§4.1.24.1/.2: filter label hidden on mobile; date locked until departure set

- Hide `.flights-map-filter-header` on mobile via `@include screen.mobile`
  so the "Найдите свой маршрут" label is absent on phone (R7).
- Disable the PrimeReact Calendar and DayQuickPick when `Город вылета` is
  empty; date picker must not be selectable without a departure city (R16).
- Add `disabled?` prop to DayQuickPick so callers can block the quick-day
  buttons on mobile (R16 mobile quick-day parity).

src/features/flights-map/components/FlightsMapFilter.tsx

@@ -289,10 +289,14 @@ export const FlightsMapFilter: FC<FlightsMapFilterProps> = ({
 
       <div className="flights-map-filter__field">
         <label htmlFor="fm-date">{t("SHARED.FLIGHT_DATE")}</label>
+        {/* TZ §4.1.24.2 Table 69 R16: calendar days must not be selectable
+            until Город вылета is filled. Pass `disabled` to both the quick-
+            pick shortcuts and the full calendar picker. */}
         <DayQuickPick
           value={value.date ? yyyymmddToDate(value.date) : null}
           locale={language}
           onChange={handleDateChange}
+          disabled={!value.departure}
         />
         <Calendar
           value={value.date ? yyyymmddToDate(value.date) : null}
@@ -303,6 +307,7 @@ export const FlightsMapFilter: FC<FlightsMapFilterProps> = ({
           dateFormat="dd.mm.yy"
           placeholder={t("SHARED.DATE_FORMAT")}
           showIcon
+          disabled={!value.departure}
           className="input--filter"
           inputId="fm-date"
           data-testid="fm-date-input"

src/features/flights-map/components/FlightsMapStartPage.scss

@@ -177,6 +177,12 @@
     h3 {
       margin: 0;
     }
+
+    // TZ §4.1.24.2 R7: mobile version must not show the filter label
+    // "Найдите свой маршрут". Desktop/tablet retain it.
+    @include screen.mobile {
+      display: none;
+    }
   }
 
   &__field {

src/ui/calendar/DayQuickPick.tsx

@@ -10,6 +10,11 @@ export interface DayQuickPickProps {
   count?: number;
   /** Called with the chosen Date on click. */
   onChange: (date: Date) => void;
+  /**
+   * When true, all quick-pick buttons are disabled and non-interactive.
+   * TZ §4.1.24.2 R16: days must not be selectable until Город вылета is set.
+   */
+  disabled?: boolean;
 }
 
 function addDays(base: Date, n: number): Date {
@@ -40,6 +45,7 @@ export const DayQuickPick: FC<DayQuickPickProps> = ({
   locale,
   count = 3,
   onChange,
+  disabled = false,
 }) => {
   const today = new Date();
   today.setHours(0, 0, 0, 0);
@@ -69,8 +75,9 @@ export const DayQuickPick: FC<DayQuickPickProps> = ({
           <button
             key={i}
             type="button"
-            className={`day-quick-pick__btn${selected ? " day-quick-pick__btn--selected" : ""}`}
+            className={`day-quick-pick__btn${selected ? " day-quick-pick__btn--selected" : ""}${disabled ? " day-quick-pick__btn--disabled" : ""}`}
             aria-pressed={selected}
+            disabled={disabled}
             onClick={() => onChange(d)}
             data-testid={`day-quick-pick-${i}`}
           >