Frontend: wire Mes Actifs to real APIs and fix KYC resume navigation
Connected Mes Actifs page to real backend endpoints:
- GET /api/v1/me/assets/overview
- GET /api/v1/me/assets/properties
- GET /api/v1/me/assets/transactions
- Added frontend assets service layer (
assetsService) for real portfolio data. - Updated transaction rendering to use backend explorer links (
explorerUrl) when available. - Added fallback rendering for invested properties when catalogue detail returns
404(to keep investment assets visible). - Fixed KYC navigation from Profile so users resume at their current KYC step instead of restarting from personal info.