Add fullscreen functionality: introduce API methods for getting and updating fullscreen settings, implement caching for fullscreen state, and integrate fullscreen toggle in AdminSettings. Remove unused fullscreen icons from Layout component.

src/api/branding.ts

@@ -11,6 +11,10 @@ export interface AnimationEnabled {
   enabled: boolean
 }
 
+export interface FullscreenEnabled {
+  enabled: boolean
+}
+
 const BRANDING_CACHE_KEY = 'cabinet_branding'
 const LOGO_PRELOADED_KEY = 'cabinet_logo_preloaded'
 
@@ -121,4 +125,21 @@ export const brandingApi = {
     const response = await apiClient.patch<AnimationEnabled>('/cabinet/branding/animation', { enabled })
     return response.data
   },
+
+  // Get fullscreen enabled (public, no auth required)
+  getFullscreenEnabled: async (): Promise<FullscreenEnabled> => {
+    try {
+      const response = await apiClient.get<FullscreenEnabled>('/cabinet/branding/fullscreen')
+      return response.data
+    } catch {
+      // If endpoint doesn't exist, default to disabled
+      return { enabled: false }
+    }
+  },
+
+  // Update fullscreen enabled (admin only)
+  updateFullscreenEnabled: async (enabled: boolean): Promise<FullscreenEnabled> => {
+    const response = await apiClient.patch<FullscreenEnabled>('/cabinet/branding/fullscreen', { enabled })
+    return response.data
+  },
 }

src/components/layout/Layout.tsx

@@ -123,18 +123,6 @@ const WheelIcon = () => (
   </svg>
 )
 
-const FullscreenIcon = () => (
-  <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
-    <path strokeLinecap="round" strokeLinejoin="round" d="M3.75 3.75v4.5m0-4.5h4.5m-4.5 0L9 9M3.75 20.25v-4.5m0 4.5h4.5m-4.5 0L9 15M20.25 3.75h-4.5m4.5 0v4.5m0-4.5L15 9m5.25 11.25h-4.5m4.5 0v-4.5m0 4.5L15 15" />
-  </svg>
-)
-
-const ExitFullscreenIcon = () => (
-  <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
-    <path strokeLinecap="round" strokeLinejoin="round" d="M9 9V4.5M9 9H4.5M9 9L3.75 3.75M9 15v4.5M9 15H4.5M9 15l-5.25 5.25M15 9h4.5M15 9V4.5M15 9l5.25-5.25M15 15h4.5M15 15v4.5m0-4.5l5.25 5.25" />
-  </svg>
-)
-
 export default function Layout({ children }: LayoutProps) {
   const { t } = useTranslation()
   const location = useLocation()
@@ -142,7 +130,7 @@ export default function Layout({ children }: LayoutProps) {
   const [mobileMenuOpen, setMobileMenuOpen] = useState(false)
   const { toggleTheme, isDark } = useTheme()
   const [userPhotoUrl, setUserPhotoUrl] = useState<string | null>(null)
-  const { isTelegramWebApp, isFullscreen, isFullscreenSupported, toggleFullscreen, safeAreaInset, contentSafeAreaInset } = useTelegramWebApp()
+  const { isFullscreen, safeAreaInset, contentSafeAreaInset } = useTelegramWebApp()
 
   // Fetch enabled themes from API - same source of truth as AdminSettings
   const { data: enabledThemes } = useQuery({
@@ -372,20 +360,6 @@ export default function Layout({ children }: LayoutProps) {
 
             {/* Right side */}
             <div className="flex items-center gap-2 sm:gap-3">
-              {/* Fullscreen toggle - only show in Telegram WebApp */}
-              {isTelegramWebApp && isFullscreenSupported && (
-                <button
-                  onClick={toggleFullscreen}
-                  className="relative p-2.5 rounded-xl transition-all duration-300 hover:scale-110 active:scale-95
-                             dark:text-dark-400 dark:hover:text-dark-100 dark:hover:bg-dark-800
-                             text-champagne-500 hover:text-champagne-800 hover:bg-champagne-200/50"
-                  title={isFullscreen ? 'Exit fullscreen' : 'Fullscreen'}
-                  aria-label={isFullscreen ? 'Exit fullscreen' : 'Enter fullscreen'}
-                >
-                  {isFullscreen ? <ExitFullscreenIcon /> : <FullscreenIcon />}
-                </button>
-              )}
-
               {/* Theme toggle button - only show if both themes are enabled */}
               {canToggle && (
                 <button

src/hooks/useTelegramWebApp.ts

@@ -1,5 +1,25 @@
 import { useEffect, useState, useCallback } from 'react'
 
+const FULLSCREEN_CACHE_KEY = 'cabinet_fullscreen_enabled'
+
+// Get cached fullscreen setting
+export const getCachedFullscreenEnabled = (): boolean => {
+  try {
+    return localStorage.getItem(FULLSCREEN_CACHE_KEY) === 'true'
+  } catch {
+    return false
+  }
+}
+
+// Set cached fullscreen setting
+export const setCachedFullscreenEnabled = (enabled: boolean) => {
+  try {
+    localStorage.setItem(FULLSCREEN_CACHE_KEY, String(enabled))
+  } catch {
+    // localStorage not available
+  }
+}
+
 /**
  * Hook for Telegram WebApp API integration
  * Provides fullscreen mode, safe area insets, and other WebApp features
@@ -123,5 +143,15 @@ export function initTelegramWebApp() {
     if (webApp.disableVerticalSwipes) {
       webApp.disableVerticalSwipes()
     }
+
+    // Auto-enter fullscreen if enabled in settings (use cached value for instant response)
+    const fullscreenEnabled = getCachedFullscreenEnabled()
+    if (fullscreenEnabled && webApp.requestFullscreen && !webApp.isFullscreen) {
+      try {
+        webApp.requestFullscreen()
+      } catch (e) {
+        console.warn('Auto-fullscreen failed:', e)
+      }
+    }
   }
 }

src/pages/AdminSettings.tsx

@@ -5,6 +5,7 @@ import { Link } from 'react-router-dom'
 import { adminSettingsApi, SettingDefinition, SettingCategorySummary } from '../api/adminSettings'
 import { brandingApi, setCachedBranding } from '../api/branding'
 import { setCachedAnimationEnabled } from '../components/AnimatedBackground'
+import { setCachedFullscreenEnabled } from '../hooks/useTelegramWebApp'
 import { themeColorsApi } from '../api/themeColors'
 import { DEFAULT_THEME_COLORS, DEFAULT_ENABLED_THEMES } from '../types/theme'
 import { ColorPicker } from '../components/ColorPicker'
@@ -880,6 +881,21 @@ export default function AdminSettings() {
     },
   })
 
+  // Fullscreen toggle query and mutation
+  const { data: fullscreenSettings } = useQuery({
+    queryKey: ['fullscreen-enabled'],
+    queryFn: brandingApi.getFullscreenEnabled,
+  })
+
+  const updateFullscreenMutation = useMutation({
+    mutationFn: (enabled: boolean) => brandingApi.updateFullscreenEnabled(enabled),
+    onSuccess: (data) => {
+      // Update local cache immediately for instant effect
+      setCachedFullscreenEnabled(data.enabled)
+      queryClient.invalidateQueries({ queryKey: ['fullscreen-enabled'] })
+    },
+  })
+
   const updateNameMutation = useMutation({
     mutationFn: (name: string) => brandingApi.updateName(name),
     onSuccess: (data) => {
@@ -1229,6 +1245,29 @@ export default function AdminSettings() {
             </button>
           </div>
         </div>
+
+        {/* Fullscreen Toggle */}
+        <div className="mt-4 pt-4 border-t border-dark-700/50">
+          <div className="flex items-center justify-between">
+            <div>
+              <h3 className="text-sm font-medium text-dark-200">Авто-Fullscreen</h3>
+              <p className="text-xs text-dark-500 mt-0.5">
+                Автоматически открывать на полный экран в Telegram
+              </p>
+            </div>
+            <button
+              onClick={() => updateFullscreenMutation.mutate(!(fullscreenSettings?.enabled ?? false))}
+              disabled={updateFullscreenMutation.isPending}
+              className={`relative w-12 h-6 rounded-full transition-colors ${
+                (fullscreenSettings?.enabled ?? false) ? 'bg-accent-500' : 'bg-dark-600'
+              } ${updateFullscreenMutation.isPending ? 'opacity-50' : ''}`}
+            >
+              <div className={`absolute top-1 w-4 h-4 bg-white rounded-full transition-transform ${
+                (fullscreenSettings?.enabled ?? false) ? 'left-7' : 'left-1'
+              }`} />
+            </button>
+          </div>
+        </div>
       </div>
 
       {/* Theme Colors Card */}