Route files scrolling to grouped-directory offset

2 files changed, 31 insertions, 0 deletions

diff --git a/internal/tui/dashboard/model.go b/internal/tui/dashboard/model.go
index 1a770f3..966e93e 100644
--- a/internal/tui/dashboard/model.go
+++ b/internal/tui/dashboard/model.go
@@ -175,6 +175,9 @@ func (m *Model) handleScrollKey(keyStr string) bool {
 	case TabSyscalls:
 		return scrollOffset(keyStr, &m.syscallsOffset, m.maxSyscallsRows())
 	case TabFiles:
+		if m.filesDirGrouped {
+			return scrollOffset(keyStr, &m.filesDirOffset, m.maxFilesDirRows())
+		}
 		return scrollOffset(keyStr, &m.filesOffset, m.maxFilesRows())
 	case TabProcesses:
 		return scrollOffset(keyStr, &m.processesOffset, m.maxProcessesRows())
@@ -216,6 +219,13 @@ func (m Model) maxFilesRows() int {
 	return m.latest.FilesCount()
 }
 
+func (m Model) maxFilesDirRows() int {
+	if m.latest == nil {
+		return 0
+	}
+	return len(aggregateFilesByDir(m.latest.Files()))
+}
+
 func (m Model) maxProcessesRows() int {
 	if m.latest == nil {
 		return 0
diff --git a/internal/tui/dashboard/model_test.go b/internal/tui/dashboard/model_test.go
index 1f479ab..489c14b 100644
--- a/internal/tui/dashboard/model_test.go
+++ b/internal/tui/dashboard/model_test.go
@@ -140,6 +140,27 @@ func TestFilesTabScrollsWithJK(t *testing.T) {
 	}
 }
 
+func TestFilesTabGroupedScrollUsesDirectoryOffset(t *testing.T) {
+	m := NewModelWithConfig(nil, nil, 250, common.DefaultKeyMap())
+	m.activeTab = TabFiles
+	m.filesDirGrouped = true
+	snap := statsengine.NewSnapshot(nil, nil, nil, nil, []statsengine.FileSnapshot{
+		{Path: "/a/f1"},
+		{Path: "/a/f2"},
+		{Path: "/b/f3"},
+	}, nil, statsengine.HistogramSnapshot{}, statsengine.HistogramSnapshot{})
+	m.latest = &snap
+
+	next, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'j'}})
+	model := next.(Model)
+	if model.filesDirOffset != 1 {
+		t.Fatalf("expected grouped dir offset 1 after j, got %d", model.filesDirOffset)
+	}
+	if model.filesOffset != 0 {
+		t.Fatalf("expected flat files offset unchanged, got %d", model.filesOffset)
+	}
+}
+
 func TestDirGroupKeyTogglesOnlyOnFilesTab(t *testing.T) {
 	m := NewModelWithConfig(nil, nil, 250, common.DefaultKeyMap())
 	m.activeTab = TabFiles