fix(tui): sparkline right-aligned — current time at right edge, dots fill left

internal/tui/tab_sites.go

@@ -61,6 +61,9 @@ func latencySparkline(latencies []time.Duration, width int) string {
 	}
 
 	var sb strings.Builder
+	if remaining := width - len(samples); remaining > 0 {
+		sb.WriteString(subtleStyle.Render(strings.Repeat("·", remaining)))
+	}
 	spread := maxL - minL
 	for _, l := range samples {
 		idx := 0
@@ -80,10 +83,6 @@ func latencySparkline(latencies []time.Duration, width int) string {
 			sb.WriteString(dangerStyle.Render(ch))
 		}
 	}
-
-	if remaining := width - len(samples); remaining > 0 {
-		sb.WriteString(subtleStyle.Render(strings.Repeat("·", remaining)))
-	}
 	return sb.String()
 }
 
@@ -98,6 +97,9 @@ func heartbeatSparkline(statuses []bool, width int) string {
 	}
 
 	var sb strings.Builder
+	if remaining := width - len(samples); remaining > 0 {
+		sb.WriteString(subtleStyle.Render(strings.Repeat("·", remaining)))
+	}
 	for _, up := range samples {
 		if up {
 			sb.WriteString(specialStyle.Render("▁"))
@@ -105,10 +107,6 @@ func heartbeatSparkline(statuses []bool, width int) string {
 			sb.WriteString(dangerStyle.Render("█"))
 		}
 	}
-
-	if remaining := width - len(samples); remaining > 0 {
-		sb.WriteString(subtleStyle.Render(strings.Repeat("·", remaining)))
-	}
 	return sb.String()
 }