Migración a shadcn-vue + Tailwind CSS v4

- Tailwind CSS v4 con @tailwindcss/vite
- shadcn-vue: 19 componentes UI (button, card, dialog, table, select,
  tabs, sidebar, separator, breadcrumb, badge, avatar, dropdown-menu,
  tooltip, input, switch, sheet, skeleton)
- Sidebar collapsible con íconos Lucide
- Theme Teloprax en CSS variables (rojo #E63946, negro #1A1A2E)
- LoginView, DashboardView, CalendarView, SchedulerView migrados
- Eliminado AppShell.vue manual (reemplazado por SidebarProvider)
- Layout con breadcrumb, sidebar trigger, header unificado

src/components/ui/table/utils.ts

@@ -0,0 +1,10 @@
+import type { Updater } from '@tanstack/vue-table'
+
+import type { Ref } from 'vue'
+import { isFunction } from '@tanstack/vue-table'
+
+export function valueUpdater<T>(updaterOrValue: Updater<T>, ref: Ref<T>) {
+  ref.value = isFunction(updaterOrValue)
+    ? updaterOrValue(ref.value)
+    : updaterOrValue
+}