Script Loader: Avoid false entries in inline script extras

[Sukhendu2002]

Trac ticket: https://core.trac.wordpress.org/ticket/52320

What this PR does

This PR fixes an unintended false entry being stored in WP_Scripts inline script data when adding the first inline script for a handle.

When WP_Scripts::get_data() returns false for missing before/after data, WP_Scripts::add_inline_script() previously cast that directly to an array, producing array( false ) before appending the real inline script.

This change treats missing inline script data as an empty array before appending.

Before:

   array( false, 'console.log( "test" );' )

After:

   array( 'console.log( "test" );' )

Use of AI Tools

AI assistance: Yes
Tool(s): pi
Model(s): GPT-5.6
Used for: Patch review, test suggestions, and PR description drafting. final implementation and tests were reviewed and edited by me.

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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[github-actions]

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[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Core Committers: Use this line as a base for the props when committing in SVN:

Props sukhendu2002, jonsurrell, apermo.

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[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 63579
GitHub commit: 8fd5864

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.

[sirreal]

Thanks @Sukhendu2002!