feat(admin): replace app name with dashboard icon in breadcrumb root

src/features/admin/components/AdminTop.js

@@ -2,7 +2,7 @@
 
 import { Fragment } from 'react';
 import { Menu, MenuButton, MenuItem, MenuItems, Transition } from '@headlessui/react';
-import { ChevronDownIcon, User03Icon } from '@zen/core/shared/icons';
+import { ChevronDownIcon, User03Icon, DashboardSquare03Icon } from '@zen/core/shared/icons';
 import { UserAvatar } from '@zen/core/shared/components';
 import { useRouter, usePathname } from 'next/navigation';
 import { getPages } from '../registry.js';
@@ -36,12 +36,12 @@ const AdminTop = ({ isMobileMenuOpen, setIsMobileMenuOpen, user, onLogout, appNa
     const themeLabel = theme === 'light' ? 'Mode clair' : theme === 'dark' ? 'Mode sombre' : 'Thème système';
 
     const buildBreadcrumbs = () => {
-        const crumbs = [{ label: appName, href: '/admin/dashboard' }];
+        const crumbs = [{ icon: DashboardSquare03Icon, href: '/admin/dashboard' }];
         const after = pathname.replace(/^\/admin\/?/, '');
         if (!after) return crumbs;
 
         const segments = after.split('/').filter(Boolean);
-        if (!segments.length) return crumbs;
+        if (!segments.length || (segments[0] === 'dashboard' && segments.length === 1)) return crumbs;
 
         const [first, second] = segments;
         const allItems = navigationSections.flatMap(s => s.items);
@@ -93,7 +93,14 @@ const AdminTop = ({ isMobileMenuOpen, setIsMobileMenuOpen, user, onLogout, appNa
                                         <polyline points="9 18 15 12 9 6" />
                                     </svg>
                                 )}
-                                {crumb.href ? (
+                                {crumb.icon ? (
+                                    <button
+                                        onClick={() => router.push(crumb.href)}
+                                        className="text-neutral-500 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white transition-colors cursor-pointer"
+                                    >
+                                        <crumb.icon className="w-4 h-4" />
+                                    </button>
+                                ) : crumb.href ? (
                                     <button
                                         onClick={() => router.push(crumb.href)}
                                         className="text-neutral-500 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white transition-colors cursor-pointer"