Remove top padding from shell, move down into individual screens (#5548)

src/components/Layout.tsx

@@ -0,0 +1,41 @@
+import React from 'react'
+import {View, ViewStyle} from 'react-native'
+import {StyleProp} from 'react-native'
+import {useSafeAreaInsets} from 'react-native-safe-area-context'
+
+import {atoms as a} from '#/alf'
+
+// Every screen should have a Layout component wrapping it.
+// This component provides a default padding for the top of the screen.
+// This allows certain screens to avoid the top padding if they want to.
+//
+// In a future PR I will add a unified header component to this file and
+// things like a preconfigured scrollview.
+
+/**
+ * Every screen should have a Layout.Screen component wrapping it.
+ * This component provides a default padding for the top of the screen
+ * and height/minHeight
+ */
+let Screen = ({
+  disableTopPadding,
+  style,
+  ...props
+}: React.ComponentProps<typeof View> & {
+  disableTopPadding?: boolean
+  style?: StyleProp<ViewStyle>
+}): React.ReactNode => {
+  const {top} = useSafeAreaInsets()
+  return (
+    <View
+      style={[
+        {paddingTop: disableTopPadding ? 0 : top},
+        a.util_screen_outer,
+        style,
+      ]}
+      {...props}
+    />
+  )
+}
+Screen = React.memo(Screen)
+export {Screen}