Snapshot synced v3.6.1 working state as baseline

Machine-sync snapshot: the working tree carried the full 3.0.0-3.6.1 arc
(licensing/FileManager/DatabaseExplorer removal, all new replacement screens
and REST controllers) that had not been committed on this machine. Captured
here as a safety baseline before starting the Adminify-parity revamp.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

admin/src/Posts/ScheduledDayFilter.php

@@ -18,6 +18,7 @@ class ScheduledDayFilter
 
   private static function day()
   {
+    // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only query-string filter for the posts list (like core's own list table filters, e.g. ?post_status=), no state change; value is sanitized and further validated against a strict date pattern below.
     $day = isset($_GET["aurora_day"]) ? sanitize_text_field(wp_unslash($_GET["aurora_day"])) : "";
     return preg_match('/^\d{4}-\d{2}-\d{2}$/', $day) ? $day : "";
   }