feat(frontend): redesign race dashboard

frontend/src/components/PaceTrendChart.tsx

@@ -55,16 +55,38 @@ export function PaceTrendChart(props: PaceTrendChartProps): JSX.Element {
     .join(" ");
 
   const last = series[series.length - 1]!;
+  const best = series.reduce((currentBest, item) => (item.minutes < currentBest.minutes ? item : currentBest), series[0]!);
+  const dotPoints = series.map((s, i) => {
+    const x = pad + (n === 1 ? innerW / 2 : (i / (n - 1)) * innerW);
+    const norm = (maxM - s.minutes) / range;
+    const y = pad + (1 - norm) * innerH;
+    return { x, y, id: s.race.id };
+  });
 
   return (
     <div className="pace-chart">
       <svg className="pace-chart__svg" viewBox={`0 0 ${w} ${h}`} role="img" aria-label="Динамика времени на дистанции">
+        <line className="pace-chart__grid-line" x1={pad} y1={pad} x2={w - pad} y2={pad} />
+        <line className="pace-chart__grid-line" x1={pad} y1={h - pad} x2={w - pad} y2={h - pad} />
         <polyline className="pace-chart__line" fill="none" points={points} />
+        {dotPoints.map((point, index) => (
+          <circle
+            key={point.id}
+            className={index === dotPoints.length - 1 ? "pace-chart__dot pace-chart__dot--last" : "pace-chart__dot"}
+            cx={point.x}
+            cy={point.y}
+            r="1.6"
+          />
+        ))}
       </svg>
-      <p className="pace-chart__caption">
-        Последний пункт: {formatRaceDate(last.race.date)} — {last.race.finishTime} (
-        {last.minutes.toFixed(1)} мин)
-      </p>
+      <div className="pace-chart__stats">
+        <p className="pace-chart__caption">
+          Последний: {formatRaceDate(last.race.date)} · {last.race.finishTime} · {last.minutes.toFixed(1)} мин
+        </p>
+        <p className="pace-chart__caption pace-chart__caption--best">
+          Лучший: {formatRaceDate(best.race.date)} · {best.race.finishTime} · {best.minutes.toFixed(1)} мин
+        </p>
+      </div>
     </div>
   );
 }