05 - Expansion - Integration testing and cleanup

[gbarkhatov]

Comprehensive testing of the complete expansion visibility flow and cleanup of any temporary implementations or unused code.

• Test complete flow:
  1. Create verified expansion (appears in modal only)
  2. Broadcast verified expansion (appears in Activity with special UI, original hidden)
  3. Wait for confirmation (expansion becomes ACTIVE, localStorage cleanup)
• Verify localStorage cleanup works correctly when expansions become ACTIVE
• Test edge cases:
  • Multiple verified expansions for same original transaction
  • Network errors during broadcast
  • Browser refresh scenarios
• Remove any unused code or temporary implementations
• Update documentation and comments
• Ensure no performance regressions
• Verify all existing functionality still works

Dependencies: #1530 #1531 #1532 #1533 #1534