Fix/nuclearpurge localstorage

[vedasingh00-rgb]

Description

The handleNuclearPurge function was calling localStorage.clear() which wiped all browser storage indiscriminately, including keys that don't belong to SecuScan. This fix replaces it with a targeted approach that only removes SecuScan-owned keys.

Related Issues

Closes #464

Type of Change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Added a unit test in SettingsSaveReset.test.tsx that:

• Sets up SecuScan-owned keys (secuscan-config, secuscan_api_key, secuscan-saved-views, sidebar-expanded) and an unrelated key (some-other-app-key).
• Triggers the Nuclear Purge and confirms the action.
• Verifies all SecuScan keys are removed.
• Verifies the unrelated keys are preserved.

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.

[vedasingh00-rgb]

Hi @utksh1 , I have addressed the issue. Could you please review the PR when you get a chance?

[utksh1]

Approved. The purge action now removes SecuScan-owned localStorage keys without clearing unrelated browser storage, and the behavior is covered by a focused Settings test. CI is green.