Rename Foundry handoffs to tasks (#239)

* Restore foundry onboarding stack

* Consolidate foundry rename

* Create foundry tasks without prompts

* Rename Foundry handoffs to tasks

foundry/packages/frontend/src/lib/mock-app.ts

@@ -0,0 +1,68 @@
+import { useSyncExternalStore } from "react";
+import {
+  createFoundryAppClient,
+  currentFoundryOrganization,
+  currentFoundryUser,
+  eligibleFoundryOrganizations,
+  type FoundryAppClient,
+} from "@sandbox-agent/foundry-client";
+import type { FoundryAppSnapshot, FoundryOrganization } from "@sandbox-agent/foundry-shared";
+import { backendClient } from "./backend";
+import { frontendClientMode } from "./env";
+
+const REMOTE_APP_SESSION_STORAGE_KEY = "sandbox-agent-foundry:remote-app-session";
+
+const appClient: FoundryAppClient = createFoundryAppClient({
+  mode: frontendClientMode,
+  backend: frontendClientMode === "remote" ? backendClient : undefined,
+});
+
+export function useMockAppSnapshot(): FoundryAppSnapshot {
+  return useSyncExternalStore(appClient.subscribe.bind(appClient), appClient.getSnapshot.bind(appClient), appClient.getSnapshot.bind(appClient));
+}
+
+export function useMockAppClient(): FoundryAppClient {
+  return appClient;
+}
+
+export const activeMockUser = currentFoundryUser;
+export const activeMockOrganization = currentFoundryOrganization;
+export const eligibleOrganizations = eligibleFoundryOrganizations;
+
+// Track whether the remote client has delivered its first real snapshot.
+// Before the first fetch completes the snapshot is the default empty signed_out state,
+// so we show a loading screen.  Once the fetch returns we know the truth.
+let firstSnapshotDelivered = false;
+
+// The remote client notifies listeners after refresh(), which sets `firstSnapshotDelivered`.
+const origSubscribe = appClient.subscribe.bind(appClient);
+appClient.subscribe = (listener: () => void): (() => void) => {
+  const wrappedListener = () => {
+    firstSnapshotDelivered = true;
+    listener();
+  };
+  return origSubscribe(wrappedListener);
+};
+
+export function isAppSnapshotBootstrapping(snapshot: FoundryAppSnapshot): boolean {
+  if (frontendClientMode !== "remote" || typeof window === "undefined") {
+    return false;
+  }
+
+  const hasStoredSession = window.localStorage.getItem(REMOTE_APP_SESSION_STORAGE_KEY)?.trim().length;
+  if (!hasStoredSession) {
+    return false;
+  }
+
+  // If the backend has already responded and we're still signed_out, the session is stale.
+  if (firstSnapshotDelivered) {
+    return false;
+  }
+
+  // Still waiting for the initial fetch — show the loading screen.
+  return snapshot.auth.status === "signed_out" && snapshot.users.length === 0 && snapshot.organizations.length === 0;
+}
+
+export function getMockOrganizationById(snapshot: FoundryAppSnapshot, organizationId: string): FoundryOrganization | null {
+  return snapshot.organizations.find((organization) => organization.id === organizationId) ?? null;
+}