fix(app): iPad hardware Enter submits the composer

Fixes #810

packages/app/src/hooks/use-ios-hardware-keyboard-submit.ts

@@ -0,0 +1,34 @@
+import { useEffect, useRef } from "react";
+import {
+  addHardwareKeyboardSubmitListener,
+  setHardwareKeyboardSubmitEnabled,
+} from "@/native/ios-hardware-keyboard-submit";
+
+interface UseIosHardwareKeyboardSubmitInput {
+  isEnabled: boolean;
+  onSubmit: () => void;
+}
+
+export function useIosHardwareKeyboardSubmit(input: UseIosHardwareKeyboardSubmitInput) {
+  const onSubmitRef = useRef(input.onSubmit);
+
+  useEffect(() => {
+    onSubmitRef.current = input.onSubmit;
+  }, [input.onSubmit]);
+
+  useEffect(() => {
+    if (!input.isEnabled) {
+      return;
+    }
+
+    const subscription = addHardwareKeyboardSubmitListener(() => {
+      onSubmitRef.current();
+    });
+    setHardwareKeyboardSubmitEnabled(true);
+
+    return () => {
+      setHardwareKeyboardSubmitEnabled(false);
+      subscription.remove();
+    };
+  }, [input.isEnabled]);
+}