feat(05-01): create archive query helper for Elementor integration

Add DDHH_JM_Archive class to modify job archive queries. Ensures
Elementor Loop Grid displays only published jobs sorted by date
(newest first) with no pagination limit.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

includes/class-archive.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * Archive class
+ *
+ * Handles job archive query modifications for Elementor template integration
+ *
+ * @package DDHH_Job_Manager
+ */
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Archive class
+ */
+class DDHH_JM_Archive {
+
+	/**
+	 * Initialize hooks
+	 */
+	public static function setup_hooks() {
+		// Modify archive query for published jobs
+		add_action( 'pre_get_posts', array( __CLASS__, 'modify_archive_query' ), 10 );
+	}
+
+	/**
+	 * Modify job archive query to show only published jobs
+	 *
+	 * @param WP_Query $query The WordPress Query object.
+	 */
+	public static function modify_archive_query( $query ) {
+		// Only modify job_offer archive queries on the frontend
+		if ( is_admin() || ! $query->is_main_query() ) {
+			return;
+		}
+
+		// Check if this is a job_offer archive
+		if ( ! $query->is_post_type_archive( 'job_offer' ) ) {
+			return;
+		}
+
+		// Set query parameters for published jobs
+		$query->set( 'post_status', 'publish' );
+		$query->set( 'orderby', 'date' );
+		$query->set( 'order', 'DESC' );
+		$query->set( 'posts_per_page', -1 );
+	}
+}

includes/class-ddhh-job-manager.php

@@ -65,6 +65,9 @@ class DDHH_JM_Job_Manager {
 		// Initialize notifications
 		add_action( 'init', array( 'DDHH_JM_Notifications', 'setup_hooks' ) );
 
+		// Initialize archive query helper
+		add_action( 'init', array( 'DDHH_JM_Archive', 'setup_hooks' ) );
+
 		// Initialize admin UI enhancements (admin-only)
 		if ( is_admin() ) {
 			add_action( 'init', array( 'DDHH_JM_Admin_UI', 'setup_hooks' ) );