OpenRouter bot fixes

desktop/src/main/java/org/example/petshopdesktop/api/dto/chat/MessageResponse.java

@@ -6,6 +6,8 @@ public class MessageResponse {
     private Long id;
     private Long conversationId;
     private Long senderId;
+    private String senderRole;
+    private String senderDisplayName;
     private String senderAvatarUrl;
     private String content;
     private LocalDateTime timestamp;
@@ -38,6 +40,22 @@ public class MessageResponse {
         this.senderId = senderId;
     }
 
+    public String getSenderRole() {
+        return senderRole;
+    }
+
+    public void setSenderRole(String senderRole) {
+        this.senderRole = senderRole;
+    }
+
+    public String getSenderDisplayName() {
+        return senderDisplayName;
+    }
+
+    public void setSenderDisplayName(String senderDisplayName) {
+        this.senderDisplayName = senderDisplayName;
+    }
+
     public String getSenderAvatarUrl() {
         return senderAvatarUrl;
     }

desktop/src/main/java/org/example/petshopdesktop/controllers/ChatController.java

@@ -403,6 +403,11 @@ public class ChatController {
     }
 
     private String resolveAuthorLabel(MessageResponse message) {
+        if ("BOT".equalsIgnoreCase(message.getSenderRole())) {
+            return message.getSenderDisplayName() != null && !message.getSenderDisplayName().isBlank()
+                    ? message.getSenderDisplayName()
+                    : "AI Bot";
+        }
         Long currentUserId = UserSession.getInstance().getUserId();
         if (message.getSenderId() != null && message.getSenderId().equals(currentUserId)) {
             return "You";