feat: add page template hover label

Add visual feedback for hovered page templates:
- Display "@page {templateName}" label on page edge hover
- Label positioned at top-left of page with 30% opacity
- Orange background matching page highlight color
- Automatically removed when hovering elements or clicking

Ensures consistent UX between page and element hover states.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

public/assets/css/pagedjs-interface.css

@@ -178,6 +178,20 @@
   font-family: sans-serif;
 }
 
+.page-hover-label {
+  position: absolute;
+  background: #ff8a50;
+  color: white;
+  padding: 0.25rem 0.5rem;
+  border-radius: 4px;
+  font-size: 0.875rem;
+  font-weight: 600;
+  opacity: 0.3;
+  pointer-events: none;
+  z-index: 9999;
+  font-family: sans-serif;
+}
+
 /* Marks (to delete when merge in paged.js) */
 
 .pagedjs_marks-crop {

src/App.vue

@@ -75,7 +75,13 @@ const getSelectorFromElement = (element) => {
   const tagName = element.tagName.toLowerCase();
   // Filter out state classes (element-hovered, element-selected, page-hovered, page-selected)
   const classes = Array.from(element.classList).filter(
-    (cls) => !['element-hovered', 'element-selected', 'page-hovered', 'page-selected'].includes(cls)
+    (cls) =>
+      ![
+        'element-hovered',
+        'element-selected',
+        'page-hovered',
+        'page-selected',
+      ].includes(cls)
   );
   if (classes.length > 0) {
     return `${tagName}.${classes[0]}`;
@@ -98,7 +104,7 @@ const createElementLabel = (element) => {
   const label = doc.createElement('div');
   label.className = 'element-hover-label';
   label.textContent = getSelectorFromElement(element);
-  label.style.top = `${rect.top + scrollTop - 30}px`;
+  label.style.top = `${rect.top + scrollTop - 32}px`;
   label.style.left = `${rect.left + scrollLeft}px`;
 
   doc.body.appendChild(label);
@@ -113,6 +119,38 @@ const removeElementLabel = (doc) => {
   }
 };
 
+// Create and position page label on hover
+const createPageLabel = (page) => {
+  const doc = page.ownerDocument;
+  const existingLabel = doc.querySelector('.page-hover-label');
+  if (existingLabel) {
+    existingLabel.remove();
+  }
+
+  const rect = page.getBoundingClientRect();
+  const scrollTop = doc.documentElement.scrollTop || doc.body.scrollTop;
+  const scrollLeft = doc.documentElement.scrollLeft || doc.body.scrollLeft;
+
+  const templateName = page.getAttribute('data-page-type') || 'default';
+
+  const label = doc.createElement('div');
+  label.className = 'page-hover-label';
+  label.textContent = `@page ${templateName}`;
+  label.style.top = `${rect.top + scrollTop - 32}px`;
+  label.style.left = `${rect.left + scrollLeft}px`;
+
+  doc.body.appendChild(label);
+  return label;
+};
+
+// Remove page label
+const removePageLabel = (doc) => {
+  const label = doc.querySelector('.page-hover-label');
+  if (label) {
+    label.remove();
+  }
+};
+
 // Handle mouse movement in iframe
 const handleIframeMouseMove = (event) => {
   const pages = event.target.ownerDocument.querySelectorAll('.pagedjs_page');
@@ -133,9 +171,13 @@ const handleIframeMouseMove = (event) => {
       hoveredPage.value.classList.remove('page-hovered');
     }
 
+    // Remove previous page label
+    removePageLabel(event.target.ownerDocument);
+
     // Add highlight to new page (only if not already selected)
     if (foundPage && !selectedPages.value.includes(foundPage)) {
       foundPage.classList.add('page-hovered');
+      createPageLabel(foundPage);
     }
 
     hoveredPage.value = foundPage;
@@ -155,8 +197,9 @@ const handleIframeMouseMove = (event) => {
         hoveredElement.value.classList.remove('element-hovered');
       }
 
-      // Remove previous label
+      // Remove previous labels
       removeElementLabel(doc);
+      removePageLabel(doc);
 
       // Add highlight to new element (only if not already selected)
       if (contentElement && contentElement !== selectedElement.value) {
@@ -175,7 +218,7 @@ const handleIframeMouseMove = (event) => {
       hoveredElement.value.classList.remove('element-hovered');
       hoveredElement.value = null;
     }
-    // Remove label when hovering page edge
+    // Remove element label when hovering page edge
     removeElementLabel(event.target.ownerDocument);
   }
 };
@@ -276,6 +319,10 @@ const handleIframeClick = (event) => {
     });
     selectedPages.value = sameTemplatePages;
 
+    // Remove labels when opening popup
+    removePageLabel(doc);
+    removeElementLabel(doc);
+
     pagePopup.value.open(hoveredPage.value, event, sameTemplatePages.length);
     elementPopup.value.close();
     return;
@@ -323,12 +370,16 @@ const handleIframeClick = (event) => {
     hoveredElement.value = null;
   }
 
+  // Get document and remove labels when opening popup
+  const doc = event.target.ownerDocument;
+  removeElementLabel(doc);
+  removePageLabel(doc);
+
   // Select the new element
   selectedElement.value = contentElement;
   contentElement.classList.add('element-selected');
 
   // Get count of similar elements
-  const doc = event.target.ownerDocument;
   const count = getSimilarElementsCount(contentElement, doc);
 
   elementPopup.value.handleIframeClick(event, contentElement, count);