diff --git a/docs/frontend/frontend-architecture.md b/docs/frontend/frontend-architecture.md
index eb13e4db..c7912e25 100644
--- a/docs/frontend/frontend-architecture.md
+++ b/docs/frontend/frontend-architecture.md
@@ -82,7 +82,7 @@ RdxPageContent
 → composición de los hijos principales
 ```
 
-Regla: Las Pages no deben reconstruir estas responsabilidades con wrappers HTML locales.
+Regla: Las Pages no deben reconstruir estas responsabilidades con wrappers HTML locales. En Create/Update, la composición canónica es RdxPageFrame → RdxPageContainer → RdxPageContent: los errores inline y el editor son hijos directos de RdxPageContent; los dialogs son hermanos del frame; RdxPanel se reserva para secciones semánticas reales.
 
 ## 6. Identity y sesión
 
diff --git a/docs/frontend/ui-patterns.md b/docs/frontend/ui-patterns.md
index 9ebf8007..eaeb4d34 100644
--- a/docs/frontend/ui-patterns.md
+++ b/docs/frontend/ui-patterns.md
@@ -34,6 +34,8 @@ El controller de página concentra URL, filtros, consulta, estados y navegación
 
 ## 2. Create / Update
 
+Estructura canónica: providers → RdxPageFrame (header/content/footer) → un único RdxPageContainer → un único RdxPageContent; los dialogs son hermanos del frame.
+
 ```tsx
 <RdxPageFrame
   header={<RdxEditorHeader />}
@@ -53,6 +55,7 @@ Los errores inline no definen su propio spacing estructural. Participan del spac
 Footer y aside son opcionales. `content` es adecuado para formularios focalizados; `full` para editores documentales amplios. Create y Update deben compartir geometría cuando solo cambian defaults, submit o navegación.
 
 Loading y error bloqueante usan también `RdxPageFrame` y `RdxPageContainer`; no reconstruyen el viewport.
+El error bloqueante conserva la misma jerarquía: RdxPageFrame → RdxPageContainer → RdxPageContent → PageErrorState.
 
 ## 3. Detail
 
diff --git a/docs/frontend/ui-system.md b/docs/frontend/ui-system.md
index c3577eb7..a4b89670 100644
--- a/docs/frontend/ui-system.md
+++ b/docs/frontend/ui-system.md
@@ -108,6 +108,7 @@ Agrupa una sección con título, descripción, icono, acciones y contenido:
 
 - `variant="plain"`: sección plana con divisor; valor predeterminado.
 - `variant="card"`: superficie independiente.
+RdxPanel no sustituye un div estructural: solo representa una sección con identidad semántica, como fiscalidad, dirección o preferencias.
 
 ### `RdxFormGrid`
 
@@ -157,7 +158,7 @@ Los avisos, errores inline, secciones y contenido funcional deben ser hijos dire
   <Editor />
 </RdxPageContent>
 ```
-No deben introducirse wrappers adicionales únicamente para controlar gap, ancho, padding o centrado.
+No deben introducirse wrappers adicionales únicamente para controlar gap, ancho, padding o centrado. No se anidan RdxPageContainer ni RdxPageContent salvo razón arquitectónica explícita. Los errores inline participan como hijos directos del spacing estándar de RdxPageContent; no crean su propio layout.
 
 ## 8. Responsive y accesibilidad
 
diff --git a/docs/suppliers/frontend-suppliers-ui-ux-design.md b/docs/suppliers/frontend-suppliers-ui-ux-design.md
index 47a99cfa..b40a8ef7 100644
--- a/docs/suppliers/frontend-suppliers-ui-ux-design.md
+++ b/docs/suppliers/frontend-suppliers-ui-ux-design.md
@@ -18,7 +18,7 @@ Se adoptan de Customer:
 
 - manifest y rutas lazy por módulo;
 - páginas de listado con `RdxPageContainer`, `RdxPageHeader`, búsqueda con debounce y `DataTable`;
-- editores fullscreen con `RdxEditorPageLayout`, header persistente, protección de cambios sin guardar y secciones Rdx;
+- editores fullscreen con `RdxPageFrame`, header persistente, protección de cambios sin guardar y secciones Rdx;
 - `PageErrorState`, skeletons, alertas y toasts del sistema;
 - React Hook Form con validación Zod;
 - queries y mutations encapsuladas en hooks y adapters de transporte.
@@ -119,9 +119,9 @@ Todos los textos visibles pertenecen al namespace `Suppliers`. Se mantienen recu
 ## 17. Componentes reutilizados
 
 - `RdxPageContainer`, `RdxPageContent`, `RdxPageHeader`, `RdxPageActions`;
-- `RdxEditorPageLayout`, `RdxPanel`, `RdxFormGrid`;
+- `RdxPageFrame`, `RdxPanel`, `RdxFormGrid`;
 - `DataTable`, `SkeletonDataTable`, `DataTableColumnHeader`, `RdxRowActions`;
-- `TextField`, `SelectField`, `PageFormHeader`, `FormActionsBar`;
+- `TextField`, `SelectField`, `RdxEditorHeader`, `FormActionsBar`;
 - `SimpleSearchInput`, `PageErrorState`, `ErrorAlert`;
 - `UnsavedChangesProvider` y `useReturnToNavigation`.
 
diff --git a/modules/customer-invoices/src/web/proformas/create/ui/pages/proforma-create-page.tsx b/modules/customer-invoices/src/web/proformas/create/ui/pages/proforma-create-page.tsx
index dd1ae51a..50267e4a 100644
--- a/modules/customer-invoices/src/web/proformas/create/ui/pages/proforma-create-page.tsx
+++ b/modules/customer-invoices/src/web/proformas/create/ui/pages/proforma-create-page.tsx
@@ -34,7 +34,7 @@ export const ProformaCreatePage = () => {
           }
         >
           <RdxPageContainer width="content">
-            <RdxPageContent spacing="default">
+            <RdxPageContent>
               {createCtrl.isCreateError && (
                 <ErrorAlert
                   message={
diff --git a/modules/customer-invoices/src/web/recurring-proformas/create/recurring-proforma-create-page.tsx b/modules/customer-invoices/src/web/recurring-proformas/create/recurring-proforma-create-page.tsx
index 6eaf0af5..97f474a1 100644
--- a/modules/customer-invoices/src/web/recurring-proformas/create/recurring-proforma-create-page.tsx
+++ b/modules/customer-invoices/src/web/recurring-proformas/create/recurring-proforma-create-page.tsx
@@ -1,20 +1,13 @@
+import { ErrorAlert } from "@erp/core/components";
 import { useHookForm } from "@erp/core/hooks";
 import {
   RdxEditorHeader,
   RdxPageContainer,
   RdxPageContent,
   RdxPageFrame,
+  RdxPanel,
 } from "@repo/rdx-ui/components";
-import {
-  Button,
-  Card,
-  CardContent,
-  CardHeader,
-  CardTitle,
-  Input,
-  Label,
-  Textarea,
-} from "@repo/shadcn-ui/components";
+import { Button, Input, Label, Textarea } from "@repo/shadcn-ui/components";
 import { useState } from "react";
 import { useNavigate } from "react-router-dom";
 
@@ -89,6 +82,7 @@ export const RecurringProformaCreatePage = () => {
     >
       <RdxPageContainer width="content">
         <RdxPageContent>
+          {submitError ? <ErrorAlert message={submitError} /> : null}
           <form
             className="space-y-6"
             id={RECURRING_PROFORMA_CREATE_FORM_ID}
@@ -98,19 +92,8 @@ export const RecurringProformaCreatePage = () => {
             <p className="text-sm text-muted-foreground">
               {t("recurring_proformas.create.description")}
             </p>
-            {submitError ? (
-              <p
-                className="rounded-md border border-destructive/30 p-3 text-sm text-destructive"
-                role="alert"
-              >
-                {submitError}
-              </p>
-            ) : null}
-            <Card>
-              <CardHeader>
-                <CardTitle>{t("recurring_proformas.create.form_title")}</CardTitle>
-              </CardHeader>
-              <CardContent className="space-y-5">
+            <RdxPanel title={t("recurring_proformas.create.form_title")}>
+              <div className="space-y-5">
                 <div className="space-y-2">
                   <Label htmlFor="recurring-proforma-name">
                     {t("recurring_proformas.create.name")}
@@ -136,8 +119,8 @@ export const RecurringProformaCreatePage = () => {
                     {...form.register("description")}
                   />
                 </div>
-              </CardContent>
-            </Card>
+              </div>
+            </RdxPanel>
           </form>
         </RdxPageContent>
       </RdxPageContainer>
diff --git a/modules/customers/src/web/create/ui/pages/customer-create-page.tsx b/modules/customers/src/web/create/ui/pages/customer-create-page.tsx
index 4a67d33b..2a1cade3 100644
--- a/modules/customers/src/web/create/ui/pages/customer-create-page.tsx
+++ b/modules/customers/src/web/create/ui/pages/customer-create-page.tsx
@@ -47,7 +47,7 @@ export const CustomerCreatePage = () => {
           }
         >
           <RdxPageContainer width="content">
-            <RdxPageContent spacing="default">
+            <RdxPageContent>
               {createCtrl.isCreateError ? (
                 <ErrorAlert
                   message={(createCtrl.createError as Error)?.message ?? t("create.errors.message")}
diff --git a/modules/suppliers/src/web/create/supplier-create-page.tsx b/modules/suppliers/src/web/create/supplier-create-page.tsx
index 958295a1..85f54235 100644
--- a/modules/suppliers/src/web/create/supplier-create-page.tsx
+++ b/modules/suppliers/src/web/create/supplier-create-page.tsx
@@ -40,21 +40,17 @@ export const SupplierCreatePage = () => {
         >
           <RdxPageContainer width="content">
             <RdxPageContent>
-              <div className="rounded-2xl border border-border/60 bg-background p-4 shadow-xs md:p-6">
-                <div className="flex min-w-0 flex-col gap-6">
-                  {controller.mutation.isError ? (
-                    <ErrorAlert
-                      message={controller.mutation.error.message || t("create.error")}
-                      title={t("create.error")}
-                    />
-                  ) : null}
-                  <SupplierEditorForm
-                    formId={controller.formId}
-                    isSubmitting={controller.mutation.isPending}
-                    onSubmit={controller.onSubmit}
-                  />
-                </div>
-              </div>
+              {controller.mutation.isError ? (
+                <ErrorAlert
+                  message={controller.mutation.error.message || t("create.error")}
+                  title={t("create.error")}
+                />
+              ) : null}
+              <SupplierEditorForm
+                formId={controller.formId}
+                isSubmitting={controller.mutation.isPending}
+                onSubmit={controller.onSubmit}
+              />
             </RdxPageContent>
           </RdxPageContainer>
         </RdxPageFrame>
diff --git a/modules/suppliers/src/web/shared/ui/supplier-editor-skeleton.tsx b/modules/suppliers/src/web/shared/ui/supplier-editor-skeleton.tsx
index ad7fb8a2..7c1fbd65 100644
--- a/modules/suppliers/src/web/shared/ui/supplier-editor-skeleton.tsx
+++ b/modules/suppliers/src/web/shared/ui/supplier-editor-skeleton.tsx
@@ -1,4 +1,4 @@
-import { RdxPageContainer, RdxPageFrame } from "@repo/rdx-ui/components";
+import { RdxPageContainer, RdxPageContent, RdxPageFrame } from "@repo/rdx-ui/components";
 
 import { useTranslation } from "../../i18n";
 
@@ -19,15 +19,17 @@ export const SupplierEditorSkeleton = () => {
   return (
     <RdxPageFrame>
       <RdxPageContainer width="content">
-        <div aria-hidden className="space-y-6">
-          <div className="h-10 w-64 animate-pulse rounded-md bg-muted" />
-          <div className="grid gap-4 md:grid-cols-2">
-            {SKELETON_FIELDS.map((field) => (
-              <div className="h-16 animate-pulse rounded-md bg-muted" key={field} />
-            ))}
+        <RdxPageContent>
+          <div aria-hidden className="space-y-6">
+            <div className="h-10 w-64 animate-pulse rounded-md bg-muted" />
+            <div className="grid gap-4 md:grid-cols-2">
+              {SKELETON_FIELDS.map((field) => (
+                <div className="h-16 animate-pulse rounded-md bg-muted" key={field} />
+              ))}
+            </div>
           </div>
-        </div>
-        <span className="sr-only">{t("common.loading")}</span>
+          <span className="sr-only">{t("common.loading")}</span>
+        </RdxPageContent>
       </RdxPageContainer>
     </RdxPageFrame>
   );
diff --git a/modules/suppliers/src/web/update/supplier-update-page.tsx b/modules/suppliers/src/web/update/supplier-update-page.tsx
index c6bab6a1..6d9a51fb 100644
--- a/modules/suppliers/src/web/update/supplier-update-page.tsx
+++ b/modules/suppliers/src/web/update/supplier-update-page.tsx
@@ -32,18 +32,20 @@ export const SupplierUpdatePage = () => {
     return (
       <RdxPageFrame>
         <RdxPageContainer width="content">
-          <PageErrorState
-            description={t("detail.error.description")}
-            primaryAction={{
-              label: t("common.actions.retry"),
-              onClick: async () => {
-                await controller.query.refetch();
-              },
-            }}
-            secondaryAction={{ label: t("common.actions.back"), onClick: navigateBack }}
-            title={t("detail.error.title")}
-            variant="notFound"
-          />
+          <RdxPageContent>
+            <PageErrorState
+              description={t("detail.error.description")}
+              primaryAction={{
+                label: t("common.actions.retry"),
+                onClick: async () => {
+                  await controller.query.refetch();
+                },
+              }}
+              secondaryAction={{ label: t("common.actions.back"), onClick: navigateBack }}
+              title={t("detail.error.title")}
+              variant="notFound"
+            />
+          </RdxPageContent>
         </RdxPageContainer>
       </RdxPageFrame>
     );
@@ -66,21 +68,17 @@ export const SupplierUpdatePage = () => {
         >
           <RdxPageContainer width="content">
             <RdxPageContent>
-              <div className="rounded-2xl border border-border/60 bg-background p-4 shadow-xs md:p-6">
-                <div className="flex min-w-0 flex-col gap-6">
-                  {controller.mutation.isError ? (
-                    <ErrorAlert
-                      message={controller.mutation.error.message || t("update.error")}
-                      title={t("update.error")}
-                    />
-                  ) : null}
-                  <SupplierEditorForm
-                    formId={controller.formId}
-                    isSubmitting={controller.mutation.isPending}
-                    onSubmit={controller.onSubmit}
-                  />
-                </div>
-              </div>
+              {controller.mutation.isError ? (
+                <ErrorAlert
+                  message={controller.mutation.error.message || t("update.error")}
+                  title={t("update.error")}
+                />
+              ) : null}
+              <SupplierEditorForm
+                formId={controller.formId}
+                isSubmitting={controller.mutation.isPending}
+                onSubmit={controller.onSubmit}
+              />
             </RdxPageContent>
           </RdxPageContainer>
         </RdxPageFrame>