fix(app): unmount hidden session panes (#35628)

packages/app/e2e/regression/review-terminal-stacked.spec.ts

@@ -168,8 +168,8 @@ test("keeps the review tree and terminal sized when both panels are open", async
   await expectTree(page, 2_773, "action.yml")
 
   await page.getByRole("button", { name: "Toggle file tree" }).click()
-  await expect(page.locator('[data-slot="session-review-v2-sidebar"]')).toHaveAttribute("aria-hidden", "true")
-  await expect(page.locator('#review-panel [data-component="file-tree-v2"]')).toHaveCount(1)
+  await expect(page.locator('[data-slot="session-review-v2-sidebar"]')).toHaveCount(0)
+  await expect(page.locator('#review-panel [data-component="file-tree-v2"]')).toHaveCount(0)
   await page.getByRole("button", { name: "Toggle file tree" }).click()
   await expectTree(page, 2_773, "action.yml")
 
@@ -181,8 +181,7 @@ test("keeps the review tree and terminal sized when both panels are open", async
   await expectTree(page, 2_773, "action.yml")
 
   await page.getByRole("button", { name: "Toggle review" }).click()
-  await expect(page.locator("#review-panel")).toHaveAttribute("aria-hidden", "true")
-  await expect(page.locator('#review-panel [data-component="file-tree-v2"]')).toHaveCount(1)
+  await expect(page.locator("#review-panel")).toHaveCount(0)
   await page.getByRole("button", { name: "Toggle review" }).click()
   await expectTree(page, 2_773, "action.yml")
   await page.setViewportSize({ width: 1_000, height: 700 })

packages/app/src/pages/session.tsx

@@ -2198,7 +2198,7 @@ export default function Page() {
           </Show>
         </div>
 
-        <Show when={!newSessionDesign()}>
+        <Show when={!newSessionDesign() && desktopSidePanelOpen()}>
           <SessionSidePanel
             canReview={canReview}
             diffs={reviewDiffs}
@@ -2217,13 +2217,8 @@ export default function Page() {
         <Show when={newSessionDesign()}>
           <Show when={isDesktop() ? desktopV2PanelLayout().visible : terminalOpen()}>
             <div class="min-w-0 h-full flex flex-1 flex-col">
-              <Show when={isDesktop()}>
-                <div
-                  classList={{
-                    "min-h-0 flex-1": desktopV2ReviewOpen() || desktopFileTreeOpen(),
-                    "size-0 shrink-0 overflow-hidden": !(desktopV2ReviewOpen() || desktopFileTreeOpen()),
-                  }}
-                >
+              <Show when={isDesktop() && (desktopV2ReviewOpen() || desktopFileTreeOpen())}>
+                <div class="min-h-0 flex-1">
                   <SessionSidePanel
                     canReview={canReview}
                     diffs={reviewDiffs}

packages/app/src/pages/session/session-side-panel.tsx

@@ -81,7 +81,6 @@ export function SessionSidePanel(props: {
       }),
   )
   const open = createMemo(() => reviewOpen() || fileOpen())
-  const rendered = createMemo<boolean>((previous) => previous || open(), false)
   const reviewTab = createMemo(() => isDesktop())
   const panelWidth = createMemo(() => {
     if (!open()) return "0px"
@@ -164,10 +163,6 @@ export function SessionSidePanel(props: {
   const openedTabs = tabState.openedTabs
   const activeTab = tabState.activeTab
   const activeFileTab = tabState.activeFileTab
-  const reviewContentRendered = createMemo<boolean>(
-    (previous) => previous || (reviewOpen() && activeTab() === "review"),
-    false,
-  )
 
   const fileTreeTab = () => layout.fileTree.tab()
 
@@ -272,21 +267,15 @@ export function SessionSidePanel(props: {
         }}
         style={{ width: panelWidth() }}
       >
-        <Show when={rendered()}>
+        <Show when={open()}>
           <div
             class="size-full flex"
             classList={{
               "border-l border-border-weaker-base": !settings.general.newLayoutDesigns(),
             }}
           >
-            <div
-              aria-hidden={!reviewOpen()}
-              inert={!reviewOpen()}
-              class="relative min-w-0 h-full flex-1 overflow-hidden bg-background-base"
-              classList={{
-                "pointer-events-none": !reviewOpen(),
-              }}
-            >
+            <Show when={reviewOpen()}>
+              <div class="relative min-w-0 h-full flex-1 overflow-hidden bg-background-base">
                 <div class="size-full min-w-0 h-full bg-background-base">
                   <DragDropProvider
                     onDragStart={handleDragStart}
@@ -417,24 +406,21 @@ export function SessionSidePanel(props: {
                         </Tabs.List>
                       </div>
 
-                    <Show when={reviewTab() && props.canReview() && reviewContentRendered()}>
+                      <Show when={reviewTab() && props.canReview() && activeTab() === "review"}>
                         <div
                           id={reviewTabPanelID}
                           role="tabpanel"
                           aria-labelledby={reviewTabID}
-                        aria-hidden={activeTab() !== "review"}
-                        inert={activeTab() !== "review"}
                           tabIndex={props.reviewHasFocusableContent() ? undefined : 0}
                           data-slot="tabs-content"
                           class="flex flex-col h-full overflow-hidden contain-strict"
-                        classList={{ hidden: activeTab() !== "review" }}
                         >
                           {props.reviewPanel()}
                         </div>
                       </Show>
 
-                    <Tabs.Content value="empty" class="flex flex-col h-full overflow-hidden contain-strict">
                       <Show when={activeTab() === "empty"}>
+                        <Tabs.Content value="empty" class="flex flex-col h-full overflow-hidden contain-strict">
                           <div class="relative pt-2 flex-1 min-h-0 overflow-hidden">
                             <div class="h-full px-6 pb-42 -mt-4 flex flex-col items-center justify-center text-center gap-6">
                               <Mark class="w-14 opacity-10" />
@@ -443,16 +429,14 @@ export function SessionSidePanel(props: {
                               </div>
                             </div>
                           </div>
-                      </Show>
                         </Tabs.Content>
+                      </Show>
 
-                    <Show when={contextOpen()}>
-                      <Tabs.Content value="context" class="flex flex-col h-full overflow-hidden contain-strict">
                       <Show when={activeTab() === "context"}>
+                        <Tabs.Content value="context" class="flex flex-col h-full overflow-hidden contain-strict">
                           <div class="relative pt-2 flex-1 min-h-0 overflow-hidden">
                             <SessionContextTab />
                           </div>
-                        </Show>
                         </Tabs.Content>
                       </Show>
 
@@ -490,15 +474,13 @@ export function SessionSidePanel(props: {
                   </DragDropProvider>
                 </div>
               </div>
+            </Show>
 
-            <Show when={shown()}>
+            <Show when={fileOpen()}>
               <div
                 id="file-tree-panel"
-                aria-hidden={!fileOpen()}
-                inert={!fileOpen()}
                 class="relative min-w-0 h-full shrink-0 overflow-hidden"
                 classList={{
-                  "pointer-events-none": !fileOpen(),
                   "transition-[width] duration-200 ease-[cubic-bezier(0.22,1,0.36,1)] will-change-[width] motion-reduce:transition-none":
                     !props.size.active(),
                 }}
@@ -526,6 +508,7 @@ export function SessionSidePanel(props: {
                         {language.t("session.files.all")}
                       </Tabs.Trigger>
                     </Tabs.List>
+                    <Show when={fileTreeTab() === "changes"}>
                       <Tabs.Content value="changes" class="bg-background-stronger px-3 py-0">
                         <Switch>
                           <Match when={props.hasReview() || !props.diffsReady()}>
@@ -551,6 +534,8 @@ export function SessionSidePanel(props: {
                           </Match>
                         </Switch>
                       </Tabs.Content>
+                    </Show>
+                    <Show when={fileTreeTab() === "all"}>
                       <Tabs.Content value="all" class="bg-background-stronger px-3 py-0">
                         <Switch>
                           <Match when={nofiles()}>{empty(language.t("session.files.empty"))}</Match>
@@ -565,6 +550,7 @@ export function SessionSidePanel(props: {
                           </Match>
                         </Switch>
                       </Tabs.Content>
+                    </Show>
                   </Tabs>
                 </div>
                 <Show when={fileOpen()}>

packages/session-ui/src/v2/components/session-review-v2.tsx

@@ -74,12 +74,11 @@ export function SessionReviewV2Sidebar(props: SessionReviewV2SidebarProps) {
 
   return (
     <div data-component="session-review-v2-sidebar-root">
+      <Show when={props.open}>
         <aside
           data-slot="session-review-v2-sidebar"
           data-resizing={resizing() ? "" : undefined}
-        aria-hidden={!props.open}
-        inert={!props.open}
-        style={{ width: props.open ? `${width()}px` : "0px" }}
+          style={{ width: `${width()}px` }}
         >
           <div data-slot="session-review-v2-sidebar-header">
             <div data-slot="session-review-v2-sidebar-title">{props.title}</div>
@@ -130,6 +129,7 @@ export function SessionReviewV2Sidebar(props: SessionReviewV2SidebarProps) {
             {props.children}
           </ScrollView>
         </aside>
+      </Show>
       <Show when={props.open && props.onWidthChange}>
         <div data-slot="session-review-v2-sidebar-resize" onPointerDown={() => setResizing(true)}>
           <ResizeHandle