task 350: add TabFlame tab infrastructure

4 files changed, 21 insertions, 9 deletions

diff --git a/internal/tui/dashboard/model.go b/internal/tui/dashboard/model.go
index f097da7..0a9915b 100644
--- a/internal/tui/dashboard/model.go
+++ b/internal/tui/dashboard/model.go
@@ -166,7 +166,7 @@ func (m Model) handleKey(msg tea.KeyPressMsg) (tea.Model, tea.Cmd) {
 			m.activeTab = TabStream
 			handled = true
 		case key.Matches(msg, m.keys.Seven):
-			m.activeTab = TabStream
+			m.activeTab = TabFlame
 			handled = true
 		case key.Matches(msg, m.keys.Refresh):
 			snap := m.snapshot()
@@ -378,6 +378,8 @@ func renderActiveTab(tab Tab, snap *statsengine.Snapshot, streamModel *eventstre
 		return renderProcessesWithOffset(snap, width, height, processesOffset, pidFilter)
 	case TabLatency:
 		return renderLatencyGapsTab(snap, width, height)
+	case TabFlame:
+		return common.PanelStyle.Render("Flame: waiting for model...")
 	default:
 		return common.PanelStyle.Render("Unknown tab")
 	}
diff --git a/internal/tui/dashboard/model_test.go b/internal/tui/dashboard/model_test.go
index 642c702..c9a1cb9 100644
--- a/internal/tui/dashboard/model_test.go
+++ b/internal/tui/dashboard/model_test.go
@@ -48,8 +48,8 @@ func TestKeySwitchingChangesActiveTab(t *testing.T) {
 
 	next, _ = model.Update(tea.KeyPressMsg{Code: []rune{'7'}[0], Text: string([]rune{'7'})})
 	model = next.(Model)
-	if model.activeTab != TabStream {
-		t.Fatalf("expected stream tab on key 7, got %v", model.activeTab)
+	if model.activeTab != TabFlame {
+		t.Fatalf("expected flame tab on key 7, got %v", model.activeTab)
 	}
 
 	next, _ = model.Update(tea.KeyPressMsg{Code: []rune{'6'}[0], Text: string([]rune{'6'})})
diff --git a/internal/tui/dashboard/tabs.go b/internal/tui/dashboard/tabs.go
index 62c7762..731e21f 100644
--- a/internal/tui/dashboard/tabs.go
+++ b/internal/tui/dashboard/tabs.go
@@ -25,6 +25,8 @@ const (
 	TabLatency
 	// TabStream is the live event stream tab.
 	TabStream
+	// TabFlame is the live flamegraph tab.
+	TabFlame
 )
 
 var allTabs = []Tab{
@@ -34,6 +36,7 @@ var allTabs = []Tab{
 	TabProcesses,
 	TabLatency,
 	TabStream,
+	TabFlame,
 }
 
 func (t Tab) String() string {
@@ -50,6 +53,8 @@ func (t Tab) String() string {
 		return "Latency+Gaps"
 	case TabStream:
 		return "Stream"
+	case TabFlame:
+		return "Flame"
 	default:
 		return "Unknown"
 	}
@@ -192,6 +197,8 @@ func tabLabel(tab Tab, short bool) string {
 		return "Lat"
 	case TabStream:
 		return "Str"
+	case TabFlame:
+		return "Flm"
 	default:
 		return "Unk"
 	}
diff --git a/internal/tui/dashboard/tabs_test.go b/internal/tui/dashboard/tabs_test.go
index 1148103..16f8b76 100644
--- a/internal/tui/dashboard/tabs_test.go
+++ b/internal/tui/dashboard/tabs_test.go
@@ -11,17 +11,20 @@ func TestTabNavigationWraps(t *testing.T) {
 	if got := nextTab(TabLatency); got != TabStream {
 		t.Fatalf("expected next after latency+gaps to be stream, got %v", got)
 	}
-	if got := nextTab(TabStream); got != TabOverview {
-		t.Fatalf("expected wrap to overview from stream, got %v", got)
+	if got := nextTab(TabStream); got != TabFlame {
+		t.Fatalf("expected next after stream to be flame, got %v", got)
 	}
-	if got := prevTab(TabOverview); got != TabStream {
-		t.Fatalf("expected wrap to stream, got %v", got)
+	if got := nextTab(TabFlame); got != TabOverview {
+		t.Fatalf("expected wrap to overview from flame, got %v", got)
+	}
+	if got := prevTab(TabOverview); got != TabFlame {
+		t.Fatalf("expected wrap to flame, got %v", got)
 	}
 }
 
 func TestRenderTabBarContainsLabels(t *testing.T) {
 	out := renderTabBar(TabOverview, 100)
-	for _, label := range []string{"Overview", "Syscalls", "Files", "Processes", "Latency+Gaps", "Stream"} {
+	for _, label := range []string{"Overview", "Syscalls", "Files", "Processes", "Latency+Gaps", "Stream", "Flame"} {
 		if !strings.Contains(out, label) {
 			t.Fatalf("expected tab label %q in tab bar", label)
 		}
@@ -34,7 +37,7 @@ func TestRenderTabBarSmallWidthUsesSingleLine(t *testing.T) {
 	if len(lines) != 1 {
 		t.Fatalf("expected single-line tab bar at width 70, got %d lines", len(lines))
 	}
-	if strings.Contains(out, "6:Strea") {
+	if strings.Contains(out, "7:Flam") {
 		t.Fatalf("tab label should not be wrapped/split in small width output")
 	}
 }