Support WordPress 7.0 compatibility

[anik-fahmid]

Summary

Ensure the plugin is fully compatible with WordPress 7.0 (latest major release).

Tasks

• Test plugin against WordPress 7.0 on a clean install
• Audit for deprecated WordPress core APIs/functions removed or changed in 7.0
• Verify block editor (Gutenberg) integrations still work
• Check admin UI, settings pages, and AJAX flows
• Run full test suite against WP 7.0
• Update Tested up to header in plugin readme/main file to 7.0
• Fix any PHP deprecation notices/warnings under WP 7.0

Notes

Part of org-wide WordPress 7.0 compatibility effort.