feat(app): virtualize session timeline

Render SessionDetail through measured dynamic-height virtual rows while preserving disclosure state, UUID navigation, reader anchoring, and tail-follow across live updates. Add focused state/reconciliation tests plus a production Electron harness covering long-session DOM bounds, scrolling performance, offscreen navigation, and live viewport stability.
2026-07-14 03:45:39 +08:00
parent bbf16d8f9f
commit 2cad3b554d
14 changed files with 1193 additions and 816 deletions
@@ -0,0 +1,31 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+
+import { createSessionDisclosureState } from '../app/src/renderer/src/session-disclosures.mjs';
+
+test('disclosure state survives virtual row unmounts without depending on DOM nodes', () => {
+  const disclosures = createSessionDisclosureState();
+
+  disclosures.toggleOpen('tool:call-1', 'message-1');
+  disclosures.toggleRaw('tool:call-1', 'message-1');
+
+  assert.equal(disclosures.isOpen('tool:call-1'), true);
+  assert.equal(disclosures.isRaw('tool:call-1'), true);
+
+  disclosures.toggleRaw('tool:call-1', 'message-1');
+  disclosures.toggleOpen('tool:call-1', 'message-1');
+
+  assert.equal(disclosures.isOpen('tool:call-1'), false);
+  assert.equal(disclosures.isRaw('tool:call-1'), false);
+});
+
+test('disclosure state forgets entries owned by removed messages', () => {
+  const disclosures = createSessionDisclosureState();
+  disclosures.toggleOpen('tool:call-1', 'message-1');
+  disclosures.toggleOpen('tool:call-2', 'message-2');
+
+  disclosures.retainMessages(new Set(['message-2']));
+
+  assert.equal(disclosures.isOpen('tool:call-1'), false);
+  assert.equal(disclosures.isOpen('tool:call-2'), true);
+});