Add haptic feedback to VoiceFAB on press

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/VoiceFAB.tsx

@@ -15,6 +15,7 @@ import {
 } from 'react-native';
 import { Ionicons } from '@expo/vector-icons';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import * as Haptics from 'expo-haptics';
 import { AppColors, BorderRadius } from '@/constants/theme';
 import { useVoiceCall } from '@/contexts/VoiceCallContext';
 
@@ -66,8 +67,9 @@ export function VoiceFAB({ onPress, style, disabled = false }: VoiceFABProps) {
     }
   }, [isCallActive, scale, opacity]);
 
-  // Press animation
+  // Press animation with haptic feedback
   const handlePressIn = () => {
+    Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Medium);
     Animated.spring(scale, {
       toValue: 0.9,
       friction: 5,