fix: correct USB connection check & settings reset condition

src/screens/CameraScreen.tsx

@@ -655,7 +655,7 @@ export default function CameraScreen({
       {/* Camera Preview Background */}
       <View style={styles.previewContainer}>
         <View style={styles.cameraWrapper}>
-          {!isObscured && isUsbConnected && !useFrontCamera ? (
+          {!isObscured && Platform.OS === 'android' && !useFrontCamera ? (
             <UsbCameraView 
               ref={usbCameraRef} 
               style={StyleSheet.absoluteFill} 

src/services/settings.ts

@@ -69,15 +69,13 @@ export async function loadSettings(): Promise<AppSettings> {
     const parsed = JSON.parse(content);
     
     // Reset to defaults if the app installation/update time has changed
-    // Allow a small drift margin (e.g. 5 seconds) just in case
-    if (parsed.appLastUpdate && currentUpdateTime) {
-      if (Math.abs(parsed.appLastUpdate - currentUpdateTime) > 5000) {
-        console.log(`App update detected. Resetting settings to default.`);
-        const defaults = { ...DEFAULT_SETTINGS, appLastUpdate: currentUpdateTime };
-        // Instantly save the new default settings to disk so they persist!
-        await saveSettings(defaults);
-        return defaults;
-      }
+    // Also reset if appLastUpdate is completely missing (updating from older version)
+    if (!parsed.appLastUpdate || (currentUpdateTime && Math.abs(parsed.appLastUpdate - currentUpdateTime) > 5000)) {
+      console.log(`App update detected. Resetting settings to default.`);
+      const defaults = { ...DEFAULT_SETTINGS, appLastUpdate: currentUpdateTime || Date.now() };
+      // Instantly save the new default settings to disk so they persist!
+      await saveSettings(defaults);
+      return defaults;
     }
 
     return { ...DEFAULT_SETTINGS, ...parsed, appLastUpdate: currentUpdateTime };