* fix(web): align office topbar border with sidebar header (h-10)
The OfficeTopbar was h-12 (48px) while the AppSidebar header is h-10 (40px),
so the office top bar's bottom border sat ~8px below the sidebar's
under-workspace-picker border, breaking the continuous seam where the sidebar
meets the page content. Drop the topbar to h-10 to match the sidebar header and
the PageTopbar/dockview top bars used elsewhere.
Add data-testid hooks to both bordered sections and a Playwright regression
asserting they resolve to the same height and bottom y-position.
* test(web): force expanded sidebar in topbar alignment check
Addresses review feedback (Greptile/Claude): the alignment assertion only
holds for the expanded sidebar header (its border sits under the workspace
picker, and that layout carries data-testid="app-sidebar-header"). Set the
appSidebar.collapsed flag off via addInitScript before load so leftover
collapsed state can't turn the check into a confusing timeout instead of a
real assertion.
José Almeida
dd4cb2c3ee