Consolidate scattered +330/+6mo date-window literals into shared dateWindow module

src/features/flights-map/calendarRange.ts

@@ -9,6 +9,8 @@
  * Matches Angular `FlightsMapFiltersStateService` calendar behavior.
  */
 
+import { mapWindowBounds } from "@/shared/dateWindow.js";
+
 /** Today with time set to 00:00:00 local. */
 export function today(): Date {
   const d = new Date();
@@ -18,16 +20,12 @@ export function today(): Date {
 
 /** minDate = today - 1 day (Angular parity). */
 export function getMinDate(): Date {
-  const d = today();
-  d.setDate(d.getDate() - 1);
-  return d;
+  return mapWindowBounds()[0];
 }
 
 /** maxDate = today + 6 months (Angular parity). */
 export function getMaxDate(): Date {
-  const d = today();
-  d.setMonth(d.getMonth() + 6);
-  return d;
+  return mapWindowBounds()[1];
 }
 
 /**

src/features/schedule/components/ScheduleFilter.tsx

@@ -18,6 +18,7 @@ import { CityAutocomplete } from "@/ui/city-autocomplete/index.js";
 import { useDictionaries } from "@/shared/dictionaries/index.js";
 import { buildScheduleUrl } from "../url.js";
 import type { ScheduleParams } from "../url.js";
+import { scheduleWindowBounds } from "@/shared/dateWindow.js";
 import "./ScheduleFilter.scss";
 
 function minutesToTime(minutes: number): string {
@@ -74,17 +75,11 @@ function hhmmToMinutes(value: string | undefined, fallback: number): number {
 // scheduleSearchTo (330 days forward). Keeps the schedule-filter calendar
 // to the same range Angular uses via `settings.scheduleMinDate`/`Max`.
 function getScheduleMinDate(): Date {
-  const d = new Date();
-  d.setHours(0, 0, 0, 0);
-  d.setDate(d.getDate() - 1);
-  return d;
+  return scheduleWindowBounds()[0];
 }
 
 function getScheduleMaxDate(): Date {
-  const d = new Date();
-  d.setHours(0, 0, 0, 0);
-  d.setDate(d.getDate() + 330);
-  return d;
+  return scheduleWindowBounds()[1];
 }
 
 export const ScheduleFilter: FC<ScheduleFilterProps> = ({

src/features/schedule/components/ScheduleStartPage.tsx

@@ -34,6 +34,7 @@ import {
 } from "@/shared/dictionaries/index.js";
 import type { IDictionaries } from "@/shared/dictionaries/index.js";
 import { buildScheduleUrl } from "../url.js";
+import { scheduleWindowBounds } from "@/shared/dateWindow.js";
 import "./ScheduleStartPage.scss";
 
 function toCityCode(code: string, dictionaries: IDictionaries | null): string {
@@ -64,17 +65,11 @@ function addDays(base: Date, days: number): Date {
 // scheduleSearchTo (330 days forward). Constrains both the outbound and
 // return-flight calendar pickers on the Schedule start page.
 function getScheduleMinDate(): Date {
-  const d = new Date();
-  d.setHours(0, 0, 0, 0);
-  d.setDate(d.getDate() - 1);
-  return d;
+  return scheduleWindowBounds()[0];
 }
 
 function getScheduleMaxDate(): Date {
-  const d = new Date();
-  d.setHours(0, 0, 0, 0);
-  d.setDate(d.getDate() + 330);
-  return d;
+  return scheduleWindowBounds()[1];
 }
 
 /**