feat: implement AccessDeniedScreen and enhance error handling

- Introduced AccessDeniedScreen component for improved user experience when access is denied, replacing the previous AccessDenied component.
- Updated CurrentDutyView and CalendarPage to handle access denied scenarios, displaying the new screen appropriately.
- Enhanced tests for CurrentDutyView and AccessDeniedScreen to ensure correct rendering and functionality under access denied conditions.
- Refactored localization messages to include new labels for access denied scenarios in both English and Russian.

webapp-next/src/components/CalendarPage.tsx

@@ -17,7 +17,6 @@ import { CalendarGrid } from "@/components/calendar/CalendarGrid";
 import { DutyList } from "@/components/duty/DutyList";
 import { DayDetail, type DayDetailHandle } from "@/components/day-detail";
 import { ErrorState } from "@/components/states/ErrorState";
-import { AccessDenied } from "@/components/states/AccessDenied";
 
 /** Fallback height (px) until ResizeObserver reports the sticky block size. Matches --calendar-block-min-height + pb-2 (260 + 8). */
 const STICKY_HEIGHT_FALLBACK_PX = 268;
@@ -51,7 +50,6 @@ export function CalendarPage({ isAllowed, initDataRaw }: CalendarPageProps) {
     loading,
     error,
     accessDenied,
-    accessDeniedDetail,
     duties,
     calendarEvents,
     selectedDay,
@@ -67,7 +65,6 @@ export function CalendarPage({ isAllowed, initDataRaw }: CalendarPageProps) {
       loading: s.loading,
       error: s.error,
       accessDenied: s.accessDenied,
-      accessDeniedDetail: s.accessDeniedDetail,
       duties: s.duties,
       calendarEvents: s.calendarEvents,
       selectedDay: s.selectedDay,
@@ -155,13 +152,10 @@ export function CalendarPage({ isAllowed, initDataRaw }: CalendarPageProps) {
         />
       </div>
 
-      {accessDenied && (
-        <AccessDenied serverDetail={accessDeniedDetail} className="my-3" />
-      )}
-      {!accessDenied && error && (
+      {error && (
         <ErrorState message={error} onRetry={retry} className="my-3" />
       )}
-      {!accessDenied && !error && (
+      {!error && (
         <DutyList
           scrollMarginTop={stickyBlockHeight}
           className="mt-2"