b4aa07577f
ShadowverseTranslationMiddleware throws InvalidOperationException when a Unity client posts an encrypted msgpack body to an action with zero [FromBody] parameters — it has no target type for the deserializer. Tests pass because they post JSON directly with no UnityPlayer UA and the middleware short-circuits. Same defect already fixed on /replay/info in 216dcab; this catches up the friend system shipped 2026-06-09. Fixed actions: info, receive_apply_info, send_apply_info, played_together_info, reject_apply_all, cancel_apply_all. Tests updated to post the BaseRequest auth fields so [ApiController] model validation passes (BaseRequest.ViewerId is non-nullable string). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>