feat(users): govern profiles and access

Normalize fixed profile fields, profile actions, and the five-column capability matrix for comments, uploads, and downloads.

src/Settings/Settings.php

@@ -573,7 +573,7 @@ class Settings {
     /**
      * Private user-center display settings.
      *
-     * @return array{tabs:string[],avatar_upload:bool,cover_upload:bool,social_links:bool}
+     * @return array{tabs:string[]}
      */
     public static function get_user_center_settings(): array {
         return UserRuntime::get_user_center_settings();
@@ -705,7 +705,7 @@ class Settings {
     /**
      * Comment display and behavior settings.
      *
-     * @return array{order:string,pagination_mode:string,nested_depth:int,require_login:bool,allow_reply:bool,avatar_size:int,empty_text:string}
+     * @return array{order:string,pagination_mode:string,nested_depth:int,require_login:bool,avatar_size:int,empty_text:string}
      */
     public static function get_comment_display_settings(): array {
         return PostDisplay::get_comment_display_settings();