feat(front): unify success confirmation cards in IAVIA wizard

Summary

This MR unifies the confirmation cards displayed in the IAVIA wizard after successful actions.

Changes

• Merged "Integration configured successfully" and "Test successful" into a single card
• Applied changes across:
  • All integration categories
  • Account creation flow
  • Account replication flow

Benefits

• Cleaner and more consistent user experience
• Reduced UI redundancy
• Easier maintenance of confirmation states

Impact

• Frontend only
• No backend dependency

Testing

• Verified success flow for:
  • Integration configuration
  • Integration test
  • Account creation and replication