Move declare(strict_types=1) after file-level docblock in all 12 class
files to satisfy WordPress Coding Standards docblock placement rule.
Fix multi-line function call formatting in class-psa-admin.php. Align
array double arrows and equals signs. Fix escaped backticks in
AIGeneratorTest heredoc that broke markdown fence stripping tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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