feat(conversations): align search sender names

internal/handler/api/v1/conversation_serializer.go

@@ -91,11 +91,11 @@ type chatwootConversationSearchPayload struct {
 }
 
 type chatwootConversationSearchMessage struct {
-	Content     string `json:"content"`
-	ID          uint   `json:"id"`
-	SenderName  string `json:"sender_name,omitempty"`
-	MessageType int    `json:"message_type"`
-	CreatedAt   int64  `json:"created_at"`
+	Content     string  `json:"content"`
+	ID          uint    `json:"id"`
+	SenderName  *string `json:"sender_name,omitempty"`
+	MessageType int     `json:"message_type"`
+	CreatedAt   int64   `json:"created_at"`
 }
 
 type chatwootMessageIndexResponse struct {
@@ -189,6 +189,7 @@ func serializeConversationSearch(ctx context.Context, db *gorm.DB, conversation
 			payload.Messages = append(payload.Messages, chatwootConversationSearchMessage{
 				Content:     messages[i].Content,
 				ID:          messages[i].ID,
+				SenderName:  messageSenderName(ctx, db, &messages[i]),
 				MessageType: messageTypeValue(messages[i].MessageType),
 				CreatedAt:   messages[i].CreatedAt.Unix(),
 			})
@@ -463,6 +464,15 @@ func serializeMessageSender(ctx context.Context, db *gorm.DB, message *model.Mes
 	return nil
 }
 
+func messageSenderName(ctx context.Context, db *gorm.DB, message *model.Message) *string {
+	sender := serializeMessageSender(ctx, db, message)
+	if sender == nil {
+		return nil
+	}
+	name, _ := sender["name"].(string)
+	return &name
+}
+
 func serializeContact(contact *model.Contact) map[string]any {
 	return map[string]any{
 		"additional_attributes": jsonObject(contact.AdditionalAttributes),