Tabs causes state_unsafe_mutation when value unset

[hmnd]

Repro: https://svelte.dev/playground/f4d4b324abe742f7b0fea4d087ddb22e?version=5.19.9

When the tabs are defined as $state instead of a const, the Tabs builder causes a state_unsafe_mutation error. This is happening because the value gets set within getTrigger/getContent if value is yet undefined.

[xiadnoring]

Hello.
Try to set default value

const tabs = new Tabs({"value": "Tab 1"})