fix(frontend): preserve cancellation and reject invalid query data (#6143)

* fix(frontend): preserve request cancellation and schema failures

* fix(frontend): limit schema failures to query boundaries

* fix(frontend): keep invalid settings recoverable

Keep settings payload validation tolerant so values accepted by the backend remain editable, while paged clients still fail closed. Add an AbortSignal.any fallback and make timeout tests event-driven.

---------

Co-authored-by: PathGao <gaoyanbo@gaoyanbodeMacBook-Air.local>

frontend/src/test/use-all-settings.test.tsx

@@ -0,0 +1,28 @@
+import type { ReactNode } from 'react';
+import { renderHook, waitFor } from '@testing-library/react';
+import { QueryClientProvider } from '@tanstack/react-query';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { useAllSettings } from '@/api/queries/useAllSettings';
+import { makeTestQueryClient } from '@/test/test-utils';
+import { HttpUtil, Msg } from '@/utils';
+
+afterEach(() => {
+  vi.restoreAllMocks();
+});
+
+describe('useAllSettings', () => {
+  it('keeps backend-accepted settings editable when the frontend schema is stricter', async () => {
+    const subJsonUserAgentRegex = 'x'.repeat(2_049);
+    vi.spyOn(HttpUtil, 'post').mockResolvedValue(new Msg(true, '', { subJsonUserAgentRegex }));
+    const queryClient = makeTestQueryClient();
+    const wrapper = ({ children }: { children: ReactNode }) => (
+      <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+    );
+
+    const { result } = renderHook(() => useAllSettings(), { wrapper });
+
+    await waitFor(() => expect(result.current.fetched).toBe(true));
+    expect(result.current.allSetting.subJsonUserAgentRegex).toBe(subJsonUserAgentRegex);
+  });
+});