Measure refresh latency independently and retain intended result selection

apps/desktop/tests/search-performance.test.mjs

@@ -100,3 +100,64 @@ test('an in-flight attempt keeps its captured submission when a refresh queues',
   assert.equal(attempts[1].retry_wait_ms, 0);
   assert.notEqual(attempts[0].submission, attempts[1].submission);
 });
+
+test('filesystem refresh excludes long idle time and retains original input timings separately', () => {
+  const original = new SearchMeasurement(100, 160, true, { device: 'cpu' });
+  original.submitted('lexical', 160);
+  finish(original, 'lexical', 165, 177, native, false);
+  original.displayed('lexical', 177, 180, 2);
+  original.submitted('hybrid', 510);
+  finish(original, 'hybrid', 510, 522, native, false);
+  original.displayed('hybrid', 522, 524, 3);
+  const before = original.export();
+  const refreshed = original.freshForRefresh(83500);
+  refreshed.submitted('lexical', 83500);
+  finish(refreshed, 'lexical', 83502, 83514, native, false);
+  refreshed.displayed('lexical', 83514, 83515, 3);
+  const report = refreshed.export();
+  assert.equal(report.trigger, 'filesystem_refresh');
+  assert.equal(report.first_results_ms, 15);
+  assert.equal(report.latest_displayed_ms, 15);
+  assert.equal(report.debounce_ms, 0);
+  assert.equal(report.hybrid_final_results_ms, null);
+  assert.deepEqual(report.original_input, {
+    debounce_ms: 60, first_results_ms: 80, latest_displayed_ms: 424,
+    hybrid_final_results_ms: 424,
+  });
+  assert.equal(report.attempts.length, 1);
+  assert.equal(report.attempts[0].attempt, 1);
+  assert.equal(report.attempts[0].queued_ms, 2);
+  assert.deepEqual(original.export(), before);
+});
+
+test('repeated refreshes retain a bounded immutable numeric origin without replaying failures or private spans', () => {
+  const original = new SearchMeasurement(0, 60, false);
+  original.submitted('lexical', 60);
+  finish(original, 'lexical', 60, 70, {
+    ...native, trace: [{ name: 'private-path-and-snippet', start_ms: 0, duration_ms: 1, parent: null, counters: {} }],
+  }, true);
+  original.displayed('lexical', 70, 72, 1);
+  let refreshed = original.freshForRefresh(10000);
+  const origin = refreshed.export().original_input;
+  original.displayed('hybrid', 10001, 10002, 5);
+  for (let i = 0; i < 100; i++) {
+    const now = 20000 + i * 10000;
+    refreshed = refreshed.freshForRefresh(now);
+    assert.equal(refreshed.export().attempts.length, 0);
+    assert.equal(refreshed.export().displays.length, 0);
+    refreshed.submitted('lexical', now);
+    finish(refreshed, 'lexical', now + 2, now + 14, native, false);
+    refreshed.displayed('lexical', now + 14, now + 15, 2);
+    const report = refreshed.export();
+    assert.equal(report.latest_displayed_ms, 15);
+    assert.equal(report.attempts[0].retry_wait_ms, 0);
+    assert.equal(report.attempts[0].attempt, 1);
+    assert.deepEqual(report.original_input, origin);
+    report.original_input.first_results_ms = 999;
+    assert.deepEqual(refreshed.export().original_input, origin);
+    assert.doesNotMatch(JSON.stringify(report), /private-path-and-snippet|ended_at/);
+    assert.ok(JSON.stringify(report).length < 1500);
+  }
+  assert.equal(origin.first_results_ms, 72);
+  assert.equal(origin.hybrid_final_results_ms, null);
+});