fix(responsive): layout 100% width en todas las resoluciones

- Eliminado max-w-[1280px] de todas las apps (mi-dia, landing, cotizador, cobranza, dashboards, alta-clientes)
- Kanban: sin restricción de ancho, columnas min-w-[220px]
- Grids: xl:grid-cols-4/5 para pantallas grandes
- CSS base: -webkit-text-size-adjust + min-h-screen
- 6 apps construidas

apps/mi-dia/src/components/KanbanView.tsx

@@ -57,15 +57,15 @@ export default function KanbanView({ leads, onCambiarEstado }: KanbanViewProps)
   }
 
   return (
-    <div className="flex gap-4 overflow-x-auto pb-4">
+    <div className="flex gap-4 overflow-x-auto scroll-smooth pb-4">
       {COLUMNAS.map((col) => (
         <div
           key={col.id}
-          className={`flex min-w-[260px] flex-1 flex-col rounded-xl border border-[#E5E7EB] bg-[#F8FAFC] dark:border-[#334155] dark:bg-[#0F172A] border-t-4 ${col.color}`}
+          className={`flex min-w-[220px] flex-1 flex-col rounded-xl border border-[#E5E7EB] bg-[#F8FAFC] dark:border-[#334155] dark:bg-[#0F172A] border-t-4 ${col.color}`}
           onDragOver={onDragOver}
           onDrop={() => onDrop(col.id)}
         >
-          <div className="flex items-center justify-between px-4 pt-3 pb-2">
+          <div className="flex items-center justify-between px-3 pt-3 pb-2 sm:px-4">
             <h4 className="text-xs font-semibold uppercase tracking-wider text-[#64748B] dark:text-[#94A3B8]">
               {col.titulo}
             </h4>
@@ -83,7 +83,7 @@ export default function KanbanView({ leads, onCambiarEstado }: KanbanViewProps)
                   draggable
                   onDragStart={() => onDragStart(lead.id)}
                   onDragEnd={() => setDragId(null)}
-                  className={`rounded-lg border border-[#E5E7EB] bg-white p-3 shadow-sm dark:border-[#1E293B] dark:bg-[#1E293B] cursor-grab transition-opacity ${
+                  className={`rounded-lg border border-[#E5E7EB] bg-white p-2.5 shadow-sm dark:border-[#1E293B] dark:bg-[#1E293B] cursor-grab transition-opacity sm:p-3 ${
                     dragId === lead.id ? 'opacity-50' : ''
                   }`}
                 >