feat: publish shared task and reply activities through MCP

e2e/models/ready.ts

@@ -0,0 +1,18 @@
+import type { Page } from "@playwright/test";
+
+/** Register before navigation: this stream starts in a client effect after hydration. */
+export function waitForWorkspaceHydration(page: Page) {
+  return page.waitForResponse((response) => {
+    if (response.status() !== 200) return false;
+    const path = new URL(response.url()).pathname;
+    return (
+      path === "/api/activities/events" ||
+      (response.request().isNavigationRequest() &&
+        ["/login", "/setup", "/onboarding"].includes(path))
+    );
+  });
+}
+
+export async function navigateHydrated(page: Page, url: string) {
+  await Promise.all([waitForWorkspaceHydration(page), page.goto(url)]);
+}