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/wheel/FortuneWheel.tsx

@@ -30,7 +30,7 @@ const FortuneWheel = memo(function FortuneWheel({
     if (isSpinning) {
       const interval = setInterval(() => {
         setLightPhase((p) => (p + 1) % 3); // Just toggle phase 0-1-2
-      }, 250); // Slower interval = better performance
+      }, 600); // Slower interval = better performance
       return () => clearInterval(interval);
     } else {
       setLightPhase(0);