feat(ui): improve mobile responsive layouts

web/default/src/lib/time.ts

@@ -65,6 +65,20 @@ export function getNormalizedDateRange(
   }
 }
 
+/**
+ * Calculate a rolling date range ending at the current moment.
+ * Example: 1 day means the last 24 hours, not yesterday 00:00 to today 23:59.
+ */
+export function getRollingDateRange(
+  days: number,
+  fromDate: Date = new Date()
+): { start: Date; end: Date } {
+  const end = new Date(fromDate)
+  const start = new Date(end.getTime() - days * 24 * 60 * 60 * 1000)
+
+  return { start, end }
+}
+
 /**
  * Compute time range as Unix timestamps (seconds)
  * @param days Default number of days if no dates provided