chore(ci): improve bundle size check

[joaoloureirop]

Description

Updates the JS bundle size check CI job so that on pull requests it compares the generated ios/main.jsbundle against the bundle built at the merge base of the PR and the base branch, and writes a markdown summary (sizes and delta) to the job summary. The workflow uses a full clone (fetch-depth: 0) so git merge-base works, then restores the PR HEAD bundle before the existing upload-artifact step so downstream jobs still receive the PR’s bundle.

Note: The previous 55 MB ceiling enforced by ./scripts/js-bundle-stats.sh is no longer invoked in this job; the change focuses on PR delta visibility rather than a fixed max-size failure.

Changelog

CHANGELOG entry: null

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/MCWP-476

Manual testing steps

Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I've included tests if applicable
• I've documented my code using JSDoc format if applicable
• I've applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[github-actions]

🔍 Smart E2E Test Selection

⏭️ Smart E2E selection skipped - draft PR

All E2E tests pre-selected.

View GitHub Actions results

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

✅ E2E Fixture Validation — Schema is up to date
17 value mismatches detected (expected — fixture represents an existing user).
View details