Send a browser tab's window times to main with its open (dark, layout-owner build only) (#29988)

* fix(browser): keep slept workspace browser tabs off the reopen-closed list

Sleeping a workspace closed its browser tabs as if the user had closed them, so
Reopen Closed Tab could bring back a tab that was only slept. Sleep now closes
them with a 'sleep' reason that skips the reopen stack while still releasing
host pages, doc grants and webviews as before.

* feat(layout): send a browser tab's window timestamps with its open (dark)

A layout-owner build's openBrowserTab carried no createdAt, so main stamped the
tab-bar entry and the browser record with its own apply time and the window's
next save diverged on createdAt for both. The window now sends both times, as
createTerminalTab does; only switch-on builds send them.

* Revert "fix(browser): keep slept workspace browser tabs off the reopen-closed list"

This reverts commit 6798c3c701.

* test: drop the slept-tab close test that went with the held sleep fix

src/renderer/src/runtime/layout-apply-send.ts

@@ -65,6 +65,8 @@ export type WindowLayoutCommand =
       groupId?: string
       afterTabId?: string
       index?: number
+      createdAt: number
+      browserCreatedAt: number
       split?: NewGroupSplit
     }
   | { type: 'openBrowserPage' | 'closeBrowserPage'; browserTabId: string; pageId: string }

src/renderer/src/store/slices/browser-layout-owner-commands.test.ts

@@ -59,7 +59,9 @@ describe('browser tabs in a layout-owner build', () => {
           profileId: 'p1',
           sessionPartition: null,
           groupId: firstEntry.groupId,
-          index: 0
+          index: 0,
+          createdAt: firstEntry.createdAt,
+          browserCreatedAt: first.createdAt
         }
       },
       {

src/renderer/src/store/slices/browser/browser-layout-owner-commands.ts

@@ -32,6 +32,8 @@ export function recordBrowserTabOpen(state: BrowserCommandState, tab: BrowserWor
     sessionPartition: tab.sessionPartition ?? null,
     groupId: entry.groupId,
     ...(afterTabId ? { afterTabId } : position === 0 ? { index: 0 } : {}),
+    createdAt: entry.createdAt,
+    browserCreatedAt: tab.createdAt,
     // Open to the side: main makes the window's new split with the tab.
     ...newGroupSplitOf(state, tab.worktreeId, entry.groupId, entry.id)
   })

src/shared/rpc-contract/workspace-layout-params.ts

@@ -222,6 +222,8 @@ const OpenBrowserTabCommand = z.object({
   groupId: z.string().min(1).optional(),
   afterTabId: z.string().min(1).optional(),
   index: z.number().int().nonnegative().optional(),
+  createdAt: z.number().int().nonnegative().optional(),
+  browserCreatedAt: z.number().int().nonnegative().optional(),
   split: NewGroupSplit
 })
 

src/shared/workspace-layout/workspace-layout-browser-commands.test.ts

@@ -50,6 +50,15 @@ describe('openBrowserTab under the window’s ids', () => {
     expect(saved.browserTabsByWorktree?.[WS]?.at(-1)).toMatchObject({ pageIds: ['page-1'] })
   })
 
+  // Why: the window's next save carries its own timestamps; main's copy must hold the same ones.
+  it('keeps the times the window drew the entry and the record at', () => {
+    const { model } = build(testContext(), [
+      { ...WINDOW_OPEN, createdAt: 1_700_000_000_001, browserCreatedAt: 1_700_000_000_000 }
+    ])
+    expect(model.workspaces[WS]!.tabs.at(-1)?.createdAt).toBe(1_700_000_000_001)
+    expect(records(model)?.at(-1)?.createdAt).toBe(1_700_000_000_000)
+  })
+
   it('places the tab where the window drew it', () => {
     const { ctx, model, hostTab } = setup()
     const placed = build(

src/shared/workspace-layout/workspace-layout-command-types.ts

@@ -150,6 +150,9 @@ export type LayoutCommand =
       /** The window's own ids for a tab it drew: its tab-bar entry and its browser record. */
       tabId?: string
       browserTabId?: string
+      /** When the window drew the tab-bar entry and the browser record, so its later save matches. */
+      createdAt?: number
+      browserCreatedAt?: number
       split?: NewGroupSplit
     })
   | (On & { type: 'openBrowserPage'; browserTabId: string; pageId: string })

src/shared/workspace-layout/workspace-layout-content-commands.ts

@@ -134,7 +134,8 @@ export function openBrowserTab(
   const tab = contentTab(context, {
     kind: 'browser',
     id: tabId,
-    entityId: browserTabId
+    entityId: browserTabId,
+    ...(command.createdAt !== undefined ? { createdAt: command.createdAt } : {})
   })
   const next = placeContentTab(model, key, tab, command, context).model
   const workspace = next.workspaces[key]!
@@ -143,7 +144,7 @@ export function openBrowserTab(
     sessionProfileId: command.profileId ?? null,
     ...(command.sessionPartition ? { sessionPartition: command.sessionPartition } : {}),
     pageIds: [pageId],
-    createdAt: tab.createdAt
+    createdAt: command.browserCreatedAt ?? tab.createdAt
   }
   return applied(
     withWorkspace(next, key, {