Clamp grouped-files cursor on stats refresh

2 files changed, 22 insertions, 0 deletions

diff --git a/internal/tui/dashboard/model.go b/internal/tui/dashboard/model.go
index 966e93e..d3d8322 100644
--- a/internal/tui/dashboard/model.go
+++ b/internal/tui/dashboard/model.go
@@ -90,6 +90,7 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.latest = msg.Snap
 		m.syscallsOffset = clampOffset(m.syscallsOffset, m.maxSyscallsRows())
 		m.filesOffset = clampOffset(m.filesOffset, m.maxFilesRows())
+		m.filesDirOffset = clampOffset(m.filesDirOffset, m.maxFilesDirRows())
 		m.processesOffset = clampOffset(m.processesOffset, m.maxProcessesRows())
 		m.streamModel.Refresh()
 		return m, nil
diff --git a/internal/tui/dashboard/model_test.go b/internal/tui/dashboard/model_test.go
index 489c14b..c243018 100644
--- a/internal/tui/dashboard/model_test.go
+++ b/internal/tui/dashboard/model_test.go
@@ -257,6 +257,27 @@ func TestStatsTickMsgUpdatesLatestSnapshot(t *testing.T) {
 	}
 }
 
+func TestStatsTickClampsGroupedFilesOffset(t *testing.T) {
+	snap := statsengine.NewSnapshot(
+		nil,
+		nil,
+		nil,
+		nil,
+		[]statsengine.FileSnapshot{{Path: "/a/f1"}, {Path: "/a/f2"}},
+		nil,
+		statsengine.HistogramSnapshot{},
+		statsengine.HistogramSnapshot{},
+	)
+	m := NewModel(nil, nil)
+	m.filesDirOffset = 10
+
+	next, _ := m.Update(messages.StatsTickMsg{Snap: &snap})
+	model := next.(Model)
+	if model.filesDirOffset != 0 {
+		t.Fatalf("expected grouped files offset clamped to 0, got %d", model.filesDirOffset)
+	}
+}
+
 func TestViewRendersTabBarAndHelp(t *testing.T) {
 	m := NewModelWithConfig(nil, nil, 1000, common.DefaultKeyMap())
 	out := m.View()