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/app/page.test.tsx

@@ -4,17 +4,14 @@
  */
 
 import { describe, it, expect, beforeEach, vi } from "vitest";
-import { render, screen, waitFor } from "@testing-library/react";
+import { render, screen, waitFor, act } from "@testing-library/react";
 import Page from "./page";
 import { resetAppStore } from "@/test/test-utils";
 import { useAppStore } from "@/store/app-store";
+import { useTelegramAuth } from "@/hooks/use-telegram-auth";
 
 vi.mock("@/hooks/use-telegram-auth", () => ({
-  useTelegramAuth: () => ({
-    initDataRaw: "test-init",
-    startParam: undefined,
-    isLocalhost: true,
-  }),
+  useTelegramAuth: vi.fn(),
 }));
 
 vi.mock("@/hooks/use-month-data", () => ({
@@ -26,6 +23,11 @@ vi.mock("@/hooks/use-month-data", () => ({
 describe("Page", () => {
   beforeEach(() => {
     resetAppStore();
+    vi.mocked(useTelegramAuth).mockReturnValue({
+      initDataRaw: "test-init",
+      startParam: undefined,
+      isLocalhost: true,
+    });
   });
 
   it("renders calendar and header when store has default state", async () => {
@@ -51,4 +53,27 @@ describe("Page", () => {
       expect(document.title).toBe("Календарь дежурств");
     });
   });
+
+  it("renders AccessDeniedScreen when not allowed and delay has passed", async () => {
+    const { RETRY_DELAY_MS } = await import("@/lib/constants");
+    vi.mocked(useTelegramAuth).mockReturnValue({
+      initDataRaw: undefined,
+      startParam: undefined,
+      isLocalhost: false,
+    });
+    vi.useFakeTimers();
+    render(<Page />);
+    await act(async () => {
+      vi.advanceTimersByTime(RETRY_DELAY_MS);
+    });
+    vi.useRealTimers();
+    expect(
+      await screen.findByText(/Access denied|Доступ запрещён/i, {}, { timeout: 2000 })
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Open the app again from Telegram|Откройте приложение снова из Telegram/i)
+    ).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: /Reload|Обновить/i })).toBeInTheDocument();
+    expect(screen.queryByRole("grid", { name: "Calendar" })).not.toBeInTheDocument();
+  });
 });

webapp-next/src/app/page.tsx

@@ -6,12 +6,13 @@
 "use client";
 
 import { useCallback, useEffect } from "react";
-import { useAppStore } from "@/store/app-store";
+import { useAppStore, type AppState } from "@/store/app-store";
 import { useShallow } from "zustand/react/shallow";
 import { useTelegramTheme } from "@/hooks/use-telegram-theme";
 import { useTelegramAuth } from "@/hooks/use-telegram-auth";
 import { useAppInit } from "@/hooks/use-app-init";
 import { callMiniAppReadyOnce } from "@/lib/telegram-ready";
+import { AccessDeniedScreen } from "@/components/states/AccessDeniedScreen";
 import { CurrentDutyView } from "@/components/current-duty/CurrentDutyView";
 import { CalendarPage } from "@/components/CalendarPage";
 
@@ -23,9 +24,10 @@ export default function Home() {
 
   useAppInit({ isAllowed, startParam });
 
-  const { currentView, setCurrentView, setSelectedDay, appContentReady } =
+  const { accessDenied, currentView, setCurrentView, setSelectedDay, appContentReady } =
     useAppStore(
-      useShallow((s) => ({
+      useShallow((s: AppState) => ({
+        accessDenied: s.accessDenied,
         currentView: s.currentView,
         setCurrentView: s.setCurrentView,
         setSelectedDay: s.setSelectedDay,
@@ -45,17 +47,18 @@ export default function Home() {
     setSelectedDay(null);
   }, [setCurrentView, setSelectedDay]);
 
-  const content =
-    currentView === "currentDuty" ? (
-      <div className="mx-auto flex min-h-screen w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6 pt-safe">
-        <CurrentDutyView
-          onBack={handleBackFromCurrentDuty}
-          openedFromPin={startParam === "duty"}
-        />
-      </div>
-    ) : (
-      <CalendarPage isAllowed={isAllowed} initDataRaw={initDataRaw} />
-    );
+  const content = accessDenied ? (
+    <AccessDeniedScreen primaryAction="reload" />
+  ) : currentView === "currentDuty" ? (
+    <div className="mx-auto flex min-h-screen w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6 pt-safe">
+      <CurrentDutyView
+        onBack={handleBackFromCurrentDuty}
+        openedFromPin={startParam === "duty"}
+      />
+    </div>
+  ) : (
+    <CalendarPage isAllowed={isAllowed} initDataRaw={initDataRaw} />
+  );
 
   return (
     <div