test: strengthen user-path coverage and CI gates (#5308)

webui/src/tests/settings-view.test.tsx

@@ -1,4 +1,4 @@
-import { act, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
+import { act, cleanup, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
@@ -399,9 +399,14 @@ describe("SettingsView Apps catalog", () => {
         dispatchEvent: vi.fn(),
       })),
     );
+    vi.stubGlobal(
+      "fetch",
+      vi.fn(() => new Promise<Response>(() => {})),
+    );
   });
 
   afterEach(() => {
+    cleanup();
     localStorage.removeItem("nanobot-webui.settings-preferences");
     vi.useRealTimers();
     vi.unstubAllGlobals();