After changing the AI provider and model, how do I apply the settings and test the connection?

1. On the "AI Settings" page, select an AI provider and model, and enter the API Key. 2. Click "Update Settings" to save the provider and model together. Saving also activates the settings. 3. Click "Test Connection" and wait a few seconds. The test uses the saved settings. Changes made without clicking "Update Settings" will not be included in the test.