fix(projects): separate registration from workspace setup

Adding or cloning a project now registers it and opens workspace setup
instead of creating a workspace implicitly. Keep Add Project independently
mounted from Search so closing one cannot control the other.

packages/app/src/components/add-project-flow-host.tsx

@@ -0,0 +1,11 @@
+import { AddProjectFlow } from "@/components/add-project-flow";
+import { useAddProjectFlowStore } from "@/stores/add-project-flow-store";
+
+export function AddProjectFlowHost() {
+  const request = useAddProjectFlowStore((state) => state.request);
+  const close = useAddProjectFlowStore((state) => state.close);
+
+  if (!request) return null;
+
+  return <AddProjectFlow key={request.id} request={request} onClose={close} />;
+}