feat(boards): Inline-Modals (Add-Board/Add-Bookmark/Rename) mit View-Transition-Fade

src/js/boards.js

@@ -270,8 +270,22 @@ function bindBoardListEvents(list, board) {
 }
 
 // ---- MODALS ----
-function openModal(id)  { document.getElementById(id).classList.add('active'); }
+// reduced-motion kappt das Fade ueber den ungeschichteten @media-Block.
-function closeModal(id) { document.getElementById(id).classList.remove('active'); }
+// Feature-Detection-Fallback (Firefox < 144): instant.
+function openModal(id)  {
+  if (document.startViewTransition) {
+    document.startViewTransition(() => document.getElementById(id).classList.add('active'));
+  } else {
+    document.getElementById(id).classList.add('active');
+  }
+}
+function closeModal(id) {
+  if (document.startViewTransition) {
+    document.startViewTransition(() => document.getElementById(id).classList.remove('active'));
+  } else {
+    document.getElementById(id).classList.remove('active');
+  }
+}
 
 function openAddBoardModal() {
   document.getElementById('newBoardName').value = '';