refactor: flatten src/AKSRT → src (drop theme-identifier dir)

Move all domain folders from src/AKSRT/{Domain} to src/{Domain}; remap
Composer PSR-4 "AKSRT\\": "src/"; update audit script + README + ADR
paths; remove dead tools/build-psr4-map.php (scanned deleted inc/classes).

src/User/BadgeAutoAward.php

@@ -0,0 +1,82 @@
+<?php
+/**
+ * Auto-grant medals from catalog thresholds (zibll zib_auto_add_user_medal lite).
+ *
+ * @package AKSRT
+ */
+
+namespace AKSRT\User;
+
+defined('ABSPATH') || exit;
+
+class BadgeAutoAward {
+
+	private static $instance = null;
+
+	public static function get_instance(): self {
+		if (null === self::$instance) {
+			self::$instance = new self();
+		}
+		return self::$instance;
+	}
+
+	public function init(): void {
+		// Run after login / current user bootstrap.
+		add_action('wp_login', [$this, 'on_login'], 20, 2);
+		add_action('wp', [$this, 'maybe_for_current_user'], 30);
+		// Cheap hooks for common counters.
+		add_action('publish_post', [$this, 'on_content_change'], 20, 1);
+		add_action('comment_post', [$this, 'on_content_change'], 20, 1);
+		add_action('aksrt_user_followed', [$this, 'on_follow'], 20, 2);
+		add_action('aksrt_checkin_done', [$this, 'on_checkin'], 20, 1);
+	}
+
+	public function on_login($user_login, $user): void {
+		if ($user instanceof \WP_User) {
+			$this->evaluate((int) $user->ID);
+		}
+	}
+
+	public function maybe_for_current_user(): void {
+		if (!is_user_logged_in() || is_admin()) {
+			return;
+		}
+		// Throttle: once per 10 minutes per user.
+		$uid = get_current_user_id();
+		$key = 'aksrt_badge_auto_' . $uid;
+		if (get_transient($key)) {
+			return;
+		}
+		set_transient($key, 1, 10 * MINUTE_IN_SECONDS);
+		$this->evaluate($uid);
+	}
+
+	public function on_content_change($arg = null): void {
+		$uid = get_current_user_id();
+		if ($uid > 0) {
+			$this->evaluate($uid);
+		}
+	}
+
+	public function on_follow(int $follower_id, int $following_id): void {
+		if ($following_id > 0) {
+			$this->evaluate($following_id);
+		}
+		if ($follower_id > 0) {
+			$this->evaluate($follower_id);
+		}
+	}
+
+	public function on_checkin(int $user_id): void {
+		if ($user_id > 0) {
+			$this->evaluate($user_id);
+		}
+	}
+
+	public function evaluate(int $user_id): void {
+		if ($user_id <= 0 || !class_exists('\AKSRT\User\Badges') || !Badges::enabled()) {
+			return;
+		}
+		Badges::auto_evaluate($user_id);
+	}
+}