fix: unlock redirect back loop

[n3ps]

Description

Fixes the redirect loop when auto unlocking

Changelog

CHANGELOG entry: fix: replace unlock redirect history entry

Related issues

Fixes: #42004

Manual testing steps

1. Set autolock
2. Stay idle in the Accounts list
3. Unlock
4. Click Back

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension 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.

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Note

Low Risk
Low risk: only adjusts react-router navigation options on unlock redirects, with updated tests; main behavior change is back/forward history handling.

Overview
Fixes an unlock redirect loop by changing post-unlock redirects to use navigate(..., { replace: true }) (both for auto-unlock in UnlockPage and for manual unlock submit in the container), preventing an extra history entry from being added.

Updates UnlockPage tests to assert the new replace: true navigation behavior for redirects driven by location.state.from.

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[github-actions]

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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