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hooks/useShakeToShuffle.ts

@@ -1,28 +1,34 @@
 /**
  * useShakeToShuffle — accelerometer-based shake detection
- * Triggers callback when device is shaken hard enough
+ * Safely handles missing expo-sensors native module
  */
 import { useEffect, useRef } from 'react';
-import { Accelerometer } from 'expo-sensors';
 import * as Haptics from 'expo-haptics';
 
 const SHAKE_THRESHOLD = 2.2;
-const SHAKE_COOLDOWN  = 1500; // ms
+const SHAKE_COOLDOWN  = 1500;
 
 export function useShakeToShuffle(onShake: () => void) {
   const lastShake = useRef(0);
 
   useEffect(() => {
-    Accelerometer.setUpdateInterval(100);
-    const sub = Accelerometer.addListener(({ x, y, z }) => {
-      const acc = Math.sqrt(x * x + y * y + z * z);
-      const now = Date.now();
-      if (acc > SHAKE_THRESHOLD && now - lastShake.current > SHAKE_COOLDOWN) {
-        lastShake.current = now;
-        Haptics.notificationAsync(Haptics.NotificationFeedbackType.Success);
-        onShake();
-      }
-    });
-    return () => sub.remove();
+    let sub: { remove: () => void } | null = null;
+    try {
+      // Lazily import so missing native module doesn't crash on load
+      const { Accelerometer } = require('expo-sensors');
+      Accelerometer.setUpdateInterval(100);
+      sub = Accelerometer.addListener(({ x, y, z }: { x: number; y: number; z: number }) => {
+        const acc = Math.sqrt(x * x + y * y + z * z);
+        const now = Date.now();
+        if (acc > SHAKE_THRESHOLD && now - lastShake.current > SHAKE_COOLDOWN) {
+          lastShake.current = now;
+          Haptics.notificationAsync(Haptics.NotificationFeedbackType.Success).catch(() => {});
+          onShake();
+        }
+      });
+    } catch {
+      // expo-sensors not linked — shake disabled, no crash
+    }
+    return () => { try { sub?.remove(); } catch {} };
   }, [onShake]);
 }