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/separator/Separator.vue

@@ -0,0 +1,29 @@
+<script setup lang="ts">
+import type { SeparatorProps } from 'reka-ui'
+import type { HTMLAttributes } from 'vue'
+import { reactiveOmit } from '@vueuse/core'
+import { Separator } from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+const props = withDefaults(defineProps<
+  SeparatorProps & { class?: HTMLAttributes['class'] }
+>(), {
+  orientation: 'horizontal',
+  decorative: true,
+})
+
+const delegatedProps = reactiveOmit(props, 'class')
+</script>
+
+<template>
+  <Separator
+    data-slot="separator"
+    v-bind="delegatedProps"
+    :class="
+      cn(
+        'shrink-0 bg-border data-[orientation=horizontal]:h-px data-[orientation=horizontal]:w-full data-[orientation=vertical]:w-px data-[orientation=vertical]:self-stretch',
+        props.class,
+      )
+    "
+  />
+</template>