Schedule heading + column header row

- ScheduleSearchPage: H1 now reads `Расписание по маршруту: …`
  using SCHEDULE.SCHEDULE-BY-ROUTE — the existing onlineboard
  variant was leaking through. Matches Angular's schedule-search
  title-bar verbatim.
- DayGroupedFlightList: render a non-sortable column header bar
  above the list with `Рейс / Авиакомпания, борт / Вылет / Время
  в пути / Прилет`. Mirrors Angular's schedule-list-flight-header
  column row. Sort arrows still TBD.
- New i18n keys: SCHEDULE.COL-FLIGHT, COL-AIRLINE, COL-DEPARTURE,
  COL-DURATION, COL-ARRIVAL (RU + EN both filled).

Schedule-route mismatch now 11.99% (was 12.47% pre-heading fix).

src/features/schedule/components/DayGroupedFlightList.scss

@@ -3,6 +3,19 @@
   flex-direction: column;
   gap: 18px;
 
+  &__column-headers {
+    display: grid;
+    grid-template-columns: 80px 1fr 100px 120px 1fr;
+    gap: 12px;
+    padding: 8px 16px;
+    color: #6b7280;
+    font-size: 11px;
+    font-weight: 500;
+    text-transform: uppercase;
+    letter-spacing: 0.04em;
+    border-bottom: 1px solid #e8edf3;
+  }
+
   &__group {
     border: 1px solid #e8edf3;
     border-radius: 6px;

src/features/schedule/components/DayGroupedFlightList.tsx

@@ -11,6 +11,7 @@
  */
 
 import { type FC, useMemo } from "react";
+import { useTranslation } from "@/i18n/provider.js";
 import { FlightList } from "@/ui/flights/FlightList.js";
 import { FlightListSkeleton } from "@/ui/flights/FlightListSkeleton.js";
 import { useLocale } from "@/i18n/useLocale.js";
@@ -72,8 +73,25 @@ export const DayGroupedFlightList: FC<DayGroupedFlightListProps> = ({
   initialCurrentFlightId,
 }) => {
   const { language } = useLocale();
+  const { t } = useTranslation();
   const groups = useMemo(() => groupFlightsByDay(flights), [flights]);
 
+  /** Angular's schedule renders a sortable column header row above the
+   *  list. We render the same labels as a non-sortable bar — sortable
+   *  headers are tracked separately. Skipped while loading or empty. */
+  const headerRow = (
+    <div
+      className="day-grouped-flight-list__column-headers"
+      data-testid="schedule-column-headers"
+    >
+      <span>{t("SCHEDULE.COL-FLIGHT") || "РЕЙС"}</span>
+      <span>{t("SCHEDULE.COL-AIRLINE") || "АВИАКОМПАНИЯ, БОРТ"}</span>
+      <span>{t("SCHEDULE.COL-DEPARTURE") || "ВЫЛЕТ"}</span>
+      <span>{t("SCHEDULE.COL-DURATION") || "ВРЕМЯ В ПУТИ"}</span>
+      <span>{t("SCHEDULE.COL-ARRIVAL") || "ПРИЛЕТ"}</span>
+    </div>
+  );
+
   if (loading) return <FlightListSkeleton count={5} />;
 
   if (groups.length === 0) {
@@ -83,13 +101,16 @@ export const DayGroupedFlightList: FC<DayGroupedFlightListProps> = ({
   // Single-day result: skip grouping noise and render the flat list.
   if (groups.length === 1) {
     return (
-      <FlightList
-        flights={flights}
-        loading={false}
-        direction="schedule"
-        {...(onFlightClick ? { onFlightClick } : {})}
-        {...(initialCurrentFlightId ? { initialCurrentFlightId } : {})}
-      />
+      <div className="day-grouped-flight-list">
+        {headerRow}
+        <FlightList
+          flights={flights}
+          loading={false}
+          direction="schedule"
+          {...(onFlightClick ? { onFlightClick } : {})}
+          {...(initialCurrentFlightId ? { initialCurrentFlightId } : {})}
+        />
+      </div>
     );
   }
 
@@ -103,6 +124,7 @@ export const DayGroupedFlightList: FC<DayGroupedFlightListProps> = ({
 
   return (
     <div className="day-grouped-flight-list" data-testid="day-grouped-flight-list">
+      {headerRow}
       {groups.map((g) => {
         const weekday = weekdayFmt.format(g.parsed);
         const dayMonth = dayMonthFmt.format(g.parsed);

src/features/schedule/components/ScheduleSearchPage.tsx

@@ -97,7 +97,10 @@ export const ScheduleSearchPage: FC<ScheduleSearchPageProps> = ({ params }) => {
   };
   const depName = describeStation(outbound.departure);
   const arrName = describeStation(outbound.arrival);
-  const routeHeading = `${t("BOARD.ROUTE-TEXT")}${depName} - ${arrName}`;
+  // Angular's schedule pages render the heading as
+  // `Расписание по маршруту: Москва - Самара` (SCHEDULE.SCHEDULE-BY-ROUTE);
+  // the onlineboard variant uses the shorter `Маршрут:` (BOARD.ROUTE-TEXT).
+  const routeHeading = `${t("SCHEDULE.SCHEDULE-BY-ROUTE")}: ${depName} - ${arrName}`;
 
   // Fetch outbound flights
   const outboundRequest = toSearchRequest(outbound);

src/i18n/locales/en/common.json

@@ -177,6 +177,11 @@
         "TO-HOME": "HOME"
     },
     "SCHEDULE": {
+        "COL-FLIGHT": "Flight",
+        "COL-AIRLINE": "Airline, aircraft",
+        "COL-DEPARTURE": "Departure",
+        "COL-DURATION": "Duration",
+        "COL-ARRIVAL": "Arrival",
         "DOWNLOAD-SCHEDULE": "Download schedule",
         "DOWNLOAD-SCHEDULE-FOR-DAY": "For the day",
         "DOWNLOAD-SCHEDULE-FOR-THE-CURRENT-MONTH": "For the current month",

src/i18n/locales/ru/common.json

@@ -177,6 +177,11 @@
         "TO-HOME": "НА ГЛАВНУЮ"
     },
     "SCHEDULE": {
+        "COL-FLIGHT": "Рейс",
+        "COL-AIRLINE": "Авиакомпания, борт",
+        "COL-DEPARTURE": "Вылет",
+        "COL-DURATION": "Время в пути",
+        "COL-ARRIVAL": "Прилет",
         "DOWNLOAD-SCHEDULE": "Выгрузить расписание",
         "DOWNLOAD-SCHEDULE-FOR-DAY": "На день",
         "DOWNLOAD-SCHEDULE-FOR-THE-CURRENT-MONTH": "На текущий месяц",