feat(frontend): add dashboard and race calendar views

Implement dashboard metrics and split race lists with BEM-styled cards using the typed races API.

Made-with: Cursor

frontend/src/pages/RacesPage.tsx

@@ -1,8 +1,113 @@
-export function RacesPage(): JSX.Element {
+import { useEffect, useMemo, useState } from "react";
+import type { Race } from "../api";
+import { ApiError, getRaces } from "../api";
+import { formatDistance, formatRaceDate, getRaceStatusLabel, splitRacesByDate } from "../lib";
+
+function getErrorMessage(error: unknown): string {
+  if (error instanceof ApiError) {
+    return error.message;
+  }
+  return "Не удалось загрузить календарь стартов.";
+}
+
+function RaceList(props: { title: string; races: Race[] }): JSX.Element {
+  const { title, races } = props;
+
   return (
-    <section className="page page--races">
-      <h1 className="page__title">Races</h1>
-      <p className="page__subtitle">Upcoming and completed race lists will be added in the next task.</p>
+    <section className="race-list" aria-label={title}>
+      <h2 className="race-list__title">{title}</h2>
+      {races.length > 0 ? (
+        <ul className="race-list__items">
+          {races.map((race) => (
+            <li key={race.id} className="race-card">
+              <div className="race-card__main">
+                <p className="race-card__title">{race.title}</p>
+                <p className="race-card__meta">
+                  {formatRaceDate(race.date)} · {formatDistance(race.distanceKm)}
+                </p>
+              </div>
+              <span
+                className={
+                  race.status === "completed"
+                    ? "race-card__status race-card__status--completed"
+                    : "race-card__status race-card__status--planned"
+                }
+              >
+                {getRaceStatusLabel(race.status)}
+              </span>
+            </li>
+          ))}
+        </ul>
+      ) : (
+        <p className="race-list__empty">Пока нет данных в этом разделе.</p>
+      )}
+    </section>
+  );
+}
+
+export function RacesPage(): JSX.Element {
+  const [races, setRaces] = useState<Race[]>([]);
+  const [isLoading, setIsLoading] = useState<boolean>(true);
+  const [errorMessage, setErrorMessage] = useState<string | null>(null);
+
+  useEffect(() => {
+    let isMounted = true;
+
+    async function loadRaces(): Promise<void> {
+      try {
+        const items = await getRaces();
+        if (!isMounted) {
+          return;
+        }
+        setRaces(items);
+        setErrorMessage(null);
+      } catch (error) {
+        if (!isMounted) {
+          return;
+        }
+        setErrorMessage(getErrorMessage(error));
+      } finally {
+        if (isMounted) {
+          setIsLoading(false);
+        }
+      }
+    }
+
+    void loadRaces();
+    return () => {
+      isMounted = false;
+    };
+  }, []);
+
+  const { upcoming, past } = useMemo(() => splitRacesByDate(races), [races]);
+
+  if (isLoading) {
+    return (
+      <section className="page page--races" aria-busy="true">
+        <h1 className="page__title">Календарь стартов</h1>
+        <p className="page__subtitle">Загружаем данные...</p>
+      </section>
+    );
+  }
+
+  if (errorMessage) {
+    return (
+      <section className="page page--races" role="alert">
+        <h1 className="page__title">Календарь стартов</h1>
+        <p className="page__subtitle page__subtitle--error">{errorMessage}</p>
+      </section>
+    );
+  }
+
+  return (
+    <section className="page page--races">
+      <h1 className="page__title">Календарь стартов</h1>
+      <p className="page__subtitle">Будущие и прошедшие старты в одном месте.</p>
+
+      <div className="race-lists">
+        <RaceList title="Будущие" races={upcoming} />
+        <RaceList title="Прошедшие" races={past} />
+      </div>
     </section>
   );
 }