Make rewind E2E use real scroll intent

packages/app/e2e/rewind-menu.ui-contract.spec.ts

@@ -2,6 +2,7 @@ import type { Locator } from "@playwright/test";
 import { expect, test, type Page } from "./fixtures";
 import { openAgentRoute, seedMockAgentWorkspace } from "./helpers/mock-agent";
 import { installDaemonWebSocketGate } from "./helpers/daemon-websocket-gate";
+import { scrollChatAwayFromBottom } from "./helpers/agent-bottom-anchor";
 import {
   composerLocator,
   expectComposerDraft,
@@ -191,6 +192,10 @@ test.describe("Rewind sheet", () => {
       await expect(page.getByText("Cycle 1", { exact: true })).toBeVisible();
       await expectUserMessageCount(page, 2);
 
+      await scrollChatAwayFromBottom(page, {
+        deltaY: -900,
+        minDistanceFromBottom: 300,
+      });
       await userMessage(page, firstPrompt).hover();
       await page.getByTestId("rewind-menu-trigger").first().click();
       const rewindSheet = page.getByTestId("rewind-menu-content");