fix: resolve Keystone QR scan button doing nothing

The button did nothing due to two issues:
1. Navigation targeted the root stack, rendering the scanner behind
   the modal. Fixed by navigating to KeystoneNavigator within the
   AddNewAccountNavigator stack.
2. The useCamera hook's async permission check caused a race condition
   where hasPermission was always false on first tap, and the fallback
   BottomSheetModal failed silently inside a ScrollView.

Removed the redundant permission gate entirely — DynamicQrScanner
already handles all camera permission states on mount.

Author: bryzettler

src/features/keystone/ConnectKeystoneStartScreen.tsx

@@ -1,140 +1,18 @@
-/* eslint-disable react/jsx-props-no-spreading */
 import Box from '@components/Box'
 import ButtonPressable from '@components/ButtonPressable'
 import SafeAreaBox from '@components/SafeAreaBox'
 import Text from '@components/Text'
 import { useNavigation } from '@react-navigation/native'
-import WarningKeystone from '@assets/images/warningKeystone.svg'
-import React, {
-  forwardRef,
-  ReactNode,
-  Ref,
-  useCallback,
-  useImperativeHandle,
-  useMemo,
-  useRef,
-} from 'react'
-import useCamera from '@hooks/useCamera'
-import { BottomSheetBackdrop, BottomSheetModal } from '@gorhom/bottom-sheet'
-import { useOpacity, useSpacing } from '@theme/themeHooks'
-import useBackHandler from '@hooks/useBackHandler'
-import { useTheme } from '@shopify/restyle'
+import React, { useCallback } from 'react'
 import { t } from 'i18next'
-import { Image, Linking, Platform } from 'react-native'
+import { Image } from 'react-native'
 import { AddNewAccountNavigationProp } from '../home/addNewAccount/addNewAccountTypes'
 
-type CameraPermissionBottomSheetAlertRef = {
-  show: () => void
-  dismiss: () => void
-}
-
-const CameraPermissionBottomSheetAlert = forwardRef(
-  (
-    { children }: { children: ReactNode },
-    ref: Ref<CameraPermissionBottomSheetAlertRef>,
-  ) => {
-    useImperativeHandle(ref, () => ({
-      show: () => {
-        bottomSheetModalRef.current?.present()
-      },
-      dismiss: () => {
-        bottomSheetModalRef.current?.dismiss()
-      },
-    }))
-
-    const bottomSheetModalRef = useRef<BottomSheetModal>(null)
-    const { backgroundStyle } = useOpacity('surfaceSecondary', 1)
-    const { m } = useSpacing()
-    const { colors } = useTheme()
-    const snapPoints = useMemo(() => ['40%'], [])
-    const sheetHandleStyle = useMemo(() => ({ padding: m }), [m])
-    const { handleDismiss } = useBackHandler(bottomSheetModalRef)
-    const handleIndicatorStyle = useMemo(() => {
-      return {
-        backgroundColor: colors.secondaryText,
-      }
-    }, [colors.secondaryText])
-    const renderBackdrop = useCallback(
-      (props) => (
-        <BottomSheetBackdrop
-          disappearsOnIndex={-1}
-          appearsOnIndex={0}
-          // eslint-disable-next-line react/jsx-props-no-spreading
-          {...props}
-        />
-      ),
-      [],
-    )
-
-    return (
-      <BottomSheetModal
-        ref={bottomSheetModalRef}
-        index={0}
-        backgroundStyle={backgroundStyle}
-        backdropComponent={renderBackdrop}
-        snapPoints={snapPoints}
-        handleStyle={sheetHandleStyle}
-        onDismiss={handleDismiss}
-        handleIndicatorStyle={handleIndicatorStyle}
-      >
-        {children}
-      </BottomSheetModal>
-    )
-  },
-)
-
-const WarningContent = () => {
-  const handleOpenSettings = () => {
-    if (Platform.OS === 'ios') {
-      Linking.openURL('app-settings:')
-    } else {
-      Linking.openSettings()
-    }
-  }
-  return (
-    <SafeAreaBox
-      flex={1}
-      justifyContent="center"
-      marginHorizontal="l"
-      edges={['bottom']}
-    >
-      <Box flex={1} justifyContent="center">
-        <Box alignItems="center">
-          <WarningKeystone />
-          <Text variant="body0" textAlign="center" marginVertical="l">
-            {t('keystone.connectKeystoneStart.warning') as string}
-          </Text>
-        </Box>
-      </Box>
-      <ButtonPressable
-        borderRadius="round"
-        onPress={handleOpenSettings}
-        backgroundColor="primaryText"
-        backgroundColorOpacityPressed={0.7}
-        backgroundColorDisabled="surfaceSecondary"
-        backgroundColorDisabledOpacity={0.5}
-        titleColorDisabled="black500"
-        titleColor="primary"
-        fontWeight="500"
-        title={t('keystone.connectKeystoneStart.ok')}
-        marginBottom="l"
-      />
-    </SafeAreaBox>
-  )
-}
-
 const ConnectKeystoneStart = () => {
-  const { hasPermission } = useCamera()
-  const cameraPermissionBottomSheetAlertRef =
-    useRef<CameraPermissionBottomSheetAlertRef>(null)
   const navigation = useNavigation<AddNewAccountNavigationProp>()
   const handleStart = useCallback(() => {
-    if (!hasPermission) {
-      cameraPermissionBottomSheetAlertRef.current?.show()
-    } else {
-      navigation.navigate('KeystoneNavigator')
-    }
-  }, [navigation, hasPermission])
+    navigation.navigate('KeystoneNavigator')
+  }, [navigation])
   return (
     <SafeAreaBox
       flex={1}
@@ -155,11 +33,6 @@ const ConnectKeystoneStart = () => {
           </Text>
         </Box>
       </Box>
-      <CameraPermissionBottomSheetAlert
-        ref={cameraPermissionBottomSheetAlertRef}
-      >
-        <WarningContent />
-      </CameraPermissionBottomSheetAlert>
       <ButtonPressable
         borderRadius="round"
         onPress={handleStart}