Add player onboarding and tactical viewer updates

apps/backend/Auth/Contracts/AuthContracts.cs

@@ -37,6 +37,11 @@ public sealed record AuthSessionResponse(
   string RefreshToken,
   DateTimeOffset RefreshTokenExpiresAtUtc);
 
+public sealed record RegisterResponse(
+  Guid UserId,
+  string Email,
+  bool RequiresLogin);
+
 public sealed record ForgotPasswordResponse(
   bool Accepted,
   string? ResetToken = null);

apps/backend/Auth/Contracts/Races.cs

@@ -0,0 +1,7 @@
+namespace SpaceGame.Api.Auth.Contracts;
+
+public sealed record RaceSnapshot(
+  string Id,
+  string Name,
+  string Description,
+  string Icon);