Sergei 62f70853cb Fix navigation: add isNavigatingAway flag to prevent redirect conflicts
- Added isNavigatingAway state to block auto-redirects when user clicks back
- Both header back button and main button now set this flag before navigating
- Prevents loadBeneficiary from triggering competing redirects

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Co-Authored-By: Claude <noreply@anthropic.com>
2026-01-09 19:52:39 -08:00
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