fix(cli): completion with direct connections (--connect, --context, --uncloud-config) (fixes #377)

internal/cli/completion/context.go

@@ -11,6 +11,11 @@ import (
 )
 
 func Contexts(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	// There are no contexts to complete when the CLI uses a direct machine connection (--connect) without a config.
+	if uncli.Config == nil {
+		return nil, cobra.ShellCompDirectiveNoFileComp
+	}
+
 	contexts := slices.Sorted(maps.Keys(uncli.Config.Contexts))
 
 	names := []cobra.Completion{}
@@ -21,7 +26,6 @@ func Contexts(ctx context.Context, uncli *cli.CLI, args []string, toComplete str
 		if strings.HasPrefix(context, toComplete) {
 			names = append(names, context)
 		}
-		names = append(names, context)
 	}
 
 	return names, cobra.ShellCompDirectiveNoFileComp