Add OpenAPI contract and generated frontend client

Endpoints/AuthEndpoints.cs

@@ -11,13 +11,13 @@ public static class AuthEndpoints
 {
     public static void MapAuthEndpoints(this IEndpointRouteBuilder app)
     {
-        var group = app.MapGroup("/api/auth").RequireRateLimiting("auth-sensitive");
+        var group = app.MapGroup("/api/auth").WithTags("Auth").RequireRateLimiting("auth-sensitive");
 
         group.MapGet("/options", async (AppDbContext db) =>
         {
             var ownerExists = await db.Players.AsNoTracking().AnyAsync(p => p.IsOwner);
             return Results.Ok(new AuthOptionsResponse(ownerExists));
-        });
+        }).WithName("GetAuthOptions");
 
         group.MapPost("/register", async ([FromBody] RegisterRequest request, HttpContext ctx, AppDbContext db, IConfiguration config, AuthAttemptMonitor authAttemptMonitor) =>
         {
@@ -94,7 +94,7 @@ public static class AuthEndpoints
                 player.DisplayName,
                 player.IsAdmin
             ));
-        });
+        }).WithName("Register");
 
         group.MapPost("/login", async ([FromBody] LoginRequest request, HttpContext ctx, AppDbContext db, AuthAttemptMonitor authAttemptMonitor) =>
         {
@@ -137,13 +137,13 @@ public static class AuthEndpoints
                 player.DisplayName,
                 player.IsAdmin
             ));
-        });
+        }).WithName("Login");
 
         group.MapPost("/logout", async (HttpContext ctx) =>
         {
             await PlayerIdentityExtensions.SignOutPlayerAsync(ctx);
             return Results.NoContent();
-        });
+        }).WithName("Logout");
     }
 
     private static string NormalizeActor(string? username) => string.IsNullOrWhiteSpace(username) ? "(missing)" : username.Trim();