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/lib/raceMetrics.ts

@@ -0,0 +1,110 @@
+import type { Race } from "../api";
+
+const MS_IN_DAY = 24 * 60 * 60 * 1000;
+
+function parseRaceDate(date: string): Date {
+  return new Date(`${date}T00:00:00`);
+}
+
+export function parseFinishTimeToSeconds(value: string | null): number | null {
+  if (!value) {
+    return null;
+  }
+
+  const parts = value.split(":").map((part) => Number(part));
+  if (parts.some((part) => Number.isNaN(part) || part < 0)) {
+    return null;
+  }
+
+  if (parts.length === 2) {
+    const [minutes, seconds] = parts;
+    return minutes * 60 + seconds;
+  }
+
+  if (parts.length === 3) {
+    const [hours, minutes, seconds] = parts;
+    return hours * 3600 + minutes * 60 + seconds;
+  }
+
+  return null;
+}
+
+export function formatDistance(distanceKm: number): string {
+  return `${distanceKm.toLocaleString("ru-RU", { maximumFractionDigits: 1 })} км`;
+}
+
+export function formatRaceDate(date: string): string {
+  return parseRaceDate(date).toLocaleDateString("ru-RU", {
+    day: "2-digit",
+    month: "long",
+    year: "numeric",
+  });
+}
+
+export function sortByDateAsc(races: Race[]): Race[] {
+  return [...races].sort((left, right) => parseRaceDate(left.date).getTime() - parseRaceDate(right.date).getTime());
+}
+
+export function sortByDateDesc(races: Race[]): Race[] {
+  return [...races].sort((left, right) => parseRaceDate(right.date).getTime() - parseRaceDate(left.date).getTime());
+}
+
+export function splitRacesByDate(races: Race[], now: Date = new Date()): { upcoming: Race[]; past: Race[] } {
+  const today = new Date(now);
+  today.setHours(0, 0, 0, 0);
+
+  const upcoming: Race[] = [];
+  const past: Race[] = [];
+
+  for (const race of races) {
+    if (parseRaceDate(race.date).getTime() >= today.getTime()) {
+      upcoming.push(race);
+    } else {
+      past.push(race);
+    }
+  }
+
+  return {
+    upcoming: sortByDateAsc(upcoming),
+    past: sortByDateDesc(past),
+  };
+}
+
+export function getRaceCountdownLabel(date: string, now: Date = new Date()): string {
+  const today = new Date(now);
+  today.setHours(0, 0, 0, 0);
+
+  const target = parseRaceDate(date);
+  const days = Math.ceil((target.getTime() - today.getTime()) / MS_IN_DAY);
+
+  if (days <= 0) {
+    return "сегодня";
+  }
+  if (days === 1) {
+    return "через 1 день";
+  }
+  if (days < 5) {
+    return `через ${days} дня`;
+  }
+  return `через ${days} дней`;
+}
+
+export function getPaceLabel(finishTime: string | null, distanceKm: number): string | null {
+  const totalSeconds = parseFinishTimeToSeconds(finishTime);
+  if (!totalSeconds || distanceKm <= 0) {
+    return null;
+  }
+
+  const paceSeconds = Math.round(totalSeconds / distanceKm);
+  const paceMinutes = Math.floor(paceSeconds / 60);
+  const paceRemainder = paceSeconds % 60;
+
+  return `${String(paceMinutes).padStart(2, "0")}:${String(paceRemainder).padStart(2, "0")} /км`;
+}
+
+export function getRaceStatusLabel(status: Race["status"]): string {
+  if (status === "completed") {
+    return "пробежал";
+  }
+  return "планирую";
+}