Keep New Workspace on the current project (#1806)

* 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

packages/app/src/stores/last-workspace-selection.ts

@@ -3,6 +3,8 @@ export interface ActiveWorkspaceSelection {
   workspaceId: string;
 }
 
+export const LAST_WORKSPACE_SELECTION_STORAGE_KEY = "paseo:last-workspace-route-selection";
+
 export interface LastWorkspaceSelectionStorage {
   read(): Promise<string | null>;
   write(value: string): Promise<void>;