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)/contribuyentes/addons-dialog.tsx

@@ -67,7 +67,7 @@ export function AddonsDialog({
 
   return (
     <Dialog open={!!target} onOpenChange={(o) => !o && onClose()}>
-      <DialogContent className="max-w-[95vw] md:max-w-2xl">
+      <DialogContent className="max-w-2xl">
         <DialogHeader>
           <DialogTitle className="flex items-center gap-2"><Sparkles className="h-5 w-5 text-amber-500" /> Add-ons — {target?.nombre}</DialogTitle>
         </DialogHeader>