Introduce typed API responses and align workflow outputs

Endpoints/ResultsWorkflowService.cs

@@ -1,3 +1,4 @@
+using GameList.Contracts;
 using GameList.Data;
 using GameList.Domain;
 using Microsoft.EntityFrameworkCore;
@@ -54,8 +55,12 @@ internal sealed class ResultsWorkflowService(AppDbContext db)
                 .Where(id => id != r.Id)
                 .ToList();
 
-            return new
-            {
+            var linkedTitles = linkedIds
+                .Where(nameLookup.ContainsKey)
+                .Select(id => nameLookup[id])
+                .ToList();
+
+            return new ResultItemDto(
                 r.Id,
                 r.Name,
                 r.Author,
@@ -72,12 +77,9 @@ internal sealed class ResultsWorkflowService(AppDbContext db)
                 r.Description,
                 r.Genre,
                 r.ParentSuggestionId,
-                LinkedIds = linkedIds,
-                LinkedTitles = linkedIds
-                    .Where(nameLookup.ContainsKey)
-                    .Select(id => nameLookup[id])
-                    .ToList()
-            };
+                linkedIds,
+                linkedTitles
+            );
         });
 
         return Results.Ok(shaped);