feat: implement admin panel functionality in Mini App

- Added new API endpoints for admin features: `GET /api/admin/me`, `GET /api/admin/users`, and `PATCH /api/admin/duties/:id` to manage user duties.
- Introduced `UserForAdmin` and `AdminDutyReassignBody` schemas for handling admin-related data.
- Updated documentation to include Mini App design guidelines and admin panel functionalities.
- Enhanced tests for admin API to ensure proper access control and functionality.
- Improved error handling and localization for admin actions.

webapp-next/src/app/page.tsx

@@ -12,6 +12,8 @@ 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 { fetchAdminMe } from "@/lib/api";
+import { getLang } from "@/i18n/messages";
 import { AccessDeniedScreen } from "@/components/states/AccessDeniedScreen";
 import { CurrentDutyView } from "@/components/current-duty/CurrentDutyView";
 import { CalendarPage } from "@/components/CalendarPage";
@@ -24,6 +26,15 @@ export default function Home() {
 
   useAppInit({ isAllowed, startParam });
 
+  const setIsAdmin = useAppStore((s) => s.setIsAdmin);
+  useEffect(() => {
+    if (!isAllowed || !initDataRaw) {
+      setIsAdmin(false);
+      return;
+    }
+    fetchAdminMe(initDataRaw, getLang()).then(({ is_admin }) => setIsAdmin(is_admin));
+  }, [isAllowed, initDataRaw, setIsAdmin]);
+
   const { accessDenied, currentView, setCurrentView, setSelectedDay, appContentReady } =
     useAppStore(
       useShallow((s: AppState) => ({
@@ -50,7 +61,7 @@ export default function Home() {
   const content = accessDenied ? (
     <AccessDeniedScreen primaryAction="reload" />
   ) : currentView === "currentDuty" ? (
-    <div className="content-safe mx-auto flex min-h-screen w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6">
+    <div className="content-safe mx-auto flex min-h-[var(--tg-viewport-stable-height,100vh)] w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6">
       <CurrentDutyView
         onBack={handleBackFromCurrentDuty}
         openedFromPin={startParam === "duty"}