Use completely standalone Razor template and compiler

DataModel.cs

@@ -17,6 +17,7 @@ public record ThreadPost
     [JsonIgnore]
     public bool IsChapterAnnounce { get; set; } = false;
     public ChapterMetadata? Chapter { get; set; }
+    public List<int>? RepliesTo { get; set; }
 }
 
 public record Metadata
@@ -25,6 +26,7 @@ public record Metadata
     public string Author { get; set; }
     public Uri AuthorPage { get; set; }
     public string? AuthorTwitter { get; set; }
+    public string? Description { get; set; }
     public Uri AssetsBaseUrl { get; set; }
     public string SocialPreview { get; set; }
     public List<int> Threads { get; set; }
@@ -62,6 +64,7 @@ public class TemplateModel
     public Metadata Metadata { get; set; }
     public DateTime Now { get; set; }
     public List<ThreadPost> Posts { get; set; }
+    public List<ThreadPost> AllPosts { get; set; }
     public string BaseUrl { get; set; }
     public string ToolVersion { get; set; }
 }