* fix(app): keep New Workspace on the active project
New Workspace preselection was falling back to stale remembered host state when multiple hosts existed. Pass durable active-project context from workspace entry points and centralize initial host selection so stale offline hosts cannot steal the form while startup restore remains last-workspace only.
* fix(app): address New Workspace review feedback
* fix(app): stabilize New Workspace host selection
* fix(app): preserve New Workspace host fallback
* test(app): loosen stale-host project assertion
* fix(app): prefer reachable new workspace hosts
* fix(app): avoid stale offline workspace preselect
* fix(app): prefer online project hosts
* fix(app): make new workspace global
New Workspace now opens as an app-wide screen. Host and project context can still preselect the form through query params, but the route itself no longer lives under a host.
* fix(app): simplify new workspace selection
Cmd+N (Ctrl+N off mac) navigates to the new-workspace route through a
global handler keyed on the active host. The sidebar header row surfaces
the shortcut hint on hover, replacing the redundant "+" button that
duplicated the action in the Workspaces section header.
