E2E[Content Summarization]: Prefer user-facing attributes

[yogeshbhutkar]

What, Why, and How?

Playwright recommends using user-facing locators (example, getByRole) instead of CSS classes or DOM-structure selectors wherever possible. This is because CSS classes and markup structure are implementation details that can change during design or refactoring without changing the actual user experience, which can make tests fail even though the feature still works (Docs).

This PR updates the content summarization E2E spec to follow the Playwright best practices by replacing hard-coded page.locator(...) calls with role-based locators. This should make the test less brittle because it now targets the UI the way a user, or assistive technology, understands it rather than depending on implementation details.

Apart from making the test more resilient to CSS and markup changes, this also makes the assertions easier to read and understand. For example:

// Before:
await page
	.locator( '.editor-sidebar__panel-tabs button:has-text("Post")' )
	.click();

// After:
await page.getByRole( 'tab', { name: 'Post' } ).click();

Note: This PR deliberately scopes the change to the Content Summarization E2E spec only. If we agree this approach is preferable for the reasons above, we can apply it to other E2E specs incrementally, a few modules at a time.

Use of AI Tools

AI assistance: Yes
Tool(s): Codex
Model(s): GPT-5.5
Used for: Code review

Testing Instructions

CI should be green.

Changelog Entry

Changed - Updated Content Summarization E2E selectors to use Playwright user-facing attributes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.41%. Comparing base (27e202b) to head (cab0bd5).

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #762   +/-   ##
==========================================
  Coverage      76.41%   76.41%           
  Complexity      1828     1828           
==========================================
  Files             87       87           
  Lines           7764     7764           
==========================================
  Hits            5933     5933           
  Misses          1831     1831           

Flag	Coverage Δ
unit	76.41% <ø> (ø)

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[github-actions]

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