fix(config): prevent silent success on empty configs and fix context switch error propagation

cmd/harbor/root/configurations/apply.go

@@ -64,6 +64,10 @@ Make sure to run 'harbor config get' first to populate the local config file wit
 				default:
 					return fmt.Errorf("unsupported file type: %s, expected '.yaml/.yml' or '.json'", fileType)
 				}
+
+				if configurations == nil {
+					return fmt.Errorf("config file is empty or contains no valid configurations")
+				}
 			} else {
 				return fmt.Errorf("no config file specified")
 			}

cmd/harbor/root/context/switch.go

@@ -50,7 +50,7 @@ func SwitchContextCommand() *cobra.Command {
 						return fmt.Errorf("failed to update config: %w", err)
 					}
 				} else {
-					fmt.Println("context doesn't exist")
+					return fmt.Errorf("context '%s' doesn't exist", newActiveCredential)
 				}
 			} else {
 				res, err := prompt.GetActiveContextFromUser()