refactor(admin): migrate page titles from static map to self-registering pages

src/features/admin/components/AdminTop.js

@@ -6,7 +6,6 @@ import { ChevronDownIcon, User03Icon, DashboardSquare03Icon } from '@zen/core/sh
 import { UserAvatar } from '@zen/core/shared/components';
 import { useRouter, usePathname } from 'next/navigation';
 import { getPages } from '../registry.js';
-import { PAGE_TITLES } from '../pages/titles.js';
 import { useTheme, getThemeIcon } from '@zen/core/themes';
 
 const AdminTop = ({ isMobileMenuOpen, setIsMobileMenuOpen, user, onLogout, appName = 'ZEN', navigationSections = [] }) => {
@@ -36,24 +35,26 @@ const AdminTop = ({ isMobileMenuOpen, setIsMobileMenuOpen, user, onLogout, appNa
     const ThemeIcon = getThemeIcon(theme, systemIsDark);
     const themeLabel = theme === 'light' ? 'Mode clair' : theme === 'dark' ? 'Mode sombre' : 'Thème système';
 
+    const getPageTitle = (s) => getPages().find(p => p.slug === s)?.title ?? s;
+
     const buildBreadcrumbs = () => {
         const crumbs = [{ icon: DashboardSquare03Icon, href: '/admin/dashboard' }];
         const after = pathname.replace(/^\/admin\/?/, '');
         if (!after) {
-            crumbs.push({ label: PAGE_TITLES.dashboard });
+            crumbs.push({ label: getPageTitle('dashboard') });
             return crumbs;
         }
 
         const segments = after.split('/').filter(Boolean);
         if (!segments.length || (segments[0] === 'dashboard' && segments.length === 1)) {
-            crumbs.push({ label: PAGE_TITLES.dashboard });
+            crumbs.push({ label: getPageTitle('dashboard') });
             return crumbs;
         }
 
         const [first, second] = segments;
 
         if (first === 'profile') {
-            crumbs.push({ label: PAGE_TITLES.profile });
+            crumbs.push({ label: getPageTitle('profile') });
             return crumbs;
         }