fix: restore missing logic from refactoring

- Restore HTTP 400 status handling in log viewing that was lost during refactoring
- Restore service installation check in restart command that was missing after refactoring

cmd/cli/commands_log.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net/http"
 	"path/filepath"
 
@@ -110,6 +111,15 @@ func (lc *LogCommand) ViewLogs(cmd *cobra.Command, args []string) error {
 	case http.StatusMovedPermanently:
 		lc.warnRuntimeLoggingNotEnabled()
 		return nil
+	case http.StatusBadRequest:
+		mainLog.Load().Warn().Msg("runtime debugs log is not available")
+		buf, err := io.ReadAll(resp.Body)
+		if err != nil {
+			mainLog.Load().Fatal().Err(err).Msg("failed to read response body")
+		}
+		mainLog.Load().Warn().Msgf("ctrld process response:\n\n%s\n", string(buf))
+		return nil
+	case http.StatusOK:
 	}
 
 	var logs logViewResponse
@@ -117,11 +127,6 @@ func (lc *LogCommand) ViewLogs(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("failed to decode view logs result: %w", err)
 	}
 
-	if logs.Data == "" {
-		mainLog.Load().Notice().Msg("No runtime logs available")
-		return nil
-	}
-
 	fmt.Print(logs.Data)
 	return nil
 }

cmd/cli/commands_service_restart.go

@@ -2,8 +2,10 @@ package cli
 
 import (
 	"context"
+	"errors"
 	"time"
 
+	"github.com/kardianos/service"
 	"github.com/spf13/cobra"
 )
 
@@ -19,6 +21,11 @@ func (sc *ServiceCommand) Restart(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
+	if _, err := s.Status(); errors.Is(err, service.ErrNotInstalled) {
+		mainLog.Load().Warn().Msg("service not installed")
+		return nil
+	}
+
 	p.cfg = &cfg
 	if iface == "" {
 		iface = "auto"