fix: an asleep browser Lane is not a stalled one on the admin page (#110)

Co-authored-by: Sulthan Zaki <sultankiki05@gmail.com>
Co-committed-by: Sulthan Zaki <sultankiki05@gmail.com>

backend/internal/web/admin.go

@@ -61,8 +61,11 @@ type laneRow struct {
 	// is configured, which stops those Series just as completely.
 	BrowserLost bool
 	// Stalled marks a Lane with Series waiting that its last pass did not read
-	// — the difference between a stopped Lane and a quiet one (story 13).
+	// — the difference between a stopped Lane and a quiet one (story 13). A
+	// browser Lane holding Chrome asleep under the wake thresholds is neither,
+	// so it carries Asleep instead and never Stalled.
 	Stalled bool
+	Asleep  bool
 	// Attention is the one flag the template colours on, so an unhealthy Lane
 	// is found at a glance rather than read for.
 	Attention bool
@@ -152,8 +155,9 @@ func (h *Handler) lanesView() lanesView {
 	for _, l := range snap.Lanes {
 		lost := l.Browser && !snap.BrowserReachable
 		// Series waiting and none read is the shape of a Lane that has stopped
-		// working, as distinct from one that is quiet for want of work.
-		stalled := l.Due > 0 && l.Checked == 0
+		// working, as distinct from one that is quiet for want of work — or one
+		// deliberately leaving Chrome asleep until its group gathers.
+		stalled := l.Due > 0 && l.Checked == 0 && !l.Asleep
 		gap := ""
 		if l.Gap > 0 {
 			gap = l.Gap.Truncate(time.Second).String()
@@ -168,6 +172,7 @@ func (h *Handler) lanesView() lanesView {
 			Refusing:    l.Refusing,
 			BrowserLost: lost,
 			Stalled:     stalled,
+			Asleep:      l.Asleep,
 			Attention:   l.Clamped || l.Refusing || lost || stalled,
 		})
 	}