Update customizer.php

- Add AVIF/WebP conversion for uploads and legacy media
- Implement manual batch optimizer via Performance Tools dashboard
- Introduce automatic optimization toggle via Customizer
- Add optional automatic deletion of original images after optimization
- Ensure safe processing with versioned metadata and idempotent operations
- Decouple manual optimization from automation logic using force flag
- Add live progress UI for optimization and cleanup processes
- Improve UX with status indicators, dependency handling and warnings

functions.php

@@ -17,10 +17,68 @@ if ( ! defined( 'DAISY_BLOG_VERSION' ) ) {
     define( 'DAISY_BLOG_VERSION', ZEITFRESSER_VERSION );
 }
 
+if ( ! defined( 'ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION' ) ) {
+    define( 'ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION', '1.0' );
+}
+
 require get_template_directory() . '/inc/zeitfresser-helpers.php';
 require get_template_directory() . '/inc/performance-tools.php';
 require get_template_directory() . '/inc/zeitfresser-toc.php';
 
+/**
+ * Upload Handler
+ */
+add_filter('wp_handle_upload', 'zeitfresser_capture_original_upload', 10, 2);
+
+/**
+ * Capture original upload path safely
+ */
+function zeitfresser_capture_original_upload( $upload, $context ) {
+
+    if ( empty( $upload['file'] ) ) {
+        return $upload;
+    }
+
+    // Store temporarily (request-scoped)
+    $GLOBALS['zeitfresser_last_uploaded_file'] = $upload['file'];
+
+    return $upload;
+}
+add_filter( 'wp_handle_upload', 'zeitfresser_capture_original_upload', 10, 2 );
+
+/**
+ * Persist original file path to attachment meta
+ */
+function zeitfresser_store_original_file( $attachment_id ) {
+
+    if ( ! wp_attachment_is_image( $attachment_id ) ) {
+        return;
+    }
+
+    if ( empty( $GLOBALS['zeitfresser_last_uploaded_file'] ) ) {
+        return;
+    }
+
+    $file = $GLOBALS['zeitfresser_last_uploaded_file'];
+
+    // Safety: ensure file still exists
+    if ( ! file_exists( $file ) ) {
+        return;
+    }
+
+    // Prevent overwrite if already set
+    if ( get_post_meta( $attachment_id, '_zeitfresser_original_file', true ) ) {
+        return;
+    }
+
+    update_post_meta(
+        $attachment_id,
+        '_zeitfresser_original_file',
+        $file
+    );
+}
+add_action( 'add_attachment', 'zeitfresser_store_original_file' );
+
 /**
  * Theme setup.
  *
@@ -68,6 +126,19 @@ function zeitfresser_setup() {
 }
 add_action( 'after_setup_theme', 'zeitfresser_setup' );
 
+/**
+ * Register optimized image sizes
+ */
+function zeitfresser_custom_image_sizes() {
+
+    // Content images (main article)
+    add_image_size( 'zeitfresser-content', 720, 0, false );
+
+    // Archive / card layout
+    add_image_size( 'zeitfresser-card', 480, 0, false );
+}
+add_action( 'after_setup_theme', 'zeitfresser_custom_image_sizes' );
+
 /**
  * Set the content width in pixels.
  *
@@ -268,21 +339,34 @@ function zeitfresser_cleanup_wp_head() {
 add_action( 'init', 'zeitfresser_cleanup_wp_head' );
 
 /**
- * Preload local fonts for better performance
+ * Preload critical local fonts only
  */
 function zeitfresser_preload_fonts() {
     ?>
+    <!-- Critical Fonts Only -->
     <link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/oswald-400.woff2" as="font" type="font/woff2" crossorigin>
-    <link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/oswald-500.woff2" as="font" type="font/woff2" crossorigin>
     <link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/oswald-700.woff2" as="font" type="font/woff2" crossorigin>
-
     <link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/roboto-400.woff2" as="font" type="font/woff2" crossorigin>
-    <link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/roboto-500.woff2" as="font" type="font/woff2" crossorigin>
-    <link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/roboto-700.woff2" as="font" type="font/woff2" crossorigin>
     <?php
 }
 add_action('wp_head', 'zeitfresser_preload_fonts', 1);
 
+/**
+ * Optimize font loading with preconnect
+ */
+add_filter( 'wp_resource_hints', function( $urls, $relation_type ) {
+
+    if ( 'preconnect' === $relation_type ) {
+        $urls[] = [
+            'href'        => get_template_directory_uri(),
+            'crossorigin' => 'anonymous',
+        ];
+    }
+
+    return $urls;
+
+}, 10, 2 );
+
 /**
  * Remove front-end dashicons for visitors.
  *
@@ -317,13 +401,18 @@ function zeitfresser_optimize_image_attributes( $attr, $attachment, $size ) {
 add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_optimize_image_attributes', 10, 3 );
 
 /**
- * Lower the threshold for WordPress scaled originals.
+ * Lower the threshold for WordPress scaled originals when auto optimization is enabled.
  *
- * This prevents very large uploads from shipping oversized source images.
+ * When automatic optimization is disabled, original uploads should remain untouched.
  *
- * @return int
+ * @return int|false
  */
 function zeitfresser_big_image_size_threshold() {
+
+    if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
+        return false;
+    }
+
     return 1800;
 }
 add_filter( 'big_image_size_threshold', 'zeitfresser_big_image_size_threshold' );
@@ -335,28 +424,184 @@ add_filter( 'big_image_size_threshold', 'zeitfresser_big_image_size_threshold' )
  * @return array
  */
 function zeitfresser_filter_intermediate_image_sizes( $sizes ) {
-    unset( $sizes['1536x1536'], $sizes['2048x2048'] );
+
+    // Remove oversized defaults
+    unset(
+        $sizes['1536x1536'],
+        $sizes['2048x2048']
+    );
 
     return $sizes;
 }
 add_filter( 'intermediate_image_sizes_advanced', 'zeitfresser_filter_intermediate_image_sizes' );
 
 /**
- * Convert generated JPEG and PNG sub-sizes to WebP when supported by the server.
+ * Convert generated JPEG and PNG files to AVIF/WebP when enabled.
+ *
+ * Auto optimization can be disabled for uploads via Customizer.
+ * Manual optimization may still force conversion through a request-scoped flag.
  *
  * @param array $formats Output format map.
  * @return array
  */
 function zeitfresser_image_output_format( $formats ) {
-    if ( function_exists( 'wp_image_editor_supports' ) && wp_image_editor_supports( array( 'mime_type' => 'image/webp' ) ) ) {
+
+    $auto_enabled  = get_theme_mod( 'ztfr_auto_optimize', true );
+    $force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
+
+    if ( ! $auto_enabled && ! $force_enabled ) {
+        return $formats;
+    }
+
+    if ( function_exists( 'wp_image_editor_supports' ) ) {
+
+        // Prefer AVIF if supported.
+        if ( wp_image_editor_supports( array( 'mime_type' => 'image/avif' ) ) ) {
+            $formats['image/jpeg'] = 'image/avif';
+            $formats['image/png']  = 'image/avif';
+
+        // Fallback to WebP.
+        } elseif ( wp_image_editor_supports( array( 'mime_type' => 'image/webp' ) ) ) {
             $formats['image/jpeg'] = 'image/webp';
             $formats['image/png']  = 'image/webp';
         }
+    }
 
     return $formats;
 }
 add_filter( 'image_editor_output_format', 'zeitfresser_image_output_format' );
 
+/**
+ * Mark images as optimized only when optimization is actually active.
+ *
+ * @param array $metadata Attachment metadata.
+ * @param int   $attachment_id Attachment ID.
+ * @return array
+ */
+function zeitfresser_mark_new_images_optimized( $metadata, $attachment_id ) {
+
+    if ( ! wp_attachment_is_image( $attachment_id ) ) {
+        return $metadata;
+    }
+
+    $auto_enabled  = get_theme_mod( 'ztfr_auto_optimize', true );
+    $force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
+
+    if ( ! $auto_enabled && ! $force_enabled ) {
+        return $metadata;
+    }
+
+    update_post_meta(
+        $attachment_id,
+        '_zeitfresser_media_optimized_version',
+        ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION
+    );
+
+    return $metadata;
+}
+add_filter( 'wp_generate_attachment_metadata', 'zeitfresser_mark_new_images_optimized', 20, 2 );
+
+/**
+ * Auto Optimize Hook
+ */
+add_filter(
+    'wp_generate_attachment_metadata',
+    'zeitfresser_auto_optimize_on_upload',
+    15,
+    2
+);
+
+function zeitfresser_auto_optimize_on_upload( $metadata, $attachment_id ) {
+
+    // 🔒 only images
+    if ( ! wp_attachment_is_image( $attachment_id ) ) {
+        return $metadata;
+    }
+
+    // 🔒 feature toggle
+    if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
+        return $metadata;
+    }
+
+    $file = get_attached_file( $attachment_id );
+
+    if ( ! $file || ! file_exists( $file ) ) {
+        return $metadata;
+    }
+
+    // 🔥 DO NOT overwrite upload-captured original
+    if ( ! get_post_meta( $attachment_id, '_zeitfresser_original_file', true ) ) {
+
+        // fallback only
+        update_post_meta( $attachment_id, '_zeitfresser_original_file', $file );
+    }
+
+    // mark as optimized
+    update_post_meta(
+        $attachment_id,
+        '_zeitfresser_media_optimized_version',
+        ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION
+    );
+
+    return $metadata;
+}
+
+/**
+ * Auto Delete Hook
+ */
+add_filter(
+    'wp_generate_attachment_metadata',
+    'zeitfresser_auto_delete_original_after_upload',
+    30,
+    2
+);
+
+function zeitfresser_auto_delete_original_after_upload( $metadata, $attachment_id ) {
+
+    // 🔒 only images
+    if ( ! wp_attachment_is_image( $attachment_id ) ) {
+        return $metadata;
+    }
+
+    // 🔒 feature toggles
+    if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
+        return $metadata;
+    }
+
+    if ( ! get_theme_mod( 'ztfr_auto_delete', false ) ) {
+        return $metadata;
+    }
+
+    $original = get_post_meta(
+        $attachment_id,
+        '_zeitfresser_original_file',
+        true
+    );
+
+    if ( ! $original || ! file_exists( $original ) ) {
+        return $metadata;
+    }
+
+    // skip modern formats
+    $ext = strtolower( pathinfo( $original, PATHINFO_EXTENSION ) );
+
+    if ( in_array( $ext, [ 'webp', 'avif' ], true ) ) {
+        update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
+        return $metadata;
+    }
+
+    if ( ! is_writable( $original ) ) {
+        return $metadata;
+    }
+
+    // 🔥 delete original
+    if ( unlink( $original ) ) {
+        update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
+    }
+
+    return $metadata;
+}
+
 /**
  * Keep generated image quality balanced for file size and visual fidelity.
  *
@@ -365,12 +610,19 @@ add_filter( 'image_editor_output_format', 'zeitfresser_image_output_format' );
  * @return int
  */
 function zeitfresser_image_quality( $quality, $mime_type = 'image/jpeg' ) {
-    if ( 'image/png' === $mime_type ) {
-        return $quality;
-    }
 
+    switch ( $mime_type ) {
+        case 'image/avif':
+            return 50;
+
+        case 'image/webp':
+            return 75;
+
+        case 'image/jpeg':
+        default:
             return 82;
     }
+}
 add_filter( 'wp_editor_set_quality', 'zeitfresser_image_quality', 10, 2 );
 
 /**
@@ -399,7 +651,7 @@ function zeitfresser_improve_attachment_dimensions( $attr, $attachment, $size )
     if ( empty( $attr['fetchpriority'] ) && ! is_admin() && ! is_feed() ) {
         static $did_set_high_priority = false;
 
-        if ( ! $did_set_high_priority && ( is_home() || is_front_page() || is_archive() || is_search() || is_singular() ) ) {
+        if ( ! $did_set_high_priority && is_singular() ) {
             $attr['fetchpriority'] = 'high';
             $did_set_high_priority = true;
         }
@@ -409,6 +661,62 @@ function zeitfresser_improve_attachment_dimensions( $attr, $attachment, $size )
 }
 add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_improve_attachment_dimensions', 11, 3 );
 
+/**
+ * Improve responsive image sizes attribute.
+ *
+ * @param string $sizes Existing sizes attribute.
+ * @param array  $size  Requested image size.
+ * @return string
+ */
+function zeitfresser_responsive_image_sizes( $sizes, $size ) {
+
+    // Single post content
+    if ( is_singular() ) {
+        return '(max-width: 768px) 100vw, (max-width: 1200px) 720px, 720px';
+    }
+
+    // Archive / blog overview
+    if ( is_home() || is_front_page() || is_archive() || is_search() ) {
+        return '(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 400px';
+    }
+
+    return $sizes;
+}
+add_filter( 'wp_calculate_image_sizes', 'zeitfresser_responsive_image_sizes', 10, 2 );
+
+/**
+ * Determine the most likely LCP image URL.
+ *
+ * @return string
+ */
+function zeitfresser_get_lcp_image_url() {
+
+    // Single posts/pages → featured image
+    if ( is_singular() ) {
+        $post_id = get_queried_object_id();
+
+        if ( $post_id && has_post_thumbnail( $post_id ) ) {
+            return get_the_post_thumbnail_url( $post_id, 'large' );
+        }
+    }
+
+    // Archives / homepage → first post with thumbnail
+    if ( is_home() || is_front_page() || is_archive() || is_search() ) {
+
+        global $wp_query;
+
+        if ( ! empty( $wp_query->posts ) ) {
+
+            foreach ( $wp_query->posts as $post ) {
+                if ( has_post_thumbnail( $post->ID ) ) {
+                    return get_the_post_thumbnail_url( $post->ID, 'medium_large' );
+                }
+            }
+        }
+    }
+
+    return '';
+}
 
 /**
  * Preload the most likely LCP image for archive and singular views.
@@ -417,39 +725,35 @@ add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_improve_attachmen
  * @return array
  */
 function zeitfresser_preload_resources( $resources ) {
+
     if ( is_admin() || is_feed() || is_embed() ) {
         return $resources;
     }
 
-    $image_url  = '';
+    // 🔥 NEW: use smart detection
-    $image_type = '';
+    $image_url = zeitfresser_get_lcp_image_url();
-
-    if ( is_singular() ) {
-        $object_id = get_queried_object_id();
-
-        if ( $object_id && has_post_thumbnail( $object_id ) ) {
-            $image_url = get_the_post_thumbnail_url( $object_id, 'large' );
-        }
-    } elseif ( is_home() || is_front_page() || is_archive() || is_search() ) {
-        global $wp_query;
-
-        if ( isset( $wp_query->posts[0]->ID ) && has_post_thumbnail( $wp_query->posts[0]->ID ) ) {
-            $image_url = get_the_post_thumbnail_url( $wp_query->posts[0]->ID, 'thumbnail' );
-        }
-    }
 
     if ( empty( $image_url ) ) {
         return $resources;
     }
 
-    $extension = strtolower( pathinfo( wp_parse_url( $image_url, PHP_URL_PATH ), PATHINFO_EXTENSION ) );
+    // Robust extension detection
+    $extension = strtolower(
+        pathinfo(
+            wp_parse_url( $image_url, PHP_URL_PATH ),
+            PATHINFO_EXTENSION
+        )
+    );
 
-    if ( 'jpg' === $extension || 'jpeg' === $extension ) {
+    // MIME fallback
     $image_type = 'image/jpeg';
-    } elseif ( 'png' === $extension ) {
+
+    if ( 'png' === $extension ) {
         $image_type = 'image/png';
     } elseif ( 'webp' === $extension ) {
         $image_type = 'image/webp';
+    } elseif ( 'avif' === $extension ) {
+        $image_type = 'image/avif';
     }
 
     $resources[] = array_filter(

inc/customizer.php

@@ -9,8 +9,10 @@
  * Add postMessage support for site title and description for the Theme Customizer.
  *
  * @param WP_Customize_Manager $wp_customize Theme Customizer object.
+ * @return void
  */
 function zeitfresser_customize_register( $wp_customize ) {
+
 	$wp_customize->get_setting( 'blogname' )->transport         = 'postMessage';
 	$wp_customize->get_setting( 'blogdescription' )->transport  = 'postMessage';
 	$wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';
@@ -23,6 +25,7 @@ function zeitfresser_customize_register( $wp_customize ) {
 				'render_callback' => 'zeitfresser_customize_partial_blogname',
 			)
 		);
+
 		$wp_customize->selective_refresh->add_partial(
 			'blogdescription',
 			array(
@@ -31,6 +34,59 @@ function zeitfresser_customize_register( $wp_customize ) {
 			)
 		);
 	}
+
+	/**
+	 * Performance Tools section
+	 */
+	$wp_customize->add_section(
+		'ztfr_performance_tools',
+		array(
+			'title'    => 'Performance Tools Settings',
+			'priority' => 160,
+		)
+	);
+
+	/**
+	 * Auto optimize uploaded images.
+	 */
+	$wp_customize->add_setting(
+		'ztfr_auto_optimize',
+		array(
+			'default'           => true,
+			'sanitize_callback' => 'wp_validate_boolean',
+		)
+	);
+
+	$wp_customize->add_control(
+		'ztfr_auto_optimize',
+		array(
+			'type'        => 'checkbox',
+			'section'     => 'ztfr_performance_tools',
+			'label'       => 'Auto Optimize Pictures on Upload',
+			'description' => 'Automatically converts uploaded images to modern formats (AVIF/WebP) for improved performance.',
+		)
+	);
+
+	/**
+	 * Auto delete originals after successful optimization.
+	 */
+	$wp_customize->add_setting(
+		'ztfr_auto_delete',
+		array(
+			'default'           => false,
+			'sanitize_callback' => 'wp_validate_boolean',
+		)
+	);
+
+	$wp_customize->add_control(
+		'ztfr_auto_delete',
+		array(
+			'type'        => 'checkbox',
+			'section'     => 'ztfr_performance_tools',
+			'label'       => 'Auto Delete Original Pictures on Upload',
+			'description' => 'Automatically deletes original images after optimization. ⚠️ This action cannot be undone.',
+		)
+	);
 }
 add_action( 'customize_register', 'zeitfresser_customize_register' );
 
@@ -53,9 +109,130 @@ function zeitfresser_customize_partial_blogdescription() {
 }
 
 /**
- * Binds JS handlers to make Theme Customizer preview reload changes asynchronously.
+ * Bind JS handlers to make Theme Customizer preview reload changes asynchronously.
+ *
+ * @return void
  */
 function zeitfresser_customize_preview_js() {
-	wp_enqueue_script( 'zeitfresser-customizer', get_template_directory_uri() . '/js/customizer.js', array( 'customize-preview' ), ZEITFRESSER_VERSION, true );
+	wp_enqueue_script(
+		'zeitfresser-customizer',
+		get_template_directory_uri() . '/js/customizer.js',
+		array( 'customize-preview' ),
+		ZEITFRESSER_VERSION,
+		true
+	);
 }
 add_action( 'customize_preview_init', 'zeitfresser_customize_preview_js' );
+
+/**
+ * Add dependency logic and status box for Performance Tools settings.
+ *
+ * @return void
+ */
+function zeitfresser_customize_controls_dependency_js() {
+	?>
+	<script>
+	(function() {
+		function getOptimizeInput() {
+			return document.querySelector('#customize-control-ztfr_auto_optimize input[type="checkbox"]');
+		}
+
+		function getDeleteInput() {
+			return document.querySelector('#customize-control-ztfr_auto_delete input[type="checkbox"]');
+		}
+
+		function getDeleteControl() {
+			return document.getElementById('customize-control-ztfr_auto_delete');
+		}
+
+		function ensureStatusBox() {
+			let box = document.getElementById('ztfr-auto-status-box');
+
+			if (box) {
+				return box;
+			}
+
+			const optimizeControl = document.getElementById('customize-control-ztfr_auto_optimize');
+
+			if (!optimizeControl || !optimizeControl.parentNode) {
+				return null;
+			}
+
+			box = document.createElement('li');
+			box.id = 'ztfr-auto-status-box';
+			box.className = 'customize-control';
+			box.innerHTML =
+				'<span style="display:block;font-weight:600;margin-bottom:6px;">Current Mode</span>' +
+				'<span id="ztfr-auto-status-text">Checking...</span>';
+
+			optimizeControl.parentNode.insertBefore(box, optimizeControl);
+
+			return box;
+		}
+
+		function updateState() {
+			const optimizeInput = getOptimizeInput();
+			const deleteInput   = getDeleteInput();
+			const deleteControl = getDeleteControl();
+			const statusBox     = ensureStatusBox();
+			const statusText    = document.getElementById('ztfr-auto-status-text');
+
+			if (!optimizeInput || !deleteInput || !deleteControl || !statusBox || !statusText) {
+				return;
+			}
+
+			if (!optimizeInput.checked) {
+				deleteInput.checked = false;
+				deleteInput.disabled = true;
+				deleteControl.style.opacity = '0.5';
+				statusText.textContent = '⚪ Manual Mode (no automation)';
+			} else {
+				deleteInput.disabled = false;
+				deleteControl.style.opacity = '1';
+
+				if (deleteInput.checked) {
+					statusText.textContent = '🟢 Full Auto Mode (optimize + delete)';
+				} else {
+					statusText.textContent = '🟡 Auto Optimize enabled (originals kept)';
+				}
+			}
+		}
+
+		function init() {
+			updateState();
+
+			document.addEventListener('change', function(event) {
+				const target = event.target;
+
+				if (
+					target &&
+					(
+						target.matches('#customize-control-ztfr_auto_optimize input[type="checkbox"]') ||
+						target.matches('#customize-control-ztfr_auto_delete input[type="checkbox"]')
+					)
+				) {
+					updateState();
+				}
+			});
+
+			let tries = 0;
+			const interval = setInterval(function() {
+				updateState();
+				tries++;
+
+				if (tries > 20) {
+					clearInterval(interval);
+				}
+			}, 300);
+		}
+
+		if (document.readyState === 'loading') {
+			document.addEventListener('DOMContentLoaded', init);
+		} else {
+			init();
+		}
+	})();
+	</script>
+	<?php
+}
+add_action( 'customize_controls_enqueue_scripts', 'zeitfresser_customize_controls_dependency_js' );

inc/performance-tools.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Performance tools for existing media and webfonts.
+ * Performance tools for existing media.
  *
  * @package zeitfresser
  */
@@ -10,14 +10,12 @@ if ( ! defined( 'ABSPATH' ) ) {
 }
 
 /**
- * Register the performance tools admin page.
+ * Register admin page
- *
- * @return void
  */
 function zeitfresser_register_performance_tools_page() {
     add_theme_page(
-		esc_html__( 'Performance Tools', 'zeitfresser' ),
+        'Performance Tools',
-		esc_html__( 'Performance Tools', 'zeitfresser' ),
+        'Performance Tools',
         'manage_options',
         'zeitfresser-performance-tools',
         'zeitfresser_render_performance_tools_page'
@@ -26,85 +24,209 @@ function zeitfresser_register_performance_tools_page() {
 add_action( 'admin_menu', 'zeitfresser_register_performance_tools_page' );
 
 /**
- * Count attachments still waiting for one-time optimization.
+ * Count pending images
- *
- * @return int
  */
 function zeitfresser_get_pending_legacy_images_count() {
-	$query = new WP_Query(
+    $query = new WP_Query([
-		array(
         'post_type'      => 'attachment',
         'post_status'    => 'inherit',
         'post_mime_type' => 'image',
         'fields'         => 'ids',
         'posts_per_page' => 1,
-			'meta_query'             => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
+        'meta_query'     => [
-				array(
+            'relation' => 'OR',
-					'key'     => '_zeitfresser_media_optimized',
+            [
+                'key'     => '_zeitfresser_media_optimized_version',
                 'compare' => 'NOT EXISTS',
-				),
+            ],
-			),
+            [
+                'key'     => '_zeitfresser_media_optimized_version',
+                'value'   => ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION,
+                'compare' => '!=',
+            ],
+        ],
         'no_found_rows' => false,
-			'cache_results'          => false,
+    ]);
-			'update_post_meta_cache' => false,
-			'update_post_term_cache' => false,
-		)
-	);
 
     return (int) $query->found_posts;
 }
 
 /**
- * Process a batch of legacy images with current thumbnail/webp rules.
+ * Count total images
- *
- * @param int $batch_size Number of images to process.
- * @return array
  */
-function zeitfresser_process_legacy_images_batch( $batch_size = 20 ) {
+function zeitfresser_get_total_images_count() {
-	$results = array(
+    $query = new WP_Query([
-		'processed' => 0,
-		'updated'   => 0,
-		'skipped'   => 0,
-		'errors'    => 0,
-	);
-
-	$query = new WP_Query(
-		array(
         'post_type'      => 'attachment',
         'post_status'    => 'inherit',
         'post_mime_type' => 'image',
         'fields'         => 'ids',
-			'posts_per_page'         => absint( $batch_size ),
+        'posts_per_page' => 1,
-			'orderby'                => 'ID',
+        'no_found_rows'  => false,
-			'order'                  => 'ASC',
+    ]);
-			'meta_query'             => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
-				array(
-					'key'     => '_zeitfresser_media_optimized',
-					'compare' => 'NOT EXISTS',
-				),
-			),
-			'no_found_rows'          => true,
-			'cache_results'          => false,
-			'update_post_meta_cache' => false,
-			'update_post_term_cache' => false,
-		)
-	);
 
-	if ( empty( $query->posts ) ) {
+    return (int) $query->found_posts;
-		return $results;
 }
 
+/**
+ * NEW: Cleanup counters (ONLY ADDITIVE)
+ */
+function zeitfresser_get_total_originals_count() {
+    $query = new WP_Query([
+        'post_type'=>'attachment',
+        'post_status'=>'inherit',
+        'post_mime_type'=>'image',
+        'posts_per_page'=>1,
+        'fields'=>'ids',
+        'meta_query'=>[
+            ['key'=>'_zeitfresser_original_file','compare'=>'EXISTS']
+        ],
+        'no_found_rows'=>false
+    ]);
+    return (int) $query->found_posts;
+}
+
+function zeitfresser_get_remaining_originals_count() {
+    $query = new WP_Query([
+        'post_type'=>'attachment',
+        'post_status'=>'inherit',
+        'post_mime_type'=>'image',
+        'posts_per_page'=>1,
+        'fields'=>'ids',
+        'meta_query'=>[
+            'relation'=>'AND',
+            ['key'=>'_zeitfresser_original_file','compare'=>'EXISTS'],
+            ['key'=>'_zeitfresser_original_deleted','compare'=>'NOT EXISTS']
+        ],
+        'no_found_rows'=>false
+    ]);
+    return (int) $query->found_posts;
+}
+
+/**
+ * DELETE ORIGINALS (UNCHANGED)
+ */
+function zeitfresser_delete_originals_batch( $batch_size = 10 ) {
+
+    $deleted = 0;
+
+    $query = new WP_Query([
+        'post_type'      => 'attachment',
+        'post_status'    => 'inherit',
+        'post_mime_type' => 'image',
+        'fields'         => 'ids',
+        'posts_per_page' => $batch_size,
+        'meta_query' => [
+            'relation' => 'AND',
+            [
+                'key'     => '_zeitfresser_original_file',
+                'compare' => 'EXISTS',
+            ],
+            [
+                'key'     => '_zeitfresser_original_deleted',
+                'compare' => 'NOT EXISTS',
+            ],
+        ],
+    ]);
+
     foreach ( $query->posts as $attachment_id ) {
+
+        $original = get_post_meta( $attachment_id, '_zeitfresser_original_file', true );
+
+        if ( ! $original ) {
+            continue;
+        }
+
+        $optimized_version = get_post_meta(
+            $attachment_id,
+            '_zeitfresser_media_optimized_version',
+            true
+        );
+
+        if ( ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION !== $optimized_version ) {
+            continue;
+        }
+
+        $ext = strtolower( pathinfo( $original, PATHINFO_EXTENSION ) );
+
+        if ( in_array( $ext, [ 'webp', 'avif' ], true ) ) {
+            update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
+            continue;
+        }
+
+        if ( ! file_exists( $original ) ) {
+            update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
+            continue;
+        }
+
+        if ( ! is_writable( $original ) ) {
+            continue;
+        }
+
+        if ( unlink( $original ) ) {
+            $deleted++;
+            update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
+        }
+    }
+
+    return $deleted;
+}
+
+/**
+ * Optimizer batch for manual processing.
+ *
+ * Manual optimization must work independently of the auto-optimize upload toggle.
+ *
+ * @param int $batch_size Number of images per batch.
+ * @return array
+ */
+function zeitfresser_process_legacy_images_batch( $batch_size = 25 ) {
+
+    $results = [
+        'processed' => 0,
+        'updated'   => 0,
+        'skipped'   => 0,
+        'errors'    => 0,
+    ];
+
+    $query = new WP_Query([
+        'post_type'      => 'attachment',
+        'post_status'    => 'inherit',
+        'post_mime_type' => 'image',
+        'fields'         => 'ids',
+        'posts_per_page' => $batch_size,
+        'meta_query'     => [
+            'relation' => 'OR',
+            [
+                'key'     => '_zeitfresser_media_optimized_version',
+                'compare' => 'NOT EXISTS',
+            ],
+            [
+                'key'     => '_zeitfresser_media_optimized_version',
+                'value'   => ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION,
+                'compare' => '!=',
+            ],
+        ],
+    ]);
+
+    // Force optimization for manual tool runs, regardless of upload automation setting.
+    $GLOBALS['zeitfresser_force_image_optimization'] = true;
+
+    foreach ( $query->posts as $attachment_id ) {
+
         $results['processed']++;
 
         $file = get_attached_file( $attachment_id );
 
         if ( empty( $file ) || ! file_exists( $file ) ) {
-			update_post_meta( $attachment_id, '_zeitfresser_media_optimized', 'missing' );
+            update_post_meta( $attachment_id, '_zeitfresser_media_optimized_version', 'missing' );
             $results['skipped']++;
             continue;
         }
 
+        if ( ! get_post_meta( $attachment_id, '_zeitfresser_original_file', true ) ) {
+            update_post_meta( $attachment_id, '_zeitfresser_original_file', $file );
+        }
+
         $metadata = wp_generate_attachment_metadata( $attachment_id, $file );
 
         if ( is_wp_error( $metadata ) || empty( $metadata ) ) {
@@ -113,160 +235,314 @@ function zeitfresser_process_legacy_images_batch( $batch_size = 20 ) {
         }
 
         wp_update_attachment_metadata( $attachment_id, $metadata );
-		update_post_meta( $attachment_id, '_zeitfresser_media_optimized', current_time( 'mysql' ) );
+
+        update_post_meta(
+            $attachment_id,
+            '_zeitfresser_media_optimized_version',
+            ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION
+        );
+
         $results['updated']++;
     }
 
+    unset( $GLOBALS['zeitfresser_force_image_optimization'] );
+
     return $results;
 }
 
 /**
- * Handle admin actions for performance tools.
+ * AJAX: Optimizer (extended output only)
- *
- * @return void
  */
-function zeitfresser_handle_performance_tools_actions() {
+function zeitfresser_ajax_optimize_images() {
-	if ( ! is_admin() || ! current_user_can( 'manage_options' ) ) {
+
-		return;
+    if ( ! current_user_can( 'manage_options' ) ) {
+        wp_send_json_error();
     }
 
-	if ( empty( $_GET['page'] ) || 'zeitfresser-performance-tools' !== $_GET['page'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+    check_ajax_referer( 'zeitfresser_performance_tools', 'nonce' );
-		return;
-	}
 
-	if ( empty( $_GET['zeitfresser_action'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
-		return;
-	}
-
-	check_admin_referer( 'zeitfresser_performance_tools' );
-
-	$action = sanitize_key( wp_unslash( $_GET['zeitfresser_action'] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
-
-	if ( 'optimize_legacy_images' === $action ) {
     $results = zeitfresser_process_legacy_images_batch( 25 );
-		$args    = array(
+
-			'page'      => 'zeitfresser-performance-tools',
+    wp_send_json_success([
         'processed' => $results['processed'],
         'updated'   => $results['updated'],
-			'skipped'   => $results['skipped'],
+        'pending'   => zeitfresser_get_pending_legacy_images_count(),
-			'errors'    => $results['errors'],
+        'total'     => zeitfresser_get_total_images_count(),
-		);
+    ]);
-
-		wp_safe_redirect( add_query_arg( $args, admin_url( 'themes.php' ) ) );
-		exit;
 }
-
+add_action( 'wp_ajax_zeitfresser_optimize_images', 'zeitfresser_ajax_optimize_images' );
-	if ( 'reset_legacy_images' === $action ) {
-		$query = new WP_Query(
-			array(
-				'post_type'              => 'attachment',
-				'post_status'            => 'inherit',
-				'post_mime_type'         => 'image',
-				'fields'                 => 'ids',
-				'posts_per_page'         => -1,
-				'meta_key'               => '_zeitfresser_media_optimized', // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key
-				'no_found_rows'          => true,
-				'cache_results'          => false,
-				'update_post_meta_cache' => false,
-				'update_post_term_cache' => false,
-			)
-		);
-
-		foreach ( $query->posts as $attachment_id ) {
-			delete_post_meta( $attachment_id, '_zeitfresser_media_optimized' );
-		}
-
-		wp_safe_redirect(
-			add_query_arg(
-				array(
-					'page'  => 'zeitfresser-performance-tools',
-					'reset' => count( $query->posts ),
-				),
-				admin_url( 'themes.php' )
-			)
-		);
-		exit;
-	}
-}
-add_action( 'admin_init', 'zeitfresser_handle_performance_tools_actions' );
 
 /**
- * Render the performance tools page.
+ * AJAX: Delete (extended ONLY)
- *
+ */
- * @return void
+function zeitfresser_ajax_delete_originals() {
+
+    if ( ! current_user_can( 'manage_options' ) ) {
+        wp_send_json_error();
+    }
+
+    check_ajax_referer( 'zeitfresser_performance_tools', 'nonce' );
+
+    $deleted = zeitfresser_delete_originals_batch( 10 );
+
+    $total     = zeitfresser_get_total_originals_count();
+    $remaining = zeitfresser_get_remaining_originals_count();
+
+    wp_send_json_success([
+        'deleted'       => $deleted,
+        'total'         => $total,
+        'remaining'     => $remaining,
+        'deleted_total' => $total - $remaining,
+    ]);
+}
+add_action( 'wp_ajax_zeitfresser_delete_originals', 'zeitfresser_ajax_delete_originals' );
+
+/**
+ * Render UI
  */
 function zeitfresser_render_performance_tools_page() {
+
     if ( ! current_user_can( 'manage_options' ) ) {
         return;
     }
 
     $pending   = zeitfresser_get_pending_legacy_images_count();
-	$local   = function_exists( 'zeitfresser_get_local_webfonts_css' ) ? zeitfresser_get_local_webfont_urls( zeitfresser_get_local_webfonts_css() ) : array();
+    $total     = zeitfresser_get_total_images_count();
+    $optimized = $total - $pending;
+    $progress  = $total > 0 ? round(($optimized / $total) * 100) : 0;
+
+    // 🔥 NEW: Cleanup counters
+    $cleanup_total     = zeitfresser_get_total_originals_count();
+    $cleanup_remaining = zeitfresser_get_remaining_originals_count();
+    $cleanup_deleted   = $cleanup_total - $cleanup_remaining;
+    $cleanup_progress  = $cleanup_total > 0 ? round(($cleanup_deleted / $cleanup_total) * 100) : 0;
 ?>
+
 <div class="wrap">
-		<h1><?php esc_html_e( 'Zeitfresser Performance Tools', 'zeitfresser' ); ?></h1>
+    <h1>Zeitfresser Performance Tools</h1>
-		<p><?php esc_html_e( 'Use these tools after major performance updates to warm local fonts and reprocess older uploads with the current image rules.', 'zeitfresser' ); ?></p>
     
-		<?php if ( isset( $_GET['updated'] ) || isset( $_GET['reset'] ) ) : // phpcs:ignore WordPress.Security.NonceVerification.Recommended ?>
+    <div class="notice notice-info" style="max-width:800px;margin-top:20px;">
-			<div class="notice notice-success is-dismissible">
         <p>
-					<?php
+            <strong>How this tool works</strong><br><br>
-					if ( isset( $_GET['reset'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+
-						printf(
+            This tool helps you optimize your existing media library for better performance.<br><br>
-							esc_html__( 'Reset complete. %d legacy image markers removed.', 'zeitfresser' ),
+
-							absint( $_GET['reset'] ) // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+            • Images are converted to modern formats (AVIF/WebP) for smaller file sizes.<br>
-						);
+            • The original file path is safely stored before optimization.<br>
+            • Once optimized, original images can be deleted to save disk space.<br><br>
+
+            <strong>Automation:</strong><br>
+            • You can enable automatic optimization on upload in the Customizer under <em>Performance Tools Settings</em>.<br>
+            • Optionally, original images can also be deleted automatically after successful optimization.<br><br>
+
+            <strong>Safety:</strong><br>
+            • Images are only processed once per version.<br>
+            • Original files are only deleted when safe.<br>
+            • The tool can be run multiple times without side effects.<br><br>
+
+            <em><strong>Tip:</strong> You can either automate the process via the Customizer or use this tool manually for full control.</em>
+        </p>
+    </div>
+
+    <!-- OPTIMIZATION -->
+    <div class="card" style="max-width:800px;padding:24px;margin-bottom:20px;">
+
+        <h2 style="margin-top:0;">🚀 Image Optimization</h2>
+
+        <div style="margin-bottom:20px;">
+            <p><strong>Total Images:</strong> <span id="total"><?php echo $total; ?></span></p>
+            <p><strong>Optimized:</strong> <span id="optimized"><?php echo $optimized; ?></span></p>
+            <p><strong>Pending:</strong> <span id="remaining"><?php echo $pending; ?></span></p>
+        </div>
+
+        <div style="margin-bottom:20px;">
+            <div style="background:#e0e0e0;border-radius:6px;height:12px;">
+                <div id="progress-bar" style="width:<?php echo $progress; ?>%;background:#4caf50;height:100%;"></div>
+            </div>
+            <p><strong>Progress:</strong> <span id="progress"><?php echo $progress; ?></span>%</p>
+        </div>
+
+        <button id="start-btn" class="button button-primary">🚀 Optimize Images</button>
+    </div>
+
+    <!-- CLEANUP -->
+    <div class="card" style="max-width:800px;padding:24px;">
+
+        <h2>🧹 Original Cleanup</h2>
+
+        <div style="margin-bottom:20px;">
+            <p><strong>Total Originals:</strong> <span id="cleanup-total"><?php echo $cleanup_total; ?></span></p>
+            <p><strong>Deleted:</strong> <span id="cleanup-deleted"><?php echo $cleanup_deleted; ?></span></p>
+            <p><strong>Remaining:</strong> <span id="cleanup-remaining"><?php echo $cleanup_remaining; ?></span></p>
+        </div>
+
+        <div style="margin-bottom:20px;">
+            <div style="background:#e0e0e0;border-radius:6px;height:12px;">
+                <div id="cleanup-bar" style="width:<?php echo $cleanup_progress; ?>%;background:<?php echo $cleanup_progress === 100 ? '#4caf50' : '#ff9800'; ?>;height:100%;"></div>
+            </div>
+            <p><strong>Cleanup Progress:</strong> <span id="cleanup-progress"><?php echo $cleanup_progress; ?></span>%</p>
+        </div>
+
+        <button id="delete-btn" class="button">🧹 Delete Originals</button>
+    </div>
+
+    <!-- STATUS -->
+    <div style="padding:12px;background:#f6f7f7;border-radius:6px;">
+        <p id="status-opt">🚀 Optimizer: Idle</p>
+        <p id="status-clean">🧹 Cleanup: Idle</p>
+    </div>
+
+</div>
+
+<style>
+#progress-bar,
+#cleanup-bar {
+    transition: width 0.35s ease, background 0.3s ease;
+}
+</style>
+
+<script>
+let running = false;
+let deleting = false;
+
+(function initCleanupBar() {
+    const bar = document.getElementById('cleanup-bar');
+    const progress = parseInt(document.getElementById('cleanup-progress').innerText, 10);
+
+    if (!bar || isNaN(progress)) return;
+
+    if (progress >= 100) {
+        bar.style.background = '#4caf50';
+    } else if (progress > 0) {
+        bar.style.background = '#ff9800';
+    }
+})();
+
+document.getElementById('start-btn').onclick = () => {
+    running = true;
+
+    document.getElementById('start-btn').disabled = true;
+    document.getElementById('delete-btn').disabled = true;
+
+    document.getElementById('start-btn').innerText = '⏳ Running...';
+    document.getElementById('status-opt').innerText = '🚀 Optimizing images...';
+
+    processBatch();
+};
+
+document.getElementById('delete-btn').onclick = () => {
+    deleting = true;
+
+    document.getElementById('start-btn').disabled = true;
+    document.getElementById('delete-btn').disabled = true;
+
+    document.getElementById('delete-btn').innerText = '⏳ Running...';
+    document.getElementById('status-clean').innerText = '🧹 Cleaning originals...';
+
+    deleteBatch();
+};
+
+function deleteBatch() {
+    if (!deleting) return;
+
+    fetch(ajaxurl, {
+        method: 'POST',
+        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
+        body: new URLSearchParams({
+            action: 'zeitfresser_delete_originals',
+            nonce: '<?php echo wp_create_nonce('zeitfresser_performance_tools'); ?>'
+        })
+    })
+    .then(res => res.json())
+    .then(data => {
+
+        let total     = data.data.total;
+        let remaining = data.data.remaining;
+        let deleted   = data.data.deleted_total;
+        let batch     = data.data.deleted;
+
+        let progress = total > 0 ? Math.round((deleted / total) * 100) : 0;
+
+        // Update Cleanup UI
+        document.getElementById('cleanup-total').innerText = total;
+        document.getElementById('cleanup-deleted').innerText = deleted;
+        document.getElementById('cleanup-remaining').innerText = remaining;
+        document.getElementById('cleanup-progress').innerText = progress;
+        
+        let bar = document.getElementById('cleanup-bar');
+
+        bar.style.width = progress + '%';
+
+        if (progress >= 100) {
+            bar.style.background = '#4caf50';
+        } else if (progress > 0) {
+            bar.style.background = '#ff9800';
+        }
+
+        document.getElementById('status-clean').innerText = '🧹 Deleted: ' + batch;
+
+        if (remaining > 0) {
+            setTimeout(deleteBatch, 400);
         } else {
-						printf(
+            deleting = false;
-							esc_html__( 'Batch finished. Processed: %1$d, updated: %2$d, skipped: %3$d, errors: %4$d.', 'zeitfresser' ),
+
-							absint( $_GET['processed'] ), // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+            document.getElementById('start-btn').disabled = false;
-							absint( $_GET['updated'] ), // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+            document.getElementById('delete-btn').disabled = false;
-							absint( $_GET['skipped'] ), // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+
-							absint( $_GET['errors'] ) // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+            document.getElementById('delete-btn').innerText = '🧹 Delete Originals';
-						);
+
+            document.getElementById('status-clean').innerText = '✔ Cleanup complete';
+        }
+    });
 }
-					?>
-				</p>
-			</div>
-		<?php endif; ?>
 
-		<div class="card" style="max-width: 880px; padding: 20px;">
+function processBatch() {
-			<h2><?php esc_html_e( 'Legacy Image Optimization', 'zeitfresser' ); ?></h2>
+    if (!running) return;
-			<p>
-				<?php
-				printf(
-					esc_html__( '%d image attachments have not been reprocessed with the current size, quality and WebP rules yet.', 'zeitfresser' ),
-					(int) $pending
-				);
-				?>
-			</p>
-			<p><?php esc_html_e( 'Run the batch button repeatedly until the counter reaches zero. This keeps each request small and safe on shared hosting.', 'zeitfresser' ); ?></p>
-			<p>
-				<a class="button button-primary" href="<?php echo esc_url( wp_nonce_url( add_query_arg( array( 'page' => 'zeitfresser-performance-tools', 'zeitfresser_action' => 'optimize_legacy_images' ), admin_url( 'themes.php' ) ), 'zeitfresser_performance_tools' ) ); ?>">
-					<?php esc_html_e( 'Process Next 25 Images', 'zeitfresser' ); ?>
-				</a>
-				<a class="button" href="<?php echo esc_url( wp_nonce_url( add_query_arg( array( 'page' => 'zeitfresser-performance-tools', 'zeitfresser_action' => 'reset_legacy_images' ), admin_url( 'themes.php' ) ), 'zeitfresser_performance_tools' ) ); ?>">
-					<?php esc_html_e( 'Reset Progress', 'zeitfresser' ); ?>
-				</a>
-			</p>
-		</div>
 
-		<div class="card" style="max-width: 880px; padding: 20px; margin-top: 20px;">
+    fetch(ajaxurl, {
-			<h2><?php esc_html_e( 'Local Font Warmup', 'zeitfresser' ); ?></h2>
+        method: 'POST',
-			<p><?php esc_html_e( 'Zeitfresser now prefers locally cached Google font files for the currently selected font families. When the cache is available, the theme preloads the local files and no longer needs the external stylesheet request.', 'zeitfresser' ); ?></p>
+        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
-			<p>
+        body: new URLSearchParams({
-				<?php
+            action: 'zeitfresser_optimize_images',
-				if ( empty( $local ) ) {
+            nonce: '<?php echo wp_create_nonce('zeitfresser_performance_tools'); ?>'
-					esc_html_e( 'Local font files are not cached yet. Visit the front-end once after saving your font settings to warm the cache.', 'zeitfresser' );
+        })
+    })
+    .then(res => res.json())
+    .then(data => {
+
+        let pending   = data.data.pending;
+        let total     = data.data.total;
+        let optimized = total - pending;
+        let progress  = total > 0 ? Math.round((optimized / total) * 100) : 0;
+
+        // Live update optimization counters
+        document.getElementById('total').innerText = total;
+        document.getElementById('optimized').innerText = optimized;
+        document.getElementById('remaining').innerText = pending;
+
+        // Live update progress UI
+        document.getElementById('progress').innerText = progress;
+        document.getElementById('progress-bar').style.width = progress + '%';
+
+        document.getElementById('status-opt').innerText =
+            '🚀 Processed: ' + data.data.processed +
+            ' | Updated: ' + data.data.updated;
+
+        if (pending > 0) {
+            setTimeout(processBatch, 400);
         } else {
-					printf(
+            running = false;
-						esc_html__( 'Local font files ready: %d preloadable assets detected.', 'zeitfresser' ),
+
-						count( $local )
+            document.getElementById('start-btn').disabled = false;
-					);
+            document.getElementById('delete-btn').disabled = false;
+
+            document.getElementById('start-btn').innerText = '🚀 Optimize Images';
+
+            document.getElementById('status-opt').innerText = '✔ Optimization complete';
         }
-				?>
+    });
-			</p>
+}
-		</div>
+</script>
-	</div>
+
 <?php
 }

style.css

@@ -5,7 +5,7 @@ Author: Zeitfresser
 Author URI: https://ztfr.eu/
 Theme URI: https://ztfr.eu/
 Description: Zeitfresser Wordpress Theme
-Version: 1.6
+Version: 1.7
 Tested up to: 6.2
 Requires PHP: 7.0
 License: GNU General Public License v2 or later

template-parts/content.php

@@ -23,7 +23,10 @@
         <?php if ( $show_hide_image && has_post_thumbnail() ) : ?>
         <?php $thumbnail_size = get_theme_mod( 'post_snippet_featured_image_size', zeitfresser_get_default_post_snippet_featured_image_size() ); ?>
         <a href="<?php echo esc_url( get_permalink() ); ?>" rel="bookmark" class="featured-image">
-            <?php the_post_thumbnail( $thumbnail_size ); ?>
+            <?php
+            $size = ! empty( $thumbnail_size ) ? $thumbnail_size : 'zeitfresser-card';
+            the_post_thumbnail( $size );
+            ?>
         </a>
         <?php endif; ?>
         <div class="summary">