refactor: extract editMessage helper to pages/sessions.ts

[empiricalrun]

Summary

Found a repeated edit message flow duplicated identically across 3 test files. Extracted it into a single editMessage helper in tests/pages/sessions.ts.

The pattern (repeated in 3 files)

const userMessageBubble = page.locator('[data-message-id]').filter({ hasText: currentMessage }).first();
await userMessageBubble.hover();
await userMessageBubble.getByRole('button', { name: 'Edit message' }).click();
const editTextbox = page.getByRole('textbox', { name: 'Edit your message...' });
await editTextbox.fill(newMessage);
await page.getByRole('button', { name: 'Save Changes' }).click();

New helper in tests/pages/sessions.ts

export async function editMessage(page: Page, currentMessage: string, newMessage: string): Promise<void>

Files updated

• tests/pages/sessions.ts — added the editMessage helper with JSDoc
• tests/sessions.spec.ts — uses editMessage in the "edit message updates assistant response" test
• tests/edit-message-github-diff.spec.ts — uses editMessage in the edit + GitHub diff test
• tests/edit-message-branch-restore.spec.ts — uses editMessage in the branch restore test

TypeScript compiles with no errors.

PR created from session #122842

^{Updated at 2026-04-22 04:58:55.214 UTC}