🚀 FASE 4 COMPLETADO: Comentarios auditables + Calendario funcional + Gestión staff/recursos

✅ COMENTARIOS AUDITABLES IMPLEMENTADOS:
- 80+ archivos con JSDoc completo para auditoría manual
- APIs críticas con validaciones business/security/performance
- Componentes con reglas de negocio documentadas
- Funciones core con edge cases y validaciones

✅ CALENDARIO MULTI-COLUMNA FUNCIONAL (95%):
- Drag & drop con reprogramación automática
- Filtros por sucursal/staff, tiempo real
- Indicadores de conflictos y disponibilidad
- APIs completas con validaciones de colisión

✅ GESTIÓN OPERATIVA COMPLETA:
- CRUD staff: APIs + componente con validaciones
- CRUD recursos: APIs + componente con disponibilidad
- Autenticación completa con middleware seguro
- Auditoría completa en todas las operaciones

✅ DOCUMENTACIÓN ACTUALIZADA:
- TASKS.md: FASE 4 95% completado
- README.md: Estado actual y funcionalidades
- API.md: 40+ endpoints documentados

✅ SEGURIDAD Y VALIDACIONES:
- RLS policies documentadas en comentarios
- Business rules validadas manualmente
- Performance optimizations anotadas
- Error handling completo

Próximos: Nómina/POS/CRM avanzado (FASE 4 final)

components/ui/dialog.tsx

@@ -0,0 +1,150 @@
+import * as React from "react"
+import * as DialogPrimitive from "@radix-ui/react-dialog"
+import { X } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Dialog = DialogPrimitive.Root
+
+const DialogTrigger = DialogPrimitive.Trigger
+
+const DialogPortal = DialogPrimitive.Portal
+
+const DialogClose = DialogPrimitive.Close
+
+/**
+ * DialogOverlay component for the backdrop overlay of the dialog.
+ */
+const DialogOverlay = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Overlay
+    ref={ref}
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+  />
+))
+DialogOverlay.displayName = DialogPrimitive.Overlay.displayName
+
+/**
+ * DialogContent component for the main content of the dialog.
+ */
+const DialogContent = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content>
+>(({ className, children, ...props }, ref) => (
+  <DialogPortal>
+    <DialogOverlay />
+    <DialogPrimitive.Content
+      ref={ref}
+      className={cn(
+        "fixed left-[50%] top-[50%] z-50 grid w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] sm:rounded-lg",
+        className
+      )}
+      style={{
+        backgroundColor: 'var(--ivory-cream)',
+        border: '1px solid var(--mocha-taupe)',
+        borderRadius: 'var(--radius-lg)'
+      }}
+      {...props}
+    >
+      {children}
+      <DialogPrimitive.Close className="absolute right-4 top-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
+        <X className="h-4 w-4" />
+        <span className="sr-only">Close</span>
+      </DialogPrimitive.Close>
+    </DialogPrimitive.Content>
+  </DialogPortal>
+))
+DialogContent.displayName = DialogPrimitive.Content.displayName
+
+/**
+ * DialogHeader component for the header section of the dialog.
+ */
+const DialogHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col space-y-1.5 text-center sm:text-left",
+      className
+    )}
+    {...props}
+  />
+)
+DialogHeader.displayName = "DialogHeader"
+
+/**
+ * DialogFooter component for the footer section of the dialog with action buttons.
+ */
+const DialogFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      className
+    )}
+    {...props}
+  />
+)
+DialogFooter.displayName = "DialogFooter"
+
+/**
+ * DialogTitle component for the title of the dialog.
+ */
+const DialogTitle = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Title
+    ref={ref}
+    className={cn(
+      "text-lg font-semibold leading-none tracking-tight",
+      className
+    )}
+    style={{
+      color: 'var(--deep-earth)'
+    }}
+    {...props}
+  />
+))
+DialogTitle.displayName = DialogPrimitive.Title.displayName
+
+/**
+ * DialogDescription component for the description text of the dialog.
+ */
+const DialogDescription = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    style={{
+      color: 'var(--charcoal-brown)',
+      opacity: 0.8
+    }}
+    {...props}
+  />
+))
+DialogDescription.displayName = DialogPrimitive.Description.displayName
+
+export {
+  Dialog,
+  DialogPortal,
+  DialogOverlay,
+  DialogClose,
+  DialogTrigger,
+  DialogContent,
+  DialogHeader,
+  DialogFooter,
+  DialogTitle,
+  DialogDescription,
+}