From 3479c445f81cd3df9f0eda097f5b7503388dfc5d Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Mon, 9 Mar 2026 07:27:51 +0200
Subject: tui: remove flame selected underline

---
 internal/tui/flamegraph/renderer.go      |  2 +-
 internal/tui/flamegraph/renderer_test.go | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/internal/tui/flamegraph/renderer.go b/internal/tui/flamegraph/renderer.go
index e4c4043..80390fe 100644
--- a/internal/tui/flamegraph/renderer.go
+++ b/internal/tui/flamegraph/renderer.go
@@ -476,7 +476,7 @@ func styleForFrame(idx int, frame tuiFrame, selectedPath string, subtreeSet, mat
 			selectedBg = lipgloss.Color("129")
 			selectedFg = lipgloss.Color("15")
 		}
-		return base.Background(selectedBg).Foreground(selectedFg).Bold(true).Underline(true)
+		return base.Background(selectedBg).Foreground(selectedFg).Bold(true)
 	}
 
 	if isMatch {
diff --git a/internal/tui/flamegraph/renderer_test.go b/internal/tui/flamegraph/renderer_test.go
index c546200..7adc82d 100644
--- a/internal/tui/flamegraph/renderer_test.go
+++ b/internal/tui/flamegraph/renderer_test.go
@@ -212,6 +212,28 @@ func TestFrameLabelAddsSelectionAndMatchMarkers(t *testing.T) {
 	}
 }
 
+func TestSelectedFrameStyleDoesNotUnderline(t *testing.T) {
+	style := styleForFrame(
+		1,
+		tuiFrame{
+			Name: "child",
+			Path: "root" + pathSeparator + "child",
+			Fill: color.RGBA{R: 120, G: 80, B: 160, A: 255},
+		},
+		"root"+pathSeparator+"child",
+		map[int]bool{1: true},
+		nil,
+		1,
+		true,
+		false,
+		false,
+	)
+	rendered := style.Render(" child ")
+	if strings.Contains(rendered, "\x1b[4m") || strings.Contains(rendered, "[4;") || strings.Contains(rendered, ";4m") {
+		t.Fatalf("expected selected flame frame style without underline, got %q", rendered)
+	}
+}
+
 func TestRenderTerminalViewShowsPersistentFilterContext(t *testing.T) {
 	snapshot := &snapshotNode{
 		Name:  "root",
-- 
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