stabilize desktop chat

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

@@ -5,7 +5,6 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
-import javafx.scene.control.Hyperlink;
 import javafx.scene.control.Label;
 import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
@@ -124,6 +123,7 @@ public class ChatController {
 
     @FXML
     void btnSendClicked() {
+        try {
             if (selectedConversation == null) {
                 lblChatStatus.setText("Select a conversation");
                 return;
@@ -139,6 +139,13 @@ public class ChatController {
             if (!sent) {
                 sendMessageFallback(selectedConversation.getId(), content);
             }
+        } catch (Exception e) {
+            ActivityLogger.getInstance().logException(
+                    "ChatController.btnSendClicked",
+                    e,
+                    "Sending chat message");
+            lblChatStatus.setText("Chat send failed");
+        }
     }
 
     private void loadCustomers() {
@@ -224,17 +231,31 @@ public class ChatController {
     private void renderMessages(List<MessageResponse> messages) {
         vbMessages.getChildren().clear();
         for (MessageResponse message : messages) {
+            try {
                 vbMessages.getChildren().add(createMessageBubble(message));
+            } catch (Exception e) {
+                ActivityLogger.getInstance().logException(
+                        "ChatController.renderMessages",
+                        e,
+                        "Rendering chat message");
+            }
         }
         scrollMessagesToBottom();
     }
 
     private void appendMessageIfSelected(MessageResponse message) {
+        try {
             upsertConversationForMessage(message);
             if (selectedConversation != null && selectedConversation.getId().equals(message.getConversationId())) {
                 vbMessages.getChildren().add(createMessageBubble(message));
                 scrollMessagesToBottom();
             }
+        } catch (Exception e) {
+            ActivityLogger.getInstance().logException(
+                    "ChatController.appendMessageIfSelected",
+                    e,
+                    "Appending chat message");
+        }
     }
 
     private void upsertConversation(ConversationResponse conversation) {
@@ -306,10 +327,9 @@ public class ChatController {
             if (message.getAttachmentSizeBytes() != null && message.getAttachmentSizeBytes() > 0) {
                 attachmentLabel = attachmentLabel + " (" + formatSize(message.getAttachmentSizeBytes()) + ")";
             }
-            Hyperlink attachment = new Hyperlink(attachmentLabel);
+            Label attachment = new Label(attachmentLabel);
             attachment.setWrapText(true);
-            attachment.setOnAction(event -> openAttachment(message.getAttachmentUrl()));
+            attachment.setStyle("-fx-text-fill: " + (mine ? "#dbeafe" : "#0f766e") + "; -fx-underline: true;");
-            attachment.setStyle("-fx-text-fill: " + (mine ? "#dbeafe" : "#0f766e") + ";");
             bubble.getChildren().add(attachment);
         }
 
@@ -368,18 +388,6 @@ public class ChatController {
     private void scrollMessagesToBottom() {
         Platform.runLater(() -> spMessages.setVvalue(1.0));
     }
-
-    private void openAttachment(String url) {
-        try {
-            java.awt.Desktop.getDesktop().browse(java.net.URI.create(url));
-        } catch (Exception e) {
-            ActivityLogger.getInstance().logException(
-                    "ChatController.openAttachment",
-                    e,
-                    "Opening chat attachment");
-        }
-    }
-
     private String formatSize(Long bytes) {
         if (bytes == null || bytes <= 0) {
             return "";