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/dashboards/src/components/MiTablero.tsx

@@ -43,7 +43,7 @@ export default function MiTablero({ alCambiarAcciones }: { alCambiarAcciones: (a
   const funnel = resumen ? funnelMisLeads(resumen.misLeads) : []
 
   return (
-    <main className="mx-auto max-w-[1280px] px-4 py-8 sm:px-6">
+    <main className="px-4 py-8 sm:px-6 lg:px-8">
       <div className="mb-8">
         <h1 className="text-xl font-semibold text-[#111827] dark:text-[#E2E8F0]">Mi tablero</h1>
         {resumen && (
@@ -70,7 +70,7 @@ export default function MiTablero({ alCambiarAcciones }: { alCambiarAcciones: (a
 
       {resumen && (
         <>
-          <section aria-label="Mis indicadores" className="grid gap-4 grid-cols-2 lg:grid-cols-4">
+          <section aria-label="Mis indicadores" className="grid gap-4 grid-cols-2 md:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5">
             <KpiCard
               titulo="Mis leads activos"
               valor={resumen.misLeads.length}

apps/dashboards/src/components/TableroGeneral.tsx

@@ -88,7 +88,7 @@ export default function TableroGeneral({
   const sinCobranza = resumen !== null && resumen.cobranza.planesAlCorriente + resumen.cobranza.planesConVencidos === 0
 
   return (
-    <main className="mx-auto max-w-[1280px] px-4 py-8 sm:px-6">
+    <main className="px-4 py-8 sm:px-6 lg:px-8">
       <div className="mb-8">
         <h1 className="text-xl font-semibold text-[#111827] dark:text-[#E2E8F0]">Tablero comercial</h1>
         {resumen && (
@@ -109,7 +109,7 @@ export default function TableroGeneral({
 
       {resumen && (
         <>
-          <section aria-label="Indicadores clave" className="grid gap-4 grid-cols-2 lg:grid-cols-4">
+          <section aria-label="Indicadores clave" className="grid gap-4 grid-cols-2 md:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5">
             <KpiCard
               titulo="Leads totales"
               valor={resumen.leads.total}