Previous commit only guarded SortableWorkspace. LocalWorkspace (rendered from layout.tsx:2243 with the same project={project()!} pattern) still accessed props.project.worktree directly inside four createMemo / useQuery bodies and threw the same 'worktree of undefined' during a server swap cascade. Route every worktree read through a worktree memo that returns the string or '', and guard the projectId prop on WorkspaceHeader.
LukeParkerDev
0e7e791008