fix: [IOBP-2384] CGN card details header wrong focus

[soixdev91]

Short description

Wrapped CgnAnimatedBackground’s WebView with a non-accessible View to prevent it from receiving focus during 2-switch navigation.

List of changes proposed in this pull request

• Wrapped the background WebView with a View using:
  importantForAccessibility="no-hide-descendants"
  accessible={false}
  accessibilityElementsHidden={true}
• Prevented the background animation from stealing accessibility focus during switch-based navigation

How to test

Enable 2-switch navigation on device, from CGN_DETAILS verify that the animated background is skipped.

Previous	New
Registrazione.schermo.2025-12-19.alle.17.37.59.mov	Registrazione.schermo.2025-12-19.alle.17.41.10.mov

[github-actions]

PR Title Validation for conventional commit type

✅ All good! PR title follows the conventional commit type.

[github-actions]

Jira Pull Request Link

This Pull Request refers to Jira issues:

• IOBP-2384

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.95%. Comparing base (9b4b095) to head (ad03b6f).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7734   +/-   ##
=======================================
  Coverage   59.95%   59.95%           
=======================================
  Files        1910     1910           
  Lines       41828    41828           
  Branches     9712     9632   -80     
=======================================
  Hits        25078    25078           
- Misses      16665    16676   +11     
+ Partials       85       74   -11     

Files with missing lines	Coverage Δ
...res/bonus/cgn/components/CgnAnimatedBackground.tsx	85.71% <ø> (ø)

... and 11 files with indirect coverage changes

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