test(web): adapt workspace browser e2e interactions to the compact sidebar

The sidebar redesign removed group session counts, collapsed search into a
header action, and moved grouping into the View options menu. Update the
browser scenarios that waited on the old surfaces:

- Wait on the Ungrouped bucket row instead of the removed session-count text.
- Expand the collapsed search control before filling the renamed input.
- Open the View options menu instead of the removed Group by button.
- Assert the persisted grouping under the new dsh.workspace.view.v4 key.
- built-boot: assert the fixture workspace group row instead of its count.

apps/web/tests/pwsh-terminal.e2e.ts

@@ -68,8 +68,11 @@ describe.skipIf(MODE === 'record' || !HAS_PWSH)('web e2e: pwsh calls use the bas
     onTestFailed(() => saveFailureShot(page, 'web-e2e-pwsh-terminal'))
     // Open the seeded session through content search: the sidebar groups
     // sessions by workspace and its row order is world-dependent, while the
-    // search index covers the seeded log deterministically.
-    const search = page.getByPlaceholder('Search name, keywords', { exact: false })
+    // search index covers the seeded log deterministically. Search is a
+    // collapsed header action; expand it so the input is actionable.
+    const searchButton = page.getByRole('button', { name: 'Search sessions' })
+    if (await searchButton.getAttribute('aria-expanded') !== 'true') await searchButton.click()
+    const search = page.getByPlaceholder('Search sessions', { exact: false })
     await search.fill('Run a PowerShell command')
     const result = page.getByRole('tree', { name: 'Search results' }).getByRole('treeitem')
     await expect.poll(() => result.count(), { timeout: 15_000 }).toBe(1)