Revert "feat(ui): make dashboard responsive for iPhone and mobile devices"

This reverts commit d3b326e.

The deployment caused reports of blank screens and 400 errors. Reverting to restore stable state while investigating root cause.

apps/web/app/(dashboard)/facturacion/page.tsx

@@ -812,7 +812,7 @@ export default function FacturacionPage() {
       {/* Modal de búsqueda de conceptos previos */}
       {showConceptoSearch && (
         <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50">
-          <div className="bg-white dark:bg-zinc-900 rounded-xl shadow-2xl w-full max-w-[95vw] md:max-w-3xl max-h-[80vh] flex flex-col m-4">
+          <div className="bg-white dark:bg-zinc-900 rounded-xl shadow-2xl w-full max-w-3xl max-h-[80vh] flex flex-col m-4">
             <div className="flex items-center justify-between p-4 border-b">
               <h3 className="text-lg font-semibold">Buscar Concepto en Facturas</h3>
               <Button variant="ghost" size="icon" onClick={() => setShowConceptoSearch(false)}>