Fix: Ensure core WordPress fields remain visible when unchecked in settings

[Copilot]

Unchecking core fields like post_title or post_content in the settings UI caused them to disappear permanently, preventing users from re-enabling them.

Root cause: The available fields list only included fields marked as indexable in saved settings or discovered as post meta. Core WordPress fields that were unchecked became invisible.

Changes

Added get_core_fields() method to define fields that must always be available:

• post_title, post_content, post_excerpt
• post_date, post_modified (already protected)
• post_author, permalink

Updated field discovery in two locations:

1. WPLoupe_Settings_Page::get_available_fields() - Settings page field list now starts with core fields
2. WP_Loupe_REST::handle_post_type_fields_request() - REST endpoint returns core fields first

private function get_core_fields() {
    return [
        'post_title'    => true,
        'post_content'  => true,
        'post_excerpt'  => true,
        'post_date'     => true,
        'post_modified' => true,
        'post_author'   => true,
        'permalink'     => true,
    ];
}

Core fields now remain in the UI with checkboxes unchecked, allowing users to toggle them without losing access.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/Brain-WP/BrainMonkey/zipball/d95a9d895352c30f47604ad1b825ab8fa9d1a373
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/Toflar/state-set-index/zipball/c374bc1efd56a91a547c8dfdc3facbfa09e1b295
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/antecedent/patchwork/zipball/8b6b235f405af175259c8f56aea5fc23ab9f03ce
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/doctrine/dbal/zipball/1a2fbd0e93b8dec7c3d1ac2b6396a7b929b130dc
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/doctrine/deprecations/zipball/459c2f5dd3d6a4633d3b5f46ee2b1c40f57d3f38
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/doctrine/lexer/zipball/31ad66abc0fc9e1a1f2d9bc6a42668d2fbbcd6dd
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/hamcrest/hamcrest-php/zipball/f8b1c0173b22fa6ec77a81fe63e5b01eba7e6487
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/joomla-framework/string/zipball/da2329e05f1f5fc98b709f8638f279513bcd1108
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/loupe-php/loupe/zipball/1fc08816d475d2972ee13da0d55d90abac2081cb
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/loupe-php/matcher/zipball/298d7855200f4d7e45bea3165c3c64753689354c
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/mjaschen/phpgeo/zipball/7cd19b96d3626a16c9045bec784eb3f8ab72b976
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/mockery/mockery/zipball/1f4efdd7d3beafe9807b08156dfcb176d18f1699
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/nitotm/efficient-language-detector/zipball/f7f999d8bfd7e4aaf3fb1cf4ba8ca91ea9bbddab
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/php-fig/cache/zipball/aa5030cfa5405eccfdcb1083ce040c2cb8d253bf
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/php-fig/log/zipball/f16e1d5863e37f8d8c2a01719f5b34baa2b714d3
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/sebastianbergmann/global-state/zipball/987bafff24ecc4c9ac418cab1145b96dd6e9cbd9
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/202d0e344a580d7f7d04b3fafce6933e59dae906
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/24ed13d98130f0e7122df55d06c5c4942a577957
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/47e34210757a2f37a97dcd207d032e1b01e64c7a
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/sebastianbergmann/type/zipball/462699a16464c3944eefc02ebdd77882bd3925bf
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/sebastianbergmann/version/zipball/c51fa83a5d8f43f1402e3f32a005e6262244ef17
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/symfony/deprecation-contracts/zipball/63afe740e99a13ba87ec199bb07bbdee937a5b62
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/symfony/polyfill-mbstring/zipball/6d857f4d76bd4b343eac26d6b539585d2bc56493
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)
• https://api.github.com/repos/wamania/php-stemmer/zipball/d96509294ea843b4b86e4900df27424a6ea0ace8
  • Triggering command: /usr/bin/php8.3 -n -c /tmp/mcvZg0 /usr/bin/composer install --no-interaction (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Unchecking core fields from settings hides them permanently</issue_title>
<issue_description>I was testing the weighting and sorting features and decided to uncheck content and/or post title for some post types. After page refresh, those settings are no longer visible so I can't get them back.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Unchecking core fields from settings hides them permanently #75

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