feat: redesign fortune wheel UI and add to mobile nav

- Add wheel button to mobile bottom nav (replaces Support when enabled)
- Slow down LED lights animation (250ms -> 600ms)
- Replace result modal with inline card in Wheel.tsx
- Add haptic feedback on spin result
- AdminWheel.tsx: inline prize editing instead of modal
- AdminWheel.tsx: drag-and-drop for prize reordering
- AdminWheel.tsx: live wheel preview on desktop
- AdminWheel.tsx: group settings into sections
- Replace confirm() with native dialog
- Add translations for all languages

src/components/layout/AppShell/AppShell.tsx

@@ -300,7 +300,7 @@ export function AppShell({ children }: AppShellProps) {
 
   // BackButton for Telegram Mini App
   // Don't show back button on main tab pages (bottom nav) - users navigate via tabs
-  const mainTabPaths = ['/', '/subscription', '/balance', '/referral', '/support'];
+  const mainTabPaths = ['/', '/subscription', '/balance', '/referral', '/support', '/wheel'];
   const isMainTabPage = mainTabPaths.includes(location.pathname);
   const handleBack = useCallback(() => {
     if (mobileMenuOpen) {
@@ -505,6 +505,7 @@ export function AppShell({ children }: AppShellProps) {
       <MobileBottomNav
         isKeyboardOpen={isKeyboardOpen}
         referralEnabled={referralTerms?.is_enabled}
+        wheelEnabled={wheelConfig?.is_enabled}
       />
     </div>
   );