diff --git a/src/components/layout/Layout.tsx b/src/components/layout/Layout.tsx
index 3c242ed..e7af97f 100644
--- a/src/components/layout/Layout.tsx
+++ b/src/components/layout/Layout.tsx
@@ -14,6 +14,7 @@ import { wheelApi } from '../../api/wheel'
 import { themeColorsApi } from '../../api/themeColors'
 import { promoApi } from '../../api/promo'
 import { useTheme } from '../../hooks/useTheme'
+import { useTelegramWebApp } from '../../hooks/useTelegramWebApp'
 
 // Fallback branding from environment variables
 const FALLBACK_NAME = import.meta.env.VITE_APP_NAME || 'Cabinet'
@@ -122,6 +123,18 @@ 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()
@@ -129,6 +142,7 @@ 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 } = useTelegramWebApp()
 
   // Fetch enabled themes from API - same source of truth as AdminSettings
   const { data: enabledThemes } = useQuery({
@@ -352,6 +366,20 @@ 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
diff --git a/src/hooks/useTelegramWebApp.ts b/src/hooks/useTelegramWebApp.ts
new file mode 100644
index 0000000..6f2b9a0
--- /dev/null
+++ b/src/hooks/useTelegramWebApp.ts
@@ -0,0 +1,113 @@
+import { useEffect, useState, useCallback } from 'react'
+
+/**
+ * Hook for Telegram WebApp API integration
+ * Provides fullscreen mode, safe area insets, and other WebApp features
+ */
+export function useTelegramWebApp() {
+  const [isFullscreen, setIsFullscreen] = useState(false)
+  const [isTelegramWebApp, setIsTelegramWebApp] = useState(false)
+  const [safeAreaInset, setSafeAreaInset] = useState({ top: 0, bottom: 0, left: 0, right: 0 })
+
+  const webApp = typeof window !== 'undefined' ? window.Telegram?.WebApp : undefined
+
+  useEffect(() => {
+    if (!webApp) {
+      setIsTelegramWebApp(false)
+      return
+    }
+
+    setIsTelegramWebApp(true)
+    setIsFullscreen(webApp.isFullscreen || false)
+    setSafeAreaInset(webApp.safeAreaInset || { top: 0, bottom: 0, left: 0, right: 0 })
+
+    // Expand WebApp to full height
+    webApp.expand()
+    webApp.ready()
+
+    // Listen for fullscreen changes
+    const handleFullscreenChanged = () => {
+      setIsFullscreen(webApp.isFullscreen || false)
+      setSafeAreaInset(webApp.safeAreaInset || { top: 0, bottom: 0, left: 0, right: 0 })
+    }
+
+    webApp.onEvent('fullscreenChanged', handleFullscreenChanged)
+
+    return () => {
+      webApp.offEvent('fullscreenChanged', handleFullscreenChanged)
+    }
+  }, [webApp])
+
+  const requestFullscreen = useCallback(() => {
+    if (webApp?.requestFullscreen) {
+      try {
+        webApp.requestFullscreen()
+      } catch (e) {
+        console.warn('Fullscreen not supported:', e)
+      }
+    }
+  }, [webApp])
+
+  const exitFullscreen = useCallback(() => {
+    if (webApp?.exitFullscreen) {
+      try {
+        webApp.exitFullscreen()
+      } catch (e) {
+        console.warn('Exit fullscreen failed:', e)
+      }
+    }
+  }, [webApp])
+
+  const toggleFullscreen = useCallback(() => {
+    if (isFullscreen) {
+      exitFullscreen()
+    } else {
+      requestFullscreen()
+    }
+  }, [isFullscreen, requestFullscreen, exitFullscreen])
+
+  const disableVerticalSwipes = useCallback(() => {
+    if (webApp?.disableVerticalSwipes) {
+      webApp.disableVerticalSwipes()
+    }
+  }, [webApp])
+
+  const enableVerticalSwipes = useCallback(() => {
+    if (webApp?.enableVerticalSwipes) {
+      webApp.enableVerticalSwipes()
+    }
+  }, [webApp])
+
+  // Check if fullscreen is supported (Bot API 8.0+)
+  const isFullscreenSupported = Boolean(webApp?.requestFullscreen)
+
+  return {
+    isTelegramWebApp,
+    isFullscreen,
+    isFullscreenSupported,
+    safeAreaInset,
+    requestFullscreen,
+    exitFullscreen,
+    toggleFullscreen,
+    disableVerticalSwipes,
+    enableVerticalSwipes,
+    webApp,
+  }
+}
+
+/**
+ * Initialize Telegram WebApp on app start
+ * Call this in main.tsx or App.tsx
+ */
+export function initTelegramWebApp() {
+  const webApp = window.Telegram?.WebApp
+  if (webApp) {
+    webApp.ready()
+    webApp.expand()
+
+    // Disable vertical swipes to prevent accidental closing
+    if (webApp.disableVerticalSwipes) {
+      webApp.disableVerticalSwipes()
+    }
+  }
+}
diff --git a/src/main.tsx b/src/main.tsx
index 8deee7f..8a759f0 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -6,9 +6,13 @@ import App from './App'
 import { ThemeColorsProvider } from './providers/ThemeColorsProvider'
 import { ToastProvider } from './components/Toast'
 import { initLogoPreload } from './api/branding'
+import { initTelegramWebApp } from './hooks/useTelegramWebApp'
 import './i18n'
 import './styles/globals.css'
 
+// Initialize Telegram WebApp (expand, disable swipes)
+initTelegramWebApp()
+
 // Preload logo from cache immediately on page load
 initLogoPreload()
 
diff --git a/src/pages/Wheel.tsx b/src/pages/Wheel.tsx
index cc2f545..9bb871d 100644
--- a/src/pages/Wheel.tsx
+++ b/src/pages/Wheel.tsx
@@ -6,6 +6,15 @@ import FortuneWheel from '../components/wheel/FortuneWheel'
 import InsufficientBalancePrompt from '../components/InsufficientBalancePrompt'
 import { useCurrency } from '../hooks/useCurrency'
 
+// Pre-calculated confetti positions (stable across re-renders)
+const CONFETTI_POSITIONS = Array.from({ length: 20 }, (_, i) => ({
+  color: ['#fbbf24', '#a855f7', '#3b82f6', '#10b981', '#f43f5e'][i % 5],
+  left: `${(i * 17 + 5) % 95}%`,
+  top: `${(i * 23 + 3) % 90}%`,
+  delay: `${(i * 0.1) % 2}s`,
+  duration: `${1 + (i % 3) * 0.3}s`,
+}))
+
 // Icons
 const StarIcon = () => (
   <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 24 24">
@@ -98,10 +107,12 @@ export default function Wheel() {
   }, [config, isTelegramMiniApp])
 
   // Function to poll for new spin result after Stars payment
-  const pollForSpinResult = useCallback(async (maxAttempts = 15, delayMs = 800) => {
+  const pollForSpinResult = useCallback(async (signal: AbortSignal, maxAttempts = 15, delayMs = 800) => {
     // Wait a bit before first poll to give the bot time to process the payment
     await new Promise(resolve => setTimeout(resolve, 1500))
 
+    if (signal.aborted) return null
+
     // Get current history to find the latest spin ID
     let historyBefore
     try {
@@ -112,8 +123,12 @@ export default function Wheel() {
     const lastSpinIdBefore = historyBefore.items.length > 0 ? historyBefore.items[0].id : 0
 
     for (let attempt = 0; attempt < maxAttempts; attempt++) {
+      if (signal.aborted) return null
+
       await new Promise(resolve => setTimeout(resolve, delayMs))
 
+      if (signal.aborted) return null
+
       try {
         const historyAfter = await wheelApi.getHistory(1, 1)
 
@@ -152,6 +167,16 @@ export default function Wheel() {
   // Ref to store pending Stars payment result
   const pendingStarsResultRef = useRef<SpinResult | null>(null)
   const isStarsSpinRef = useRef(false)
+  const pollingAbortRef = useRef<AbortController | null>(null)
+
+  // Cleanup polling on unmount
+  useEffect(() => {
+    return () => {
+      if (pollingAbortRef.current) {
+        pollingAbortRef.current.abort()
+      }
+    }
+  }, [])
 
   const starsInvoiceMutation = useMutation({
     mutationFn: wheelApi.createStarsInvoice,
@@ -163,6 +188,12 @@ export default function Wheel() {
             isStarsSpinRef.current = true
             pendingStarsResultRef.current = null
 
+            // Cancel any existing polling
+            if (pollingAbortRef.current) {
+              pollingAbortRef.current.abort()
+            }
+            pollingAbortRef.current = new AbortController()
+
             // Payment done - reset paying state immediately
             setIsPayingStars(false)
 
@@ -172,7 +203,10 @@ export default function Wheel() {
 
             // Poll for the result in the background - don't await here!
             // The result will be stored and shown when animation completes
-            pollForSpinResult().then((result) => {
+            const abortSignal = pollingAbortRef.current.signal
+            pollForSpinResult(abortSignal).then((result) => {
+              if (abortSignal.aborted) return
+
               queryClient.invalidateQueries({ queryKey: ['wheel-config'] })
               queryClient.invalidateQueries({ queryKey: ['wheel-history'] })
 
@@ -195,6 +229,8 @@ export default function Wheel() {
                 }
               }
             }).catch(() => {
+              if (abortSignal.aborted) return
+
               // Error polling, show generic success
               pendingStarsResultRef.current = {
                 success: true,
@@ -551,7 +587,7 @@ export default function Wheel() {
                   }`}
                   style={{
                     backgroundSize: '200% 100%',
-                    animation: !isSpinning && config.can_spin ? 'shimmer 3s linear infinite' : 'none',
+                    animation: !isSpinning && config.can_spin ? 'wheel-shimmer 3s linear infinite' : 'none',
                   }}
                 >
                   {/* Button glow effect */}
@@ -669,18 +705,18 @@ export default function Wheel() {
               <>
                 <div className="absolute top-0 left-0 w-32 h-32 bg-purple-500/20 rounded-full blur-3xl" />
                 <div className="absolute bottom-0 right-0 w-32 h-32 bg-indigo-500/20 rounded-full blur-3xl" />
-                {/* Confetti effect */}
+                {/* Confetti effect - using pre-calculated positions */}
                 <div className="absolute inset-0 overflow-hidden pointer-events-none">
-                  {Array.from({ length: 20 }).map((_, i) => (
+                  {CONFETTI_POSITIONS.map((pos, i) => (
                     <div
                       key={i}
                       className="absolute w-2 h-2 rounded-full animate-bounce"
                       style={{
-                        background: ['#fbbf24', '#a855f7', '#3b82f6', '#10b981', '#f43f5e'][i % 5],
-                        left: `${Math.random() * 100}%`,
-                        top: `${Math.random() * 100}%`,
-                        animationDelay: `${Math.random() * 2}s`,
-                        animationDuration: `${1 + Math.random()}s`,
+                        background: pos.color,
+                        left: pos.left,
+                        top: pos.top,
+                        animationDelay: pos.delay,
+                        animationDuration: pos.duration,
                       }}
                     />
                   ))}
@@ -747,12 +783,6 @@ export default function Wheel() {
         </div>
       )}
 
-      <style>{`
-        @keyframes shimmer {
-          0% { background-position: 200% 50%; }
-          100% { background-position: -200% 50%; }
-        }
-      `}</style>
     </div>
   )
 }
diff --git a/src/styles/globals.css b/src/styles/globals.css
index 6ff0bb5..2deee88 100644
--- a/src/styles/globals.css
+++ b/src/styles/globals.css
@@ -1003,6 +1003,11 @@
 }
 
 /* Fortune Wheel animations */
+@keyframes wheel-shimmer {
+  0% { background-position: 200% 50%; }
+  100% { background-position: -200% 50%; }
+}
+
 @keyframes wheel-glow {
   0%, 100% { filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.3)); }
   50% { filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.6)); }
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 466aecb..c881a6e 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -25,12 +25,35 @@ interface TelegramWebApp {
     auth_date: number
     hash: string
   }
+  version: string
+  platform: string
+  isExpanded: boolean
+  isClosingConfirmationEnabled: boolean
+  isVerticalSwipesEnabled: boolean
+  isFullscreen: boolean
+  isOrientationLocked: boolean
+  safeAreaInset: { top: number; bottom: number; left: number; right: number }
+  contentSafeAreaInset: { top: number; bottom: number; left: number; right: number }
   ready: () => void
   expand: () => void
   close: () => void
   openLink: (url: string, options?: { try_instant_view?: boolean; try_browser?: boolean }) => void
   openTelegramLink: (url: string) => void
   openInvoice: (url: string, callback?: (status: 'paid' | 'cancelled' | 'failed' | 'pending') => void) => void
+  // Fullscreen API (Bot API 8.0+)
+  requestFullscreen: () => void
+  exitFullscreen: () => void
+  lockOrientation: () => void
+  unlockOrientation: () => void
+  // Vertical swipes control
+  disableVerticalSwipes: () => void
+  enableVerticalSwipes: () => void
+  // Closing confirmation
+  enableClosingConfirmation: () => void
+  disableClosingConfirmation: () => void
+  // Event handlers
+  onEvent: (eventType: string, callback: () => void) => void
+  offEvent: (eventType: string, callback: () => void) => void
   MainButton: {
     text: string
     color: string