feat(home): drop calendar card — drawer entry is enough

Remove the "this month" card from the home menu; the calendar stays
reachable from the drawer and the /calendar route is unchanged. Also
drop the now-unused calendar.homeSubtitle i18n key (en/es/pt/ast) and
regenerate slang.

apps/app_seeds/lib/ui/home_screen.dart

@@ -102,14 +102,6 @@ class HomeScreen extends StatelessWidget {
                       onTap: () => context.push('/inventory'),
                     ),
                     const SizedBox(height: 16),
-                    _OutlinedMenuCard(
-                      key: const Key('home.calendar'),
-                      icon: Icons.calendar_month,
-                      label: t.calendar.title,
-                      subtitle: t.calendar.homeSubtitle,
-                      onTap: () => context.push('/calendar'),
-                    ),
-                    const SizedBox(height: 16),
                     _OutlinedMenuCard(
                       key: const Key('home.market'),
                       icon: Icons.storefront_outlined,