v1.0.3 — WordPress Playground blueprint fixes

Release notes for the existing v1.0.3 tag (shipped December 2024; published retroactively so the release history is complete).

Fixed

• WordPress Playground blueprint works correctly: runPHPWithOptions with environment variables, content filters disabled so XFN rel attributes survive, demo page published with /xfn-demo/ landing and auto-login
• Button blocks include the rel attribute in rendered HTML, not just metadata

Improved

• Demo content: visual indicators, testing instructions, expected-results table, richer inline examples

See CHANGELOG.md for v1.0.2 (also previously unpublished) and the full history.

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