[WIP] Add key parameter to defaultComponentContext function

[Claude]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add key parameter to defaultComponentContext function</issue_title>
<issue_description>Similarly to retainedComponentContext.</issue_description>

Comments on the Issue (you are @claude[agent] in this section)

• Fixes Add key parameter to defaultComponentContext function #989