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/select/SelectTrigger.vue

@@ -0,0 +1,34 @@
+<script setup lang="ts">
+import type { SelectTriggerProps } from 'reka-ui'
+
+import type { HTMLAttributes } from 'vue'
+import { ChevronDownIcon } from '@lucide/vue'
+import { reactiveOmit } from '@vueuse/core'
+import { SelectIcon, SelectTrigger, useForwardProps } from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+const props = withDefaults(
+  defineProps<SelectTriggerProps & { class?: HTMLAttributes['class'], size?: 'sm' | 'default' }>(),
+  { size: 'default' },
+)
+
+const delegatedProps = reactiveOmit(props, 'class', 'size')
+const forwardedProps = useForwardProps(delegatedProps)
+</script>
+
+<template>
+  <SelectTrigger
+    data-slot="select-trigger"
+    :data-size="size"
+    v-bind="forwardedProps"
+    :class="cn(
+      'border-input data-placeholder:text-muted-foreground dark:bg-input/30 dark:hover:bg-input/50 focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:aria-invalid:border-destructive/50 gap-1.5 rounded-lg border bg-transparent py-2 pr-2 pl-2.5 text-sm transition-colors select-none focus-visible:ring-3 aria-invalid:ring-3 data-[size=default]:h-8 data-[size=sm]:h-7 data-[size=sm]:rounded-[min(var(--radius-md),10px)] *:data-[slot=select-value]:gap-1.5 [&_svg:not([class*=size-])]:size-4 flex w-fit items-center justify-between whitespace-nowrap outline-none disabled:cursor-not-allowed disabled:opacity-50 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center [&_svg]:pointer-events-none [&_svg]:shrink-0',
+      props.class,
+    )"
+  >
+    <slot />
+    <SelectIcon as-child>
+      <ChevronDownIcon class="text-muted-foreground size-4 pointer-events-none" />
+    </SelectIcon>
+  </SelectTrigger>
+</template>