feat(frontend): race form, start time selects, calendar views, day page

- Hide org schedule fields when editing a past race; isRaceDateInPast helper
- StartTimeSelects (HH:mm:ss) and optional ?date= prefill on new race
- Full-card link to edit for races needing result entry; shadow token
- List/calendar toggle (sessionStorage); year grid and month focus views
- Date hover popover and /races/day/:ymd page with Add button
- Docs plan-korrektirovok-starty.md and startTime API note; client 0.4.0

Made-with: Cursor

frontend/src/pages/RaceFormPage.tsx

@@ -1,7 +1,9 @@
 import { useCallback, useEffect, useState } from "react";
-import { Link, useNavigate, useParams } from "react-router-dom";
+import { Link, useNavigate, useParams, useSearchParams } from "react-router-dom";
 import { ApiError, createRace, getRaceById, updateRace } from "../api";
 import type { CreateRacePayload, Race, RaceStatus, UpdateRacePayload } from "../api";
+import { StartTimeSelects } from "../components/StartTimeSelects";
+import { isRaceDateInPast } from "../lib";
 
 function slugify(text: string): string {
   return text
@@ -94,6 +96,7 @@ function validateForm(form: FormData): string[] {
 export function RaceFormPage(): JSX.Element {
   const { raceId } = useParams<{ raceId: string }>();
   const navigate = useNavigate();
+  const [searchParams] = useSearchParams();
   const isEditMode = Boolean(raceId);
 
   const [form, setForm] = useState<FormData>(EMPTY_FORM);
@@ -135,6 +138,16 @@ export function RaceFormPage(): JSX.Element {
     };
   }, [raceId]);
 
+  useEffect(() => {
+    if (isEditMode) {
+      return;
+    }
+    const d = searchParams.get("date");
+    if (d && /^\d{4}-\d{2}-\d{2}$/.test(d)) {
+      setForm((prev) => (prev.date === d ? prev : { ...prev, date: d }));
+    }
+  }, [isEditMode, searchParams]);
+
   const handleChange = useCallback(
     (event: React.ChangeEvent<HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement>) => {
       const { name, value } = event.target;
@@ -214,6 +227,7 @@ export function RaceFormPage(): JSX.Element {
     [form, isEditMode, raceId, navigate],
   );
 
+  const hideOrgScheduleFields = isEditMode && isRaceDateInPast(form.date);
   const pageTitle = isEditMode ? "Редактирование старта" : "Новый старт";
 
   if (isLoading) {
@@ -303,51 +317,57 @@ export function RaceFormPage(): JSX.Element {
         <fieldset className="race-form__group">
           <legend className="race-form__legend">Организация</legend>
 
-          <label className="race-form__field">
-            <span className="race-form__label">Сайт организатора</span>
-            <input
-              className="race-form__input"
-              type="url"
-              name="officialUrl"
-              value={form.officialUrl}
-              onChange={handleChange}
-              placeholder="https://…"
-            />
-          </label>
+          {hideOrgScheduleFields ? null : (
+            <label className="race-form__field">
+              <span className="race-form__label">Сайт организатора</span>
+              <input
+                className="race-form__input"
+                type="url"
+                name="officialUrl"
+                value={form.officialUrl}
+                onChange={handleChange}
+                placeholder="https://…"
+              />
+            </label>
+          )}
 
-          <label className="race-form__field">
-            <span className="race-form__label">Время старта</span>
-            <input
-              className="race-form__input"
-              type="text"
-              name="startTime"
-              value={form.startTime}
-              onChange={handleChange}
-              placeholder="09:30"
-            />
-          </label>
+          {hideOrgScheduleFields ? null : (
+            <div className="race-form__field">
+              <span className="race-form__label">Время старта</span>
+              <StartTimeSelects
+                value={form.startTime}
+                onChange={(next) => {
+                  setForm((prev) => ({ ...prev, startTime: next }));
+                }}
+              />
+            </div>
+          )}
 
-          <label className="race-form__field">
-            <span className="race-form__label">Расписание кластеров</span>
-            <input
-              className="race-form__input"
-              type="text"
-              name="clusterSchedule"
-              value={form.clusterSchedule}
-              onChange={handleChange}
-            />
-          </label>
+          {hideOrgScheduleFields ? null : (
+            <label className="race-form__field">
+              <span className="race-form__label">Расписание кластеров</span>
+              <input
+                className="race-form__input"
+                type="text"
+                name="clusterSchedule"
+                value={form.clusterSchedule}
+                onChange={handleChange}
+              />
+            </label>
+          )}
 
-          <label className="race-form__field">
-            <span className="race-form__label">Выдача номеров</span>
-            <input
-              className="race-form__input"
-              type="text"
-              name="bibPickup"
-              value={form.bibPickup}
-              onChange={handleChange}
-            />
-          </label>
+          {hideOrgScheduleFields ? null : (
+            <label className="race-form__field">
+              <span className="race-form__label">Выдача номеров</span>
+              <input
+                className="race-form__input"
+                type="text"
+                name="bibPickup"
+                value={form.bibPickup}
+                onChange={handleChange}
+              />
+            </label>
+          )}
 
           <label className="race-form__field">
             <span className="race-form__label">Стартовый номер</span>