Fix Bilder-Auswahl (Capture-Listener) + Mobile UX verbessern

- Selection-Click nutzt jetzt addEventListener mit capture:true
  auf #main, feuert garantiert VOR Poptrox und kann nicht entfernt werden
- Bild-Name/Ordner als data-Attribute auf .thumb gespeichert
- Mobile: Nav-Icons 1rem -> 1.3rem, bessere Touch-Targets
- Mobile: Selection-Checkboxen groesser (1.8em statt 1.4em)
- Mobile: Toolbar-Buttons mit mehr Padding

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

assets/js/main.js

@@ -182,6 +182,8 @@
 
 				images.forEach(function(file) {
 					var article = $('<article class="thumb"></article>');
+					article.attr('data-name', file.name);
+					if (file.folder) article.attr('data-folder', file.folder);
 					var prefix = file.folder ? encodeURIComponent(file.folder) + '/' : '';
 					var fullPath = '/images/fulls/' + prefix + encodeURIComponent(file.name);
 					var thumbPath = '/images/thumbs/' + prefix + encodeURIComponent(file.name);
@@ -339,24 +341,18 @@
 			$toolbar.toggleClass('visible', selectionActive);
 		});
 
-		// Klick auf Thumbnail im Selection-Mode (direkt auf a.image, VOR poptrox gebunden)
-		$main.find('.thumb a.image').on('click', function(e) {
+		// Klick auf Thumbnail im Selection-Mode (Capture-Phase, feuert VOR Poptrox)
+		$main[0].addEventListener('click', function(e) {
 			if (!selectionActive) return;
+			var thumb = e.target.closest('.thumb');
+			if (!thumb) return;
+
 			e.preventDefault();
-			e.stopImmediatePropagation();
+			e.stopPropagation();
 
-			var $thumb = $(this).closest('.thumb');
-			var $img = $thumb.find('img');
-			var imgName = $img.data('name');
-			var imgHref = $(this).attr('href');
-
-			// Ordner aus href extrahieren
-			var folder = null;
-			var hrefPath = imgHref.replace('/images/fulls/', '');
-			var parts = hrefPath.split('/');
-			if (parts.length > 1) {
-				folder = decodeURIComponent(parts[0]);
-			}
+			var $thumb = $(thumb);
+			var imgName = $thumb.attr('data-name');
+			var folder = $thumb.attr('data-folder') || null;
 
 			var idx = -1;
 			for (var i = 0; i < selectedImages.length; i++) {
@@ -373,7 +369,7 @@
 				$thumb.addClass('selected');
 			}
 			updateToolbar();
-		});
+		}, true);
 
 		function updateToolbar() {
 			var count = selectedImages.length;