Harden traffic history worker lifecycle and query performance

test/web/api-errors.test.js

@@ -143,8 +143,12 @@ test('typed endpoint facade preserves exact request contracts and raw payload id
       assert.equal(await invoke(), payload);
       const [actualUrl, actualOptions] = calls.at(-1);
       assert.equal(actualUrl, url);
-      assert.deepEqual(actualOptions, {
-        ...options,
+      assert.ok(actualOptions.signal instanceof AbortSignal);
+      assert.equal(actualOptions.signal.aborted, false);
+      const { signal: requestedSignal, ...requestOptions } = options;
+      const { signal: actualSignal, ...fetchOptions } = actualOptions;
+      assert.deepEqual(fetchOptions, {
+        ...requestOptions,
         headers: { 'content-type': 'application/json' },
       });
     }
@@ -162,7 +166,9 @@ test('request preserves caller headers, AbortError identity and JSON fallbacks',
     received = [url, options];
     return { ok: true, status: 200, json: async () => value };
   }), value);
-  assert.deepEqual(received, ['/api/test', {
+  assert.ok(received[1].signal instanceof AbortSignal);
+  const { signal, ...options } = received[1];
+  assert.deepEqual([received[0], options], ['/api/test', {
     headers: { 'content-type': 'application/custom', 'x-harbor': 'yes' },
   }]);
 
@@ -188,3 +194,40 @@ test('request preserves caller headers, AbortError identity and JSON fallbacks',
     (error) => error.code === 'CONTROL_UNREACHABLE' && error.status === 503,
   );
 });
+
+test('API deadlines cover headers and response bodies, while caller cancellation keeps its reason', async (t) => {
+  t.mock.timers.enable({ apis: ['setTimeout'] });
+  const stalled = (signal) => new Promise((resolve, reject) => {
+    signal.addEventListener('abort', () => reject(signal.reason), { once: true });
+  });
+  for (const phase of ['headers', 'body']) {
+    let signal;
+    const pending = request('/api/state', {}, async (url, options) => {
+      signal = options.signal;
+      return phase === 'headers' ? stalled(signal)
+        : { ok: true, status: 200, json: () => stalled(signal) };
+    });
+    const checked = assert.rejects(pending, (error) => error.code === 'CONTROL_UNREACHABLE' && error.retryable);
+    await Promise.resolve();
+    t.mock.timers.tick(14_999);
+    assert.equal(signal.aborted, false);
+    t.mock.timers.tick(1);
+    await checked;
+  }
+  const caller = new AbortController();
+  const reason = new DOMException('left the page', 'AbortError');
+  const pending = request('/api/test', { signal: caller.signal }, (url, options) => stalled(options.signal));
+  const checked = assert.rejects(pending, (error) => error === reason);
+  caller.abort(reason);
+  await checked;
+  let commandSignal;
+  const command = request('/api/diagnostics/dns', { method: 'POST' }, (url, options) => {
+    commandSignal = options.signal;
+    return stalled(commandSignal);
+  });
+  const commandChecked = assert.rejects(command, (error) => error.code === 'CONTROL_UNREACHABLE');
+  t.mock.timers.tick(59_999);
+  assert.equal(commandSignal.aborted, false);
+  t.mock.timers.tick(1);
+  await commandChecked;
+});