feat: unify chart range controls

frontend/src/widgets/QbittorrentSpeedWidget.tsx

@@ -1,6 +1,7 @@
 import { Alert, AlertDescription } from "@/components/ui/alert";
 import { Skeleton } from "@/components/ui/skeleton";
 import { LineSeriesChart } from "../components/LineSeriesChart";
+import { chartRangesThrough } from "../components/chartRanges";
 import type { ChartSeries } from "../components/LineSeriesChart";
 import type { MetricScale, MetricUnit } from "../lib/metricFormat";
 import { SectionCard } from "../components/SectionCard";
@@ -23,6 +24,7 @@ export function QbittorrentSpeedWidget({
 	// Source returns raw bytes/sec; default to bytes/sec + auto scale (MB/s, …).
 	const unit = (widget.config.unit as MetricUnit) || "bytes_per_sec";
 	const scale = (widget.config.scale as MetricScale) || "auto";
+	const maxRangeSeconds = Number(widget.config.window_seconds) || 1800;
 
 	return (
 		<SectionCard title={widget.title} description={description}>
@@ -38,6 +40,8 @@ export function QbittorrentSpeedWidget({
 					unit={unit}
 					scale={scale}
 					height={220}
+					rangeOptions={chartRangesThrough(maxRangeSeconds)}
+					defaultRangeSeconds={maxRangeSeconds}
 				/>
 			) : (
 				<Alert>