api [nfc]: Rename DmRecipient to DmDisplayRecipient

We will use this name for a different purpose later.

Author: PIG208

lib/api/model/model.dart

@@ -766,46 +766,46 @@ class StreamMessage extends Message {
 }
 
 @JsonSerializable(fieldRename: FieldRename.snake)
-class DmRecipient {
+class DmDisplayRecipient {
   final int id;
   final String email;
   final String fullName;
 
   // final String? shortName; // obsolete, ignore
   // final bool? isMirrorDummy; // obsolete, ignore
 
-  DmRecipient({required this.id, required this.email, required this.fullName});
+  const DmDisplayRecipient({required this.id, required this.email, required this.fullName});
 
-  factory DmRecipient.fromJson(Map<String, dynamic> json) =>
-    _$DmRecipientFromJson(json);
+  factory DmDisplayRecipient.fromJson(Map<String, dynamic> json) =>
+    _$DmDisplayRecipientFromJson(json);
 
-  Map<String, dynamic> toJson() => _$DmRecipientToJson(this);
+  Map<String, dynamic> toJson() => _$DmDisplayRecipientToJson(this);
 
   @override
-  String toString() => 'DmRecipient(id: $id, email: $email, fullName: $fullName)';
+  String toString() => 'DmDisplayRecipient(id: $id, email: $email, fullName: $fullName)';
 
   @override
   bool operator ==(Object other) {
-    if (other is! DmRecipient) return false;
+    if (other is! DmDisplayRecipient) return false;
     return other.id == id && other.email == email && other.fullName == fullName;
   }
 
   @override
-  int get hashCode => Object.hash('DmRecipient', id, email, fullName);
+  int get hashCode => Object.hash('DmDisplayRecipient', id, email, fullName);
 }
 
-class DmRecipientListConverter extends JsonConverter<List<DmRecipient>, List<dynamic>> {
-  const DmRecipientListConverter();
+class DmDisplayRecipientListConverter extends JsonConverter<List<DmDisplayRecipient>, List<dynamic>> {
+  const DmDisplayRecipientListConverter();
 
   @override
-  List<DmRecipient> fromJson(List<dynamic> json) {
-    return json.map((e) => DmRecipient.fromJson(e as Map<String, dynamic>))
+  List<DmDisplayRecipient> fromJson(List<dynamic> json) {
+    return json.map((e) => DmDisplayRecipient.fromJson(e as Map<String, dynamic>))
       .toList(growable: false)
       ..sort((a, b) => a.id.compareTo(b.id));
   }
 
   @override
-  List<dynamic> toJson(List<DmRecipient> object) => object;
+  List<dynamic> toJson(List<DmDisplayRecipient> object) => object;
 }
 
 @JsonSerializable(fieldRename: FieldRename.snake)
@@ -826,8 +826,8 @@ class DmMessage extends Message {
   /// from the store.
   // TODO(server): Document that it's all users.  That statement is based on
   //   reverse-engineering notes in zulip-mobile:src/api/modelTypes.js at PmMessage.
-  @DmRecipientListConverter()
-  final List<DmRecipient> displayRecipient;
+  @DmDisplayRecipientListConverter()
+  final List<DmDisplayRecipient> displayRecipient;
 
   /// The user IDs of all users in the thread, sorted numerically.
   ///

lib/api/model/model.g.dart

@@ -172,9 +172,9 @@ void main() {
       return DmMessage.fromJson({ ...baseJson, ...specialJson });
     }
 
-    Iterable<DmRecipient> asRecipients(Iterable<User> users) {
+    Iterable<DmDisplayRecipient> asRecipients(Iterable<User> users) {
       return users.map((u) =>
-        DmRecipient(id: u.userId, email: u.email, fullName: u.fullName));
+        DmDisplayRecipient(id: u.userId, email: u.email, fullName: u.fullName));
     }
 
     Map<String, dynamic> withRecipients(Iterable<User> recipients) {