vite

* replace next with vite
* disable strictmode (it interferes with collaboration in dev mode)

client/src/features/page/tree/components/fill-flex-parent.tsx

@@ -0,0 +1,28 @@
+import React, { ReactElement } from 'react';
+import { useElementSize } from '@mantine/hooks';
+import { useMergedRef } from '@mantine/hooks';
+
+type Props = {
+  children: (dimens: { width: number; height: number }) => ReactElement;
+};
+
+const style = {
+  flex: 1,
+  width: '100%',
+  height: '100%',
+  minHeight: 0,
+  minWidth: 0,
+};
+
+export const FillFlexParent = React.forwardRef(function FillFlexParent(
+  props: Props,
+  forwardRef
+) {
+  const { ref, width, height } = useElementSize();
+  const mergedRef = useMergedRef(ref, forwardRef);
+  return (
+    <div style={style} ref={mergedRef}>
+      {width && height ? props.children({ width, height }) : null}
+    </div>
+  );
+});