Sub-ticket of VENUS-106 Migrate uploadPracticaImage from Server Action to Route Handler POST /api/practica-image — decouples image upload transport from the global serverActions.bodySizeLimit (which VENUS-incident raised to 12mb). Keeps SA cap tight (1MB) for all other actions while allowing the 10MB image path. Not needed for correctness (bytes already route to api-images); transport-hardening follow-up. · venus