_dev_mode_api_summary[svelte-inertia-jinja]
• src/py/tests/e2e/test_production_mode.py::test_production_homepage[svelte-inertia]
• src/py/tests/e2e/test_production_mode.py::test_production_homepage[svelte-inertia-jinja]
• src/py/tests/e2e/test_production_mode.py::test_production_api_summary[svelte-inertia]
• src/py/tests/e2e/test_production_mode.py::test_production_api_summary[svelte-inertia-jinja]

The production build error includes Rolldown parse failures in:

• node_modules/@inertiajs/svelte/dist/components/InfiniteScroll.svelte:94:32
• node_modules/@inertiajs/svelte/dist/components/Form.svelte:109:32

Both fail with Expected "," or ")" but found "?".

Notes

This appears to be isolated to the Svelte Inertia example build path and is separate from the Python Inertia protocol fixes.