diff --git a/packages/app-elements/src/helpers/useAppLinking.ts b/packages/app-elements/src/helpers/useAppLinking.ts
index 35283a336..ec7fb3318 100644
--- a/packages/app-elements/src/helpers/useAppLinking.ts
+++ b/packages/app-elements/src/helpers/useAppLinking.ts
@@ -1,5 +1,5 @@
 import isEmpty from "lodash-es/isEmpty"
-import { useCallback } from "react"
+import { useCallback, useRef } from "react"
 import { useLocation, useRouter, useSearch } from "wouter"
 import { useTokenProvider } from "#providers/TokenProvider"
 import type { TokenProviderClAppSlug } from "#providers/TokenProvider/types"
@@ -51,6 +51,19 @@ export function useAppLinking(): UseAppLinkingHook {
   const [location, setLocation] = useLocation()
   const search = useSearch()
 
+  /**
+   * `navigateTo` keeps a stable identity on purpose: it is called while rendering
+   * list rows, so re-creating it on every navigation would invalidate memoized
+   * rows and re-run any consumer effect that depends on it.
+   *
+   * That means it must not close over `location`/`search`, which change on every
+   * navigation — the entry saved for "go back" has to be the url at *click* time,
+   * not the one from the render that last recreated this callback. Reading them
+   * from a ref keeps both properties.
+   */
+  const currentUrlRef = useRef({ location, search })
+  currentUrlRef.current = { location, search }
+
   const navigateTo: UseAppLinkingHook["navigateTo"] = useCallback(
     ({ app, resourceId }) => {
       const path = resourceId != null ? `/list/${resourceId}` : `/list`
@@ -77,11 +90,12 @@ export function useAppLinking(): UseAppLinkingHook {
           // probably in a future we can use a query string param
           window.location.assign(to)
         } else {
+          const { location: from, search: fromSearch } = currentUrlRef.current
           saveGoBackItem({
             destinationApp: app,
             resourceId,
             returnToApp: currentAppSlug as TokenProviderClAppSlug,
-            location: `${location}${!isEmpty(search) ? `?${search}` : ""}`,
+            location: `${from}${!isEmpty(fromSearch) ? `?${fromSearch}` : ""}`,
           })
           setLocation(to)
         }
diff --git a/packages/app-elements/src/ui/atoms/Stack.tsx b/packages/app-elements/src/ui/atoms/Stack.tsx
index bb1f79975..3990396e0 100644
--- a/packages/app-elements/src/ui/atoms/Stack.tsx
+++ b/packages/app-elements/src/ui/atoms/Stack.tsx
@@ -6,7 +6,7 @@ export interface StackProps {
 
 function renderChild(child: ReactNode): JSX.Element {
   return (
-    <div className="flex-1 flex flex-col items-start py-6 md:py-2 md:px-6 border-t md:border-l border-l-0 md:border-t-0 border-gray-100 first:border-l-0 first:border-t-0 md:first:-ml-6 md:last:-mr-6 print:border-t-0">
+    <div className="flex-1 flex flex-col items-start py-6 @xl:py-2 @xl:px-6 border-t @xl:border-l border-l-0 @xl:border-t-0 border-gray-100 first:border-l-0 first:border-t-0 @xl:first:-ml-6 @xl:last:-mr-6 print:border-t-0">
       {child}
     </div>
   )
@@ -16,9 +16,14 @@ function Stack({ children, ...props }: StackProps): JSX.Element {
   return (
     <div
       {...props}
-      className="border-t border-b border-gray-100 md:py-6 not-first:-mt-px" // make multiple stack possible even across different siblings
+      // `@container` + `@xl` variants lay the children out side by side based on
+      // the width available to the Stack rather than the viewport width, so it
+      // stays readable inside narrow containers such as a page sidebar.
+      // The 576px threshold sits below the 632px default content width, so a
+      // regular page keeps the horizontal layout it has always had.
+      className="@container border-t border-b border-gray-100 @xl:py-6 not-first:-mt-px" // make multiple stack possible even across different siblings
     >
-      <div className="flex flex-col md:flex-row print:flex-row print:gap-4">
+      <div className="flex flex-col @xl:flex-row print:flex-row print:gap-4">
         {Children.map(children, (child) => child != null && renderChild(child))}
       </div>
     </div>
diff --git a/packages/app-elements/src/ui/composite/PageLayout.tsx b/packages/app-elements/src/ui/composite/PageLayout.tsx
index 570e8c7e3..3ac8a4b97 100644
--- a/packages/app-elements/src/ui/composite/PageLayout.tsx
+++ b/packages/app-elements/src/ui/composite/PageLayout.tsx
@@ -1,3 +1,4 @@
+import cn from "classnames"
 import type { ReactNode } from "react"
 import { useTokenProvider } from "#providers/TokenProvider"
 import type { ContainerProps } from "#ui/atoms/Container"
@@ -17,6 +18,51 @@ export type PageLayoutProps = Pick<
      * Page content
      */
     children: ReactNode
+    /**
+     * Secondary content, rendered in a column beside `children` on large screens
+     * and stacked below it on smaller ones.
+     *
+     * Meant for details pages, where the supporting information of a resource
+     * (customer, addresses, tags, metadata, …) sits next to its main content.
+     * Only the structure is provided: wrap the content in a `Card` with a
+     * `Section` per block to get the look used by the dashboard.
+     *
+     * Best paired with `fullWidth`, since the default content width leaves too
+     * little room for two columns.
+     *
+     * @example
+     * ```jsx
+     * <PageLayout
+     *   title='Order #1234'
+     *   fullWidth
+     *   sidebar={
+     *     <Card>
+     *       <Section title='Customer'>...</Section>
+     *       <Section title='Addresses'>...</Section>
+     *     </Card>
+     *   }
+     * >
+     *   <OrderSummary />
+     * </PageLayout>
+     * ```
+     */
+    sidebar?: ReactNode
+    /**
+     * Tail of the main content, rendered below `children` on large screens and
+     * below the `sidebar` once the layout collapses to a single column.
+     *
+     * Use it for sections that should stay last no matter the width, such as a
+     * timeline: `children` and `sidebar` alone would push the sidebar to the very
+     * bottom of the page when stacked.
+     *
+     * @example
+     * ```jsx
+     * <PageLayout sidebar={<Card>…</Card>} afterSidebar={<Timeline />}>
+     *   <OrderSummary />
+     * </PageLayout>
+     * ```
+     */
+    afterSidebar?: ReactNode
     /**
      * When mode is `test`, it will render a `TEST DATA` Badge to inform user api is working in test mode.
      * Only if app is standalone mode.
@@ -48,6 +94,8 @@ export const PageLayout = withSkeletonTemplate<PageLayoutProps>(
     description,
     navigationButton,
     children,
+    sidebar,
+    afterSidebar,
     toolbar,
     mode,
     gap,
@@ -66,6 +114,11 @@ export const PageLayout = withSkeletonTemplate<PageLayoutProps>(
     const { overlayFooter, ...rest } =
       "overlayFooter" in props ? props : { ...props, overlayFooter: undefined }
 
+    // `false` is what a `condition && <Section />` prop evaluates to, which is
+    // common while a resource is still loading: treat it as no content, so no
+    // empty grid row is created.
+    const hasAfterSidebar = afterSidebar != null && afterSidebar !== false
+
     const component = (
       <>
         <PageHeading
@@ -85,7 +138,36 @@ export const PageLayout = withSkeletonTemplate<PageLayoutProps>(
           isLoading={isLoading}
           delayMs={delayMs}
         />
-        {children}
+        {sidebar == null ? (
+          <>
+            {children}
+            {afterSidebar}
+          </>
+        ) : (
+          // A grid rather than two flex columns, so that `afterSidebar` can be
+          // placed under `children` on the left while the sidebar keeps its own
+          // column: stacked, the natural source order then reads
+          // children → sidebar → afterSidebar.
+          // `min-w-0` stops wide content (tables, code blocks) in the main column
+          // from pushing the sidebar out of the viewport.
+          <div className="grid lg:grid-cols-[minmax(0,1fr)_380px] lg:gap-x-8 print:block">
+            <div className="min-w-0 lg:col-start-1 lg:row-start-1">
+              {children}
+            </div>
+            <aside
+              className={cn("self-start lg:col-start-2 lg:row-start-1", {
+                "lg:row-span-2": hasAfterSidebar,
+              })}
+            >
+              {sidebar}
+            </aside>
+            {hasAfterSidebar && (
+              <div className="min-w-0 lg:col-start-1 lg:row-start-2">
+                {afterSidebar}
+              </div>
+            )}
+          </div>
+        )}
         {scrollToTop === true && <ScrollToTop />}
       </>
     )