worktime: use sentinel login state errors

Replace string matching in timer sync with errors.Is and add regression tests.

1 files changed, 1 insertions, 1 deletions

diff --git a/internal/cli/timer.go b/internal/cli/timer.go
index 78d6d8d..46292ad 100644
--- a/internal/cli/timer.go
+++ b/internal/cli/timer.go
@@ -242,7 +242,7 @@ func syncWorktimeWithTimer(start bool) error {
 	}
 
 	// Avoid failing timer commands on no-op state sync mismatches.
-	if strings.Contains(err.Error(), "already logged in") || strings.Contains(err.Error(), "not logged in") {
+	if errors.Is(err, worktime.ErrAlreadyLoggedIn) || errors.Is(err, worktime.ErrNotLoggedIn) {
 		return nil
 	}