fix: improve the UI

src/client/components/StatusHistoryBar.tsx

@@ -2,6 +2,8 @@ import type { PublicService } from "../api/status";
 
 const DAY_MS = 24 * 60 * 60 * 1000;
 const HISTORY_DAYS = 90;
+const DAYS_PER_SEGMENT = 2;
+const HISTORY_SEGMENTS = HISTORY_DAYS / DAYS_PER_SEGMENT;
 
 type HistoryEntry = PublicService["history"][number];
 
@@ -12,41 +14,52 @@ function dayClass(uptimePct: number | null) {
 	return "is-partial";
 }
 
-function dayTitle(day: number, uptimePct: number | null) {
-	const date = new Intl.DateTimeFormat("en", {
+function formatDay(day: number) {
+	return new Intl.DateTimeFormat("en", {
 		month: "short",
 		day: "numeric",
 		year: "numeric",
 		timeZone: "UTC",
 	}).format(new Date(day));
-	return `${date}: ${uptimePct === null ? "No data" : `${uptimePct.toFixed(1)}% uptime`}`;
+}
+
+function segmentTitle(startDay: number, endDay: number, uptimePct: number | null) {
+	const dateRange = `${formatDay(startDay)} – ${formatDay(endDay)}`;
+	return `${dateRange}: ${uptimePct === null ? "No data" : `${uptimePct.toFixed(1)}% uptime`}`;
 }
 
 export function StatusHistoryBar({ history }: { history: HistoryEntry[] }) {
 	const historyByDay = new Map(history.map((entry) => [entry.day, entry.uptimePct]));
 	const now = new Date();
 	const today = Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate());
-	const days = Array.from({ length: HISTORY_DAYS }, (_, index) => {
-		const day = today - (HISTORY_DAYS - index - 1) * DAY_MS;
-		return { day, uptimePct: historyByDay.get(day) ?? null };
+	const segments = Array.from({ length: HISTORY_SEGMENTS }, (_, index) => {
+		const startDay = today - (HISTORY_DAYS - index * DAYS_PER_SEGMENT - 1) * DAY_MS;
+		const endDay = startDay + (DAYS_PER_SEGMENT - 1) * DAY_MS;
+		const values = Array.from({ length: DAYS_PER_SEGMENT }, (_, dayIndex) =>
+			historyByDay.get(startDay + dayIndex * DAY_MS),
+		).filter((value): value is number => value !== undefined && value !== null);
+		const uptimePct = values.length === 0
+			? null
+			: Math.round((values.reduce((sum, value) => sum + value, 0) / values.length) * 10) / 10;
+		return { startDay, endDay, uptimePct };
 	});
 
 	return (
 		<div className="status-history">
-		<div className="uptime-days" aria-label="Daily uptime over the last 90 days">
-			{days.map(({ day, uptimePct }) => (
-				<span
-					className={`uptime-day ${dayClass(uptimePct)}`}
-					key={day}
-					title={dayTitle(day, uptimePct)}
-				/>
-			))}
-		</div>
-		<div className="uptime-days-caption" aria-hidden="true">
-			<span>90 days ago</span>
-			<i />
-			<span>Today</span>
-		</div>
+			<div className="uptime-days" aria-label="90-day uptime shown in 45 two-day segments">
+				{segments.map(({ startDay, endDay, uptimePct }) => (
+					<span
+						className={`uptime-day ${dayClass(uptimePct)}`}
+						key={startDay}
+						title={segmentTitle(startDay, endDay, uptimePct)}
+					/>
+				))}
+			</div>
+			<div className="uptime-days-caption" aria-hidden="true">
+				<span>90 days ago</span>
+				<i />
+				<span>Today</span>
+			</div>
 		</div>
 	);
 }

src/client/styles.css

@@ -404,6 +404,8 @@ button { color: inherit; }
 	.auth-card { padding: 28px 22px; }
 	.auth-heading h1 { font-size: 27px; }
 	.dashboard-header-inner { height: 62px; }
+	.status-header-action { min-height: 36px; padding: 6px 14px; }
+	.public-services-heading .icon-button { flex: 0 0 44px; width: 44px; height: 44px; }
 	.dashboard-main { padding-top: 32px; }
 	.dashboard-intro > div > p:last-child { font-size: 14px; line-height: 1.5; }
 	.panel-heading { min-height: 70px; padding: 14px 16px; }