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/hooks/use-global-new-workspace-action.ts

@@ -2,8 +2,11 @@ import { useCallback } from "react";
 import { router } from "expo-router";
 import { useKeyboardActionHandler } from "@/hooks/use-keyboard-action-handler";
 import type { KeyboardActionId } from "@/keyboard/keyboard-action-dispatcher";
+import { canCreateWorktreeForProjectKind } from "@/projects/host-projects";
+import { useHostFeature } from "@/runtime/host-features";
 import { useHosts } from "@/runtime/host-runtime";
 import { useActiveWorkspaceSelection } from "@/stores/navigation-active-workspace-store";
+import { useWorkspace } from "@/stores/session-store-hooks";
 import { buildNewWorkspaceRoute } from "@/utils/host-routes";
 
 const WORKSPACE_NEW_ACTIONS: readonly KeyboardActionId[] = ["workspace.new"];
@@ -11,15 +14,34 @@ const WORKSPACE_NEW_ACTIONS: readonly KeyboardActionId[] = ["workspace.new"];
 export function useGlobalNewWorkspaceAction() {
   const selection = useActiveWorkspaceSelection();
   const serverId = selection?.serverId ?? null;
+  const workspaceId = selection?.workspaceId ?? null;
   const hosts = useHosts();
+  const activeWorkspace = useWorkspace(serverId, workspaceId);
+  const supportsWorkspaceMultiplicity = useHostFeature(serverId, "workspaceMultiplicity");
+  const canUseActiveWorkspaceContext = Boolean(
+    activeWorkspace &&
+    (supportsWorkspaceMultiplicity || canCreateWorktreeForProjectKind(activeWorkspace.projectKind)),
+  );
 
   const handle = useCallback(() => {
     if (hosts.length === 0) {
       return false;
     }
-    router.navigate(buildNewWorkspaceRoute(serverId ? { serverId } : undefined) as never);
+    router.navigate(
+      (serverId
+        ? buildNewWorkspaceRoute(
+            activeWorkspace && canUseActiveWorkspaceContext
+              ? {
+                  serverId,
+                  sourceDirectory: activeWorkspace.projectRootPath,
+                  projectId: activeWorkspace.projectId,
+                }
+              : { serverId },
+          )
+        : buildNewWorkspaceRoute()) as never,
+    );
     return true;
-  }, [hosts.length, serverId]);
+  }, [activeWorkspace, canUseActiveWorkspaceContext, hosts.length, serverId]);
 
   useKeyboardActionHandler({
     handlerId: "workspace-new-global",