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

- Add Sheet primitive component for mobile drawers
- Add MobileNav with hamburger menu for dashboard layout
- Hide desktop sidebars on mobile; show mobile header
- Make dashboard header responsive with stacked layout on small screens
- Hide selector text on mobile, show icons only
- Convert fixed-width filters to responsive widths (CFDI, Clientes, Admin, Documentos, Alertas)
- Cap dialog widths to 95vw on mobile (CFDI viewer, Documentos, Reportes, Contribuyentes, Facturación)
- Make calendar grid smaller and use single-letter weekdays on mobile
- Update viewport to include viewport-fit=cover for Samsung safe areas

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

@@ -205,9 +205,9 @@ export default function ClientesPage() {
               <Calendar className="h-5 w-5 text-muted-foreground" />
               <div className="flex items-center gap-2 text-sm">
                 <span className="text-muted-foreground">Periodo:</span>
-                <Input type="date" value={from} onChange={(e) => setFrom(e.target.value)} className="w-[150px]" />
+                <Input type="date" value={from} onChange={(e) => setFrom(e.target.value)} className="w-full sm:w-[150px]" />
                 <span className="text-muted-foreground">a</span>
-                <Input type="date" value={to} onChange={(e) => setTo(e.target.value)} className="w-[150px]" />
+                <Input type="date" value={to} onChange={(e) => setTo(e.target.value)} className="w-full sm:w-[150px]" />
               </div>
             </div>
             <Button onClick={() => setShowForm(true)}>
@@ -369,7 +369,7 @@ export default function ClientesPage() {
             onClick={() => setUsuariosTenantId(null)}
           >
             <div
-              className="bg-background rounded-lg max-w-2xl w-full max-h-[80vh] overflow-y-auto"
+              className="bg-background rounded-lg max-w-[95vw] md:max-w-2xl w-full max-h-[80vh] overflow-y-auto"
               onClick={(e) => e.stopPropagation()}
             >
               <div className="p-6 border-b flex items-center justify-between">