feat(frontend): redesign race dashboard

frontend/src/components/DatePickerField.tsx

@@ -0,0 +1,197 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { buildMonthCells, toYmd, WEEKDAY_LABELS_SHORT_RU } from "../lib";
+
+const MONTH_NAMES_RU = [
+  "Январь",
+  "Февраль",
+  "Март",
+  "Апрель",
+  "Май",
+  "Июнь",
+  "Июль",
+  "Август",
+  "Сентябрь",
+  "Октябрь",
+  "Ноябрь",
+  "Декабрь",
+];
+
+interface DatePickerFieldProps {
+  value: string;
+  name: string;
+  required?: boolean;
+  onChange: (value: string) => void;
+}
+
+function parseYmd(value: string): { year: number; monthIndex: number; day: number } | null {
+  if (!/^\d{4}-\d{2}-\d{2}$/.test(value)) {
+    return null;
+  }
+
+  const year = Number(value.slice(0, 4));
+  const monthIndex = Number(value.slice(5, 7)) - 1;
+  const day = Number(value.slice(8, 10));
+
+  if (!Number.isInteger(year) || !Number.isInteger(monthIndex) || !Number.isInteger(day)) {
+    return null;
+  }
+  if (monthIndex < 0 || monthIndex > 11) {
+    return null;
+  }
+
+  return { year, monthIndex, day };
+}
+
+function getInitialVisibleMonth(value: string): { year: number; monthIndex: number } {
+  const parsed = parseYmd(value);
+  if (parsed) {
+    return { year: parsed.year, monthIndex: parsed.monthIndex };
+  }
+
+  const now = new Date();
+  return { year: now.getFullYear(), monthIndex: now.getMonth() };
+}
+
+export function DatePickerField(props: DatePickerFieldProps): JSX.Element {
+  const { value, name, required, onChange } = props;
+  const [isOpen, setIsOpen] = useState(false);
+  const [visibleMonth, setVisibleMonth] = useState(() => getInitialVisibleMonth(value));
+  const rootRef = useRef<HTMLDivElement | null>(null);
+
+  useEffect(() => {
+    const parsed = parseYmd(value);
+    if (!parsed) {
+      return;
+    }
+    setVisibleMonth({ year: parsed.year, monthIndex: parsed.monthIndex });
+  }, [value]);
+
+  useEffect(() => {
+    if (!isOpen) {
+      return;
+    }
+
+    function handlePointerDown(event: MouseEvent): void {
+      if (rootRef.current?.contains(event.target as Node)) {
+        return;
+      }
+      setIsOpen(false);
+    }
+
+    function handleKeyDown(event: KeyboardEvent): void {
+      if (event.key === "Escape") {
+        setIsOpen(false);
+      }
+    }
+
+    document.addEventListener("mousedown", handlePointerDown);
+    document.addEventListener("keydown", handleKeyDown);
+    return () => {
+      document.removeEventListener("mousedown", handlePointerDown);
+      document.removeEventListener("keydown", handleKeyDown);
+    };
+  }, [isOpen]);
+
+  const selected = parseYmd(value);
+  const todayYmd = toYmd(new Date().getFullYear(), new Date().getMonth(), new Date().getDate());
+  const cells = useMemo(
+    () => buildMonthCells(visibleMonth.year, visibleMonth.monthIndex),
+    [visibleMonth],
+  );
+  const monthTitle = `${MONTH_NAMES_RU[visibleMonth.monthIndex]} ${visibleMonth.year}`;
+
+  function shiftMonth(delta: number): void {
+    setVisibleMonth((prev) => {
+      const next = new Date(Date.UTC(prev.year, prev.monthIndex + delta, 1));
+      return { year: next.getUTCFullYear(), monthIndex: next.getUTCMonth() };
+    });
+  }
+
+  return (
+    <div className="date-picker" ref={rootRef}>
+      <div className="date-picker__control">
+        <input
+          className="race-form__input date-picker__input"
+          type="text"
+          inputMode="numeric"
+          name={name}
+          value={value}
+          onChange={(event) => {
+            onChange(event.target.value);
+          }}
+          onFocus={() => setIsOpen(true)}
+          placeholder="2026-05-03"
+          autoComplete="off"
+          required={required}
+        />
+        <button
+          className="date-picker__toggle"
+          type="button"
+          aria-label="Открыть календарь"
+          aria-expanded={isOpen}
+          onClick={() => setIsOpen((prev) => !prev)}
+        >
+          ▾
+        </button>
+      </div>
+
+      {isOpen ? (
+        <div className="date-picker__popover" role="dialog" aria-label="Выбор даты">
+          <div className="date-picker__header">
+            <button
+              className="date-picker__nav"
+              type="button"
+              aria-label="Предыдущий месяц"
+              onClick={() => shiftMonth(-1)}
+            >
+              ‹
+            </button>
+            <p className="date-picker__title">{monthTitle}</p>
+            <button
+              className="date-picker__nav"
+              type="button"
+              aria-label="Следующий месяц"
+              onClick={() => shiftMonth(1)}
+            >
+              ›
+            </button>
+          </div>
+          <div className="date-picker__weekdays" aria-hidden>
+            {WEEKDAY_LABELS_SHORT_RU.map((weekday) => (
+              <span key={weekday} className="date-picker__weekday">
+                {weekday}
+              </span>
+            ))}
+          </div>
+          <div className="date-picker__cells">
+            {cells.map((day, idx) => {
+              if (day === null) {
+                return <span key={`empty-${idx}`} className="date-picker__cell date-picker__cell--empty" />;
+              }
+
+              const ymd = toYmd(visibleMonth.year, visibleMonth.monthIndex, day);
+              const isSelected =
+                selected?.year === visibleMonth.year &&
+                selected.monthIndex === visibleMonth.monthIndex &&
+                selected.day === day;
+
+              return (
+                <button
+                  key={ymd}
+                  className={`date-picker__day${isSelected ? " date-picker__day--selected" : ""}${ymd === todayYmd ? " date-picker__day--today" : ""}`}
+                  type="button"
+                  onClick={() => {
+                    onChange(ymd);
+                    setIsOpen(false);
+                  }}
+                >
+                  {day}
+                </button>
+              );
+            })}
+          </div>
+        </div>
+      ) : null}
+    </div>
+  );
+}