Add a real replacement Posts management page (v2.5.0)

Posts was previously just dark-themed skinning over the native
edit.php list table, unlike Comments/Plugins which are genuine
replacements. Built the same way: new PostsData.php REST controller
(list with status/search filters matching native tabs, trash, restore,
permanent delete) and a Vue page matching the Comments layout.

- SubApps.php registers it as aurora-admin-posts, parented under
  edit.php (same pattern as Plugins under plugins.php).
- redirect_native_pages() redirects direct edit.php visits (typed URL,
  not just the sidebar link) to the Aurora page — gated to the default
  post type only, so Pages and other custom post types are untouched.
- MenuSerializer rewrites the sidebar's Posts/All Posts links the same
  way Plugins/Comments already were.
- Gated by Settings > Posts' "Modern posts table" toggle, re-added now
  that it has a real implementation (it was removed a few commits ago
  for describing a feature that didn't exist).
- Fixed modern_plugins/modern_comments/modern_posts all defaulting to
  visually "on" in the Settings UI to match their actual PHP default.

Verified live: trash/restore/status filters/search all work correctly,
edit.php redirects to the Aurora page, edit.php?post_type=page (Pages)
correctly does not.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

admin/src/Pages/SubApps.php

@@ -46,6 +46,7 @@ class SubApps
     "aurora-admin-database" => ["title" => "Database Explorer", "entry" => "database-explorer", "feature" => "database-explorer"],
     "aurora-admin-plugins" => ["title" => "Installed Plugins", "entry" => "plugins", "feature" => null],
     "aurora-admin-comments" => ["title" => "Comments", "entry" => "comments", "feature" => null],
+    "aurora-admin-posts" => ["title" => "Posts", "entry" => "posts", "feature" => null],
   ];
 
   private static $hook_suffixes = [];
@@ -78,6 +79,9 @@ class SubApps
     if ($slug === "aurora-admin-plugins") {
       return "plugins.php";
     }
+    if ($slug === "aurora-admin-posts") {
+      return "edit.php";
+    }
     return "aurora-admin";
   }
 
@@ -86,7 +90,7 @@ class SubApps
     if ($slug === "aurora-admin-plugins") {
       return "activate_plugins";
     }
-    if ($slug === "aurora-admin-comments") {
+    if ($slug === "aurora-admin-comments" || $slug === "aurora-admin-posts") {
       return "edit_posts";
     }
     return "manage_options";
@@ -112,23 +116,36 @@ class SubApps
   {
     global $pagenow;
 
-    // Settings > Comments > "Modern comments page" — previously always
-    // redirected regardless of this setting; default true so existing
-    // installs keep their current behavior until explicitly turned off.
-    if (!Settings::get("modern_comments", true)) {
-      return;
-    }
-
-    if ($pagenow !== "edit-comments.php" || !current_user_can("edit_posts")) {
-      return;
-    }
-
     if (isset($_GET["page"]) || wp_doing_ajax()) {
       return;
     }
 
-    wp_safe_redirect(admin_url("admin.php?page=aurora-admin-comments"));
-    exit;
+    // Settings > Comments > "Modern comments page" — previously always
+    // redirected regardless of this setting; default true so existing
+    // installs keep their current behavior until explicitly turned off.
+    if (
+      $pagenow === "edit-comments.php" &&
+      current_user_can("edit_posts") &&
+      Settings::get("modern_comments", true)
+    ) {
+      wp_safe_redirect(admin_url("admin.php?page=aurora-admin-comments"));
+      exit;
+    }
+
+    // Settings > Posts > "Modern posts table". Only the default post-list
+    // view (edit.php with no post_type, or post_type=post) redirects —
+    // edit.php?post_type=page (Pages) and other custom post types are
+    // untouched, since only Posts has a replacement page.
+    $post_type = isset($_GET["post_type"]) ? sanitize_key(wp_unslash($_GET["post_type"])) : "post";
+    if (
+      $pagenow === "edit.php" &&
+      $post_type === "post" &&
+      current_user_can("edit_posts") &&
+      Settings::get("modern_posts", true)
+    ) {
+      wp_safe_redirect(admin_url("admin.php?page=aurora-admin-posts"));
+      exit;
+    }
   }
 
   public static function render()
@@ -160,6 +177,7 @@ class SubApps
       "userName" => wp_get_current_user()->display_name,
       "roles" => $roles,
       "tablePrefix" => $wpdb->prefix,
+      "newPostUrl" => esc_url_raw(admin_url("post-new.php")),
     ];
     $root_id = "aurora-admin-" . self::PAGES[$page]["entry"] . "-root";
     ?>