net10, the refactor finished, and federation that works

The tree had not compiled since its first commit: Group, DmGroup and
IGroupUsersService were referenced and never written, an IDE rename had
turned the user-settings DTO into the ViewAvatarServer enum, and the settings
were saved as an entity they no longer were.

Built now:
- Group (an ActivityPub Group actor with its own keys, members, invitation
  code and optional password) and DmGroup (a conversation), with
  /clientapi/group/{list,insert,update,join,leave,approve}.
- Posts and DMs: /clientapi/post/{list,insert,delete}, /clientapi/dm/{list,insert};
  DM recipients are local usernames or user@host handles resolved by WebFinger.
- Invitation sign-up and login against the group's invitation code, checking
  the password before any account is created.
- Federation: WebFinger, NodeInfo 2.0, actors at /peasants/{name} (Person,
  Group, and an Application instance actor) with SPKI keys, draft-cavage
  RSA-SHA256 HTTP signatures both ways, an inbox handling Follow (+Accept),
  Undo, Create, Delete and Update, an outbox, notes at /posts/{id}, and a
  persisted, retried, signed delivery queue. A post to a group is announced
  by the group to its followers (FEP-1b12).
- The unused, broken typed ActivityPub models are replaced by a renderer;
  NSign's HMAC setup, which could not federate, is gone.

Upgrade: net10.0, MongoDB.Entities 25.1 (instance DB API, Standard GUIDs),
Swashbuckle 10 / OpenApi 2, Serilog.AspNetCore 10, MailKit 4.18,
PasswordGenerator 3. The JWT keys are 64 bytes (IdentityModel 8 refuses
shorter for HS512). Production runs its own mongod on 127.0.0.1:27022, as
Sintopia's apps do, and deploys to privapub.thepra.dev from the build runner.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

PrivaPub.ClientModels/Group/InsertGroupForm.cs

@@ -0,0 +1,30 @@
+using PrivaPub.ClientModels.Resources;
+using PrivaPub.ClientModels.ValidatorAttributes;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.Group
+{
+	public class InsertGroupForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(32, MinimumLength = 3, ErrorMessageResourceName = "StringLengthMinMax", ErrorMessageResourceType = typeof(ErrorsResource)),
+			RegularExpression("^[a-z0-9_]+$", ErrorMessageResourceName = "EmptySpacesNotAllowed", ErrorMessageResourceType = typeof(ErrorsResource)),
+			NoWhiteSpaces]
+		public string UserName { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(64, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Name { get; set; }
+
+		[StringLength(2000, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Description { get; set; }
+
+		public string InvitationPassword { get; set; }
+		public bool IsDiscoverable { get; set; } = true;
+		public bool ManuallyApprovesMembers { get; set; }
+	}
+}

PrivaPub.ClientModels/Group/JoinGroupForm.cs

@@ -0,0 +1,28 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.Group
+{
+	public class JoinGroupForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(Constants.GroupInvitationLength, MinimumLength = Constants.GroupInvitationLength,
+				ErrorMessageResourceName = "StringLengthMinMax", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string InvitationCode { get; set; }
+
+		public string InvitationPassword { get; set; }
+	}
+
+	public class GroupMembershipForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string GroupId { get; set; }
+		public string MemberActorURI { get; set; }
+	}
+}

PrivaPub.ClientModels/Group/UpdateGroupForm.cs

@@ -0,0 +1,25 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.Group
+{
+	public class UpdateGroupForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string GroupId { get; set; }
+
+		[StringLength(64, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Name { get; set; }
+		[StringLength(2000, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Description { get; set; }
+
+		public string InvitationPassword { get; set; }
+		public bool RemoveInvitationPassword { get; set; }
+		public bool RegenerateInvitationCode { get; set; }
+		public bool? IsDiscoverable { get; set; }
+		public bool? ManuallyApprovesMembers { get; set; }
+	}
+}

PrivaPub.ClientModels/Group/ViewGroup.cs

@@ -0,0 +1,19 @@
+namespace PrivaPub.ClientModels.Group
+{
+	public class ViewGroup
+	{
+		public string Id { get; set; }
+		public string UserName { get; set; }
+		public string Name { get; set; }
+		public string Description { get; set; }
+		public string Url { get; set; }
+		public string Handle { get; set; }
+		public bool IsDiscoverable { get; set; }
+		public bool ManuallyApprovesMembers { get; set; }
+		public bool IsOwner { get; set; }
+		public string InvitationCode { get; set; }
+		public bool IsPasswordRequired { get; set; }
+		public int MembersCount { get; set; }
+		public DateTime CreationDate { get; set; }
+	}
+}

PrivaPub.ClientModels/InvitationLoginForm.cs

@@ -0,0 +1,14 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels
+{
+	public class InvitationLoginForm : LoginForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(Constants.GroupInvitationLength, MinimumLength = Constants.GroupInvitationLength,
+				ErrorMessageResourceName = "StringLengthMinMax", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string InvitationCode { get; set; }
+	}
+}

PrivaPub.ClientModels/Post/InsertPostForm.cs

@@ -0,0 +1,45 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.Post
+{
+	public class InsertPostForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(5000, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Text { get; set; }
+
+		[StringLength(200, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Title { get; set; }
+
+		public string GroupId { get; set; }
+		public string AnsweringToPostId { get; set; }
+		public bool HasContentWarning { get; set; }
+	}
+
+	public class InsertDmForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+			StringLength(5000, ErrorMessageResourceName = "MaxLengthString", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string Text { get; set; }
+
+		public string DmGroupId { get; set; }
+		public List<string> Recipients { get; set; } = new();//local usernames or user@host handles
+		public bool HasContentWarning { get; set; }
+	}
+
+	public class DeletePostForm
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string AvatarId { get; set; }
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource))]
+		public string PostId { get; set; }
+	}
+}

PrivaPub.ClientModels/Post/ViewPost.cs

@@ -0,0 +1,25 @@
+namespace PrivaPub.ClientModels.Post
+{
+	public class ViewPost
+	{
+		public string Id { get; set; }
+		public string ObjectURI { get; set; }
+		public string AuthorAvatarId { get; set; }
+		public string AuthorActorURI { get; set; }
+		public string GroupId { get; set; }
+		public string DmGroupId { get; set; }
+		public string AnsweringToPostId { get; set; }
+		public string Title { get; set; }
+		public string Text { get; set; }
+		public bool HasContentWarning { get; set; }
+		public bool IsFederatedCopy { get; set; }
+		public DateTime CreationDate { get; set; }
+	}
+
+	public class ViewDmGroup
+	{
+		public string Id { get; set; }
+		public List<string> Members { get; set; } = new();
+		public DateTime UpdatedAt { get; set; }
+	}
+}

PrivaPub.ClientModels/PrivaPub.ClientModels.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <!--<Nullable>enable</Nullable>-->
   </PropertyGroup>

PrivaPub.ClientModels/Resources/FieldsNameResource.Designer.cs

@@ -1,4 +1,4 @@
-//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
 //     Runtime Version:4.0.30319.42000
@@ -396,6 +396,30 @@ namespace PrivaPub.ClientModels.Resources {
         /// <summary>
         ///   Looks up a localized string similar to Name.
         /// </summary>
+        public static string AvatarId {
+            get {
+                return ResourceManager.GetString("AvatarId", resourceCulture);
+            }
+        }
+        
+        public static string Biography {
+            get {
+                return ResourceManager.GetString("Biography", resourceCulture);
+            }
+        }
+        
+        public static string LanguageCode {
+            get {
+                return ResourceManager.GetString("LanguageCode", resourceCulture);
+            }
+        }
+        
+        public static string UserName {
+            get {
+                return ResourceManager.GetString("UserName", resourceCulture);
+            }
+        }
+        
         public static string Name {
             get {
                 return ResourceManager.GetString("Name", resourceCulture);

PrivaPub.ClientModels/Resources/FieldsNameResource.it.resx

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema 
@@ -315,4 +315,16 @@
   <data name="Usernames to search and add" xml:space="preserve">
     <value>Soprannomi da ricercare e aggiungere</value>
   </data>
-</root>
+  <data name="AvatarId" xml:space="preserve">
+    <value>Avatar</value>
+  </data>
+  <data name="Biography" xml:space="preserve">
+    <value>Biografia</value>
+  </data>
+  <data name="LanguageCode" xml:space="preserve">
+    <value>Lingua</value>
+  </data>
+  <data name="UserName" xml:space="preserve">
+    <value>Nome utente</value>
+  </data>
+</root>

PrivaPub.ClientModels/Resources/FieldsNameResource.resx

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema 
@@ -315,4 +315,16 @@
   <data name="Usernames to search and add" xml:space="preserve">
     <value>Usernames to search and add</value>
   </data>
-</root>
+  <data name="AvatarId" xml:space="preserve">
+    <value>Avatar</value>
+  </data>
+  <data name="Biography" xml:space="preserve">
+    <value>Biography</value>
+  </data>
+  <data name="LanguageCode" xml:space="preserve">
+    <value>Language</value>
+  </data>
+  <data name="UserName" xml:space="preserve">
+    <value>Username</value>
+  </data>
+</root>

PrivaPub.ClientModels/User/Avatar/ViewAvatar.cs

@@ -1,10 +1,12 @@
-using System.Text.Json.Serialization;
+using System.Text.Json.Serialization;
 
 namespace PrivaPub.ClientModels.User.Avatar
 {
 	[JsonSerializable(typeof(ViewAvatar))]
 	public class ViewAvatar
 	{
+		public string Id { get; set; }
+		public string Handle { get; set; }
 		public string Url { get; set; }//url
 		public string Name { get; set; }//name
 		public string UserName { get; set; }//preferredUsername

PrivaPub.ClientModels/User/JwtUser.cs

@@ -1,4 +1,4 @@
-namespace PrivaPub.ClientModels.User
+namespace PrivaPub.ClientModels.User
 {
 	public class JwtUser
 	{
@@ -8,6 +8,6 @@
 		public List<string> Policies { get; set; } = new();
 		public string Token { get; set; }
 		public long Expiration { get; set; }
-		public ViewAvatarServer UserSettings { get; set; } = new();
+		public ViewUserSettings UserSettings { get; set; } = new();
 	}
 }

PrivaPub.ClientModels/User/ViewUserSettings.cs

@@ -0,0 +1,25 @@
+using PrivaPub.ClientModels.Resources;
+
+using System.ComponentModel.DataAnnotations;
+
+namespace PrivaPub.ClientModels.User
+{
+	public class ViewUserSettings
+	{
+		[Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(ErrorsResource)),
+				Display(Name = nameof(LanguageCode), ResourceType = typeof(FieldsNameResource))]
+		public string LanguageCode { get; set; } = "en";
+
+		[Range(0, 359, ErrorMessageResourceName = nameof(Range), ErrorMessageResourceType = typeof(ErrorsResource))]
+		public short LightThemeIndexColour { get; set; } = 25;
+		[Range(0, 359, ErrorMessageResourceName = nameof(Range), ErrorMessageResourceType = typeof(ErrorsResource))]
+		public short DarkThemeIndexColour { get; set; } = 215;
+		[Range(-2, 359, ErrorMessageResourceName = nameof(Range), ErrorMessageResourceType = typeof(ErrorsResource))]
+		public short IconsThemeIndexColour { get; set; } = 25;
+
+		public bool PreferSystemTheming { get; set; } = false;
+		public bool ThemeIsDarkMode { get; set; } = false;
+		public bool ThemeIsLightGray { get; set; } = false;
+		public bool ThemeIsDarkGray { get; set; } = false;
+	}
+}