[Fix] Invalid URL Construction Error When Saving Advanced Settings

[rahul-rocket]

Description:
When clicking the "Save" button after the "Check" button in the Advanced Settings screen, an error dialog is displayed with the message:

Error Message: "Failed to construct 'URL': Invalid URL"

Steps to Reproduce:

1. Navigate to the "Advanced Settings" screen.
2. Enter localhost as the API Host and 3000 as the Port.
3. Click the "Check" button to validate the settings.
4. Click the "Save" button.

Observed Behavior: The application constructs an invalid URL in the format http://localhost:3000:3000, causing the error dialog to appear.

Expected Behavior:

• The application should correctly construct the URL as http://localhost:3000 without duplicating the port.
• The error message should be replaced with a more user-friendly toaster notification instead of a dialog box.