fix(insights): bound the mood time-of-day chart height

The "mood by time of day" card spans the full overview width, unlike its
distribution/weekday siblings which sit in a two-column grid. Sizing the
chart wrapper with aspect-[3/2] derived the height off the full card width,
so on a wide viewport the chart ballooned to roughly 800px tall and
overflowed its card. Swap the aspect ratio for a fixed bounded height so the
chart fits the card at the same size as the width-constrained sibling charts
regardless of viewport. Chart internals and tokens are unchanged.

src/components/insights/mood/mood-time-of-day-chart.tsx

@@ -77,7 +77,12 @@ export function MoodTimeOfDayChart({
 
   return (
     <div className="space-y-2">
-      <div className="aspect-[3/2] min-h-[160px] w-full">
+      {/* A fixed height, not `aspect-[3/2]`: this card spans the full overview
+          width (its weekday/distribution siblings sit in a 2-col grid and are
+          width-constrained), so an aspect ratio derived the height off the full
+          card width and ballooned the chart to ~800px on a wide viewport. A
+          bounded height keeps it the same size as the sibling charts. */}
+      <div className="h-[220px] w-full">
         <ResponsiveContainer width="100%" height="100%">
           <BarChart
             data={data}