fix(tui-go): event-stream badge tracks session status, not just the socket

The EVENTS panel showed "● live" off m.connected alone, so a completed/failed/
paused session kept reading "live" as long as the websocket was up — stale, since
a terminal session emits no more events. Derive the badge from the selected
session's Status (the same vocabulary the status bar uses): ✓ done, ✗ failed,
‖ paused, ● live while active, ○ idle when disconnected. event_badge_test.go
covers all five.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/tui-go/internal/app/event_badge_test.go

@@ -0,0 +1,33 @@
+package app
+
+import (
+	"strings"
+	"testing"
+)
+
+// The event-stream badge must track the selected session's lifecycle, not just the socket:
+// a terminal/paused session emits no more events, so it must not keep reading "● live".
+func TestEventStreamBadgeReflectsSessionStatus(t *testing.T) {
+	cases := []struct{ status, want string }{
+		{"ACTIVE", "● live"},
+		{"COMPLETED", "✓ done"},
+		{"FAILED", "✗ failed"},
+		{"PAUSED awaiting approval", "‖ paused"},
+	}
+	for _, c := range cases {
+		m := inSessionModel(120, 40)
+		m.connected = true
+		m.sessions[0].Status = c.status
+		if got := m.eventStreamBadge(); !strings.Contains(got, c.want) {
+			t.Errorf("status %q: badge = %q, want substring %q", c.status, got, c.want)
+		}
+	}
+
+	// Disconnected always reads idle, regardless of the session's status.
+	m := inSessionModel(120, 40)
+	m.connected = false
+	m.sessions[0].Status = "ACTIVE"
+	if got := m.eventStreamBadge(); !strings.Contains(got, "○ idle") {
+		t.Errorf("disconnected: badge = %q, want idle", got)
+	}
+}

apps/tui-go/internal/app/view.go

@@ -590,12 +590,7 @@ func (m Model) buildTranscriptRows(w int) ([]string, []int) {
 func (m Model) eventRows(w, h int) []string {
 	t := m.theme
 	header := lipgloss.NewStyle().Foreground(t.P.Accent).Background(t.P.Bg).Bold(true).Render("event stream") +
-		t.span("   ", t.P.Bg)
+		t.span("   ", t.P.Bg) + m.eventStreamBadge()
-	if m.connected {
-		header += lipgloss.NewStyle().Foreground(t.P.OK).Background(t.P.Bg).Render("● live")
-	} else {
-		header += t.span("○ idle", t.P.Faint)
-	}
 
 	s := m.session(m.selectedID)
 	if s == nil || len(s.Events) == 0 {
@@ -617,6 +612,30 @@ func (m Model) eventRows(w, h int) []string {
 	return append([]string{header, ""}, evRows...)
 }
 
+// eventStreamBadge reflects whether the *selected session's* stream is still live, not
+// just whether the socket is connected: a completed / failed / paused session emits no
+// more events, so the old connection-only "● live" went stale the moment a session ended.
+func (m Model) eventStreamBadge() string {
+	t := m.theme
+	if !m.connected {
+		return t.span("○ idle", t.P.Faint)
+	}
+	if s := m.session(m.selectedID); s != nil {
+		badge := func(fg lipgloss.Color, text string) string {
+			return lipgloss.NewStyle().Foreground(fg).Background(t.P.Bg).Render(text)
+		}
+		switch u := strings.ToUpper(s.Status); {
+		case strings.Contains(u, "FAIL"):
+			return badge(t.P.Bad, "✗ failed")
+		case strings.Contains(u, "COMPLETE"):
+			return badge(t.P.OK, "✓ done")
+		case strings.Contains(u, "PAUSE"):
+			return badge(t.P.Warn, "‖ paused")
+		}
+	}
+	return lipgloss.NewStyle().Foreground(t.P.OK).Background(t.P.Bg).Render("● live")
+}
+
 // --- width helpers ---
 
 // shortPath abbreviates the user's home dir to ~ for a compact cwd in the status bar.