feat: star favoris dynamique + sidebar refresh sans reload

- page_editor: étoile ⭐/☆ dynamique selon favorited (x-text)
- toggleFavorite() appelle refreshFavorites() du sidebar
- base.html: refreshFavorites() fetch /api/library/favorites + rebuild DOM
- Context menu 'Add to Favorites' → refreshFavorites() au lieu de location.reload()
- Les items dynamiques ont onclick/oncontextmenu pour fonctionner hors Alpine

app/templates/base.html

@@ -601,6 +601,40 @@
 
       // ── Favorites tracking ──
       favoriteIds: new Set([{% for p in favorite_pages %}'{{ p.id }}'{% if not loop.last %},{% endif %}{% endfor %}]),
+      
+      refreshFavorites() {
+        const self = this;
+        fetch('/api/library/favorites', {credentials:'same-origin'})
+          .then(r => r.json())
+          .then(data => {
+            const items = data.items || [];
+            self.favoriteIds = new Set(items.map(i => i.id));
+            const favList = document.querySelector('.sidebar-items[data-section="favorites"]');
+            if (!favList) return;
+            if (items.length === 0) {
+              favList.innerHTML = '<li class="sidebar-item empty-hint"><span class="page-icon">⭐</span><span class="page-name text-dim">No favorites yet</span></li>';
+            } else {
+              favList.innerHTML = items.map(function(item) {
+                const icon = item.icon || '📄';
+                const name = (item.title || 'Untitled');
+                const safeName = name.replace(/'/g, "\\'").replace(/"/g, '&quot;');
+                const url = item.url || ('/pages/' + item.id);
+                return '<li class="sidebar-item" style="padding-left:8px;cursor:pointer" ' +
+                  'data-page-id="' + item.id + '" data-page-depth="0" data-has-children="false" ' +
+                  'onclick="window.appState.navigateTo(\'' + url + '\')" ' +
+                  'oncontextmenu="event.preventDefault();window.appState.showContextMenu(event,\'' + item.id + '\',\'' + safeName + '\')">' +
+                  '<span class="tree-toggle-placeholder"></span>' +
+                  '<span class="page-icon">' + icon + '</span>' +
+                  '<span class="page-name">' + safeName + '</span>' +
+                  '<span class="item-actions">' +
+                    '<button class="item-action-btn" title="View in Library" onclick="event.stopPropagation();window.appState.navigateTo(\'/library\')">📚</button>' +
+                    '<button class="item-action-btn" title="New sub-page" onclick="event.stopPropagation();window.appState.newSubPage(\'' + item.id + '\')">+</button>' +
+                  '</span>' +
+                '</li>';
+              }).join('');
+            }
+          });
+      },
 
       // ── Sections collapsible ──
       sectionsOpen: (function() {
@@ -727,8 +761,7 @@
                 if (isFav) self.favoriteIds.delete(pageId);
                 else self.favoriteIds.add(pageId);
                 self.contextMenu.visible = false;
-                // Reload to update sidebar
-                location.reload();
+                self.refreshFavorites();
               })
               .catch(e => this.toast('Favorite action failed', 'error'));
             break;