port aisuite#380: slack installer pre-add, mcp oauth quarantine, automation toast, e2e fixes

Slack installer joins the workspace allow-list on managed connect; MCP interactive oauth only from explicit connects.
Run-started toast over a new app-wide /ws/events socket; Automations e2e locators scoped to the account menu.

surfaces/gui/e2e/automation-toast.spec.ts

@@ -0,0 +1,44 @@
+// UX-026: the automation-start toast — top-right, 5s, schedule-fired runs only.
+// The server pushes automation_run_started over the app-wide /ws/events stream;
+// the toast names the automation, offers one View-run action (opens the run's
+// session), an ✕, and auto-dismisses via the drain bar.
+import { expect } from "@playwright/test";
+import { sendAppEvent, test } from "./fixtures";
+
+const RUN_STARTED = {
+  type: "automation_run_started",
+  data: {
+    task_id: "task-1",
+    task_title: "Daily AI News",
+    session_id: "run-live-1",
+    workspace: "/tmp/aw",
+    agent: "cowork",
+    trigger: "schedule",
+  },
+};
+
+test("a schedule-fired run pops the toast; View run opens its session", async ({ page }) => {
+  await page.goto("/");
+  await sendAppEvent(page, RUN_STARTED);
+  const toast = page.getByTestId("automation-toast");
+  await expect(toast).toContainText("Automation started");
+  await expect(toast).toContainText("Daily AI News");
+
+  await toast.getByTestId("toast-view-run").click();
+  await expect(page.getByTestId("automation-toast")).toHaveCount(0);
+  // the run's session is now the active conversation (composer visible = session surface)
+  await expect(page.getByPlaceholder(/Ask the coworker/)).toBeVisible();
+});
+
+test("the toast dismisses on ✕ and by itself after ~5s", async ({ page }) => {
+  await page.goto("/");
+  await sendAppEvent(page, RUN_STARTED);
+  await expect(page.getByTestId("automation-toast")).toBeVisible();
+  await page.getByTestId("toast-dismiss").click();
+  await expect(page.getByTestId("automation-toast")).toHaveCount(0);
+
+  await sendAppEvent(page, { ...RUN_STARTED, data: { ...RUN_STARTED.data, task_title: "Weekly CRM digest" } });
+  await expect(page.getByTestId("automation-toast")).toContainText("Weekly CRM digest");
+  // auto-dismiss: gone within the 5s drain (+ slack for CI)
+  await expect(page.getByTestId("automation-toast")).toHaveCount(0, { timeout: 7000 });
+});