fix: camera black screen UI

[jimcase]

Description

The logic to avoid the black screen when switching between front and back cameras involves stopping the current scan, setting a transition state, and then restarting the scan once the transition is complete.

Checklist before requesting a review

Issue ticket number and link

• This PR has a valid ticket number or issue: [link]

Testing & Validation

• This PR has been tested/validated in IOS, Android and browser.
• The code has been tested locally with test coverage match expectations.
• Added new Unit/Component testing (if relevant).

Security

• No secrets are being committed (i.e. credentials, PII)
• This PR does not have any significant security implications

Code Review

• There is no unused functionality or blocks of commented out code (otherwise, please explain below)
• In addition to this PR, all relevant documentation (e.g. Confluence) and architecture diagrams (e.g. Miro) were updated

Design Review

• If this PR contains changes to the UI, it has gone through a design review with UX Designer or Product owner.
• In case PR contains changes to the UI, add some screenshots to notice the differences

---

IOS

Before

After

ScreenRecording_02-27-2025.10-55-03_1.mov

Android

Before

After

android-video_2025-02-27_11-08-56.mp4

[sdisalvo-crd]

Tested and it seems to work fine. No further comments other than that about the color variable.

[obstar]

tested, all good