Enable React Native strict TypeScript API (#11459)

src/screens/Messages/JoinRequests.tsx

@@ -379,7 +379,7 @@ function JoinRequestsList({
               style={[a.flex_1, a.align_center, a.justify_center, a.py_4xl]}>
               <Loader size="xl" />
             </View>
-          ) : null
+          ) : undefined
         }
         contentContainerStyle={
           showFooter ? {paddingBottom: footerHeight} : undefined

src/screens/Messages/components/MessageComposer.tsx

@@ -189,7 +189,7 @@ export function MessageComposer({
       <View
         collapsable={false}
         ref={native(
-          (node: View) =>
+          (node: React.ComponentRef<typeof View>) =>
             void composerInternalApiRef.current?.setAutocompleteAnchor(node),
         )}>
         <GlassContainer
@@ -209,7 +209,9 @@ export function MessageComposer({
                     composerInternalApiRef.current?.insert(emoji.native)
                   }
                   nextFocusRef={() =>
-                    composerInternalApiRef.current?.input?.element
+                    composerInternalApiRef.current?.input
+                      ?.element as unknown as
+                      {focus: () => void} | null | undefined
                   }>
                   <EmojiPicker.Trigger label={l`Open emoji picker`}>
                     {({props, state, control}) => (