milestone: publish alpha version (#637)

- document folder
- full-text search
- blob storage
- basic edgeless support

Co-authored-by: tzhangchi <terry.zhangchi@outlook.com>
Co-authored-by: QiShaoXuan <qishaoxuan777@gmail.com>
Co-authored-by: DiamondThree <diamond.shx@gmail.com>
Co-authored-by: MingLiang Wang <mingliangwang0o0@gmail.com>
Co-authored-by: JimmFly <yangjinfei001@gmail.com>
Co-authored-by: Yifeng Wang <doodlewind@toeverything.info>
Co-authored-by: Himself65 <himself65@outlook.com>
Co-authored-by: lawvs <18554747+lawvs@users.noreply.github.com>
Co-authored-by: Qi <474021214@qq.com>

packages/app/src/hooks/use-current-page-meta.ts

@@ -0,0 +1,37 @@
+import { useCallback, useEffect, useState } from 'react';
+import { useAppState, PageMeta } from '@/providers/app-state-provider';
+
+export const useCurrentPageMeta = (): PageMeta | null => {
+  const { currentPage, currentWorkspace } = useAppState();
+
+  const pageMetaHandler = useCallback((): PageMeta | null => {
+    if (!currentPage || !currentWorkspace) {
+      return null;
+    }
+    return (
+      (currentWorkspace.meta.pageMetas.find(
+        p => p.id === currentPage.id
+      ) as PageMeta) ?? null
+    );
+  }, [currentPage, currentWorkspace]);
+
+  const [currentPageMeta, setCurrentPageMeta] = useState<PageMeta | null>(
+    pageMetaHandler
+  );
+
+  useEffect(() => {
+    setCurrentPageMeta(pageMetaHandler);
+
+    const dispose = currentWorkspace?.meta.pagesUpdated.on(() => {
+      setCurrentPageMeta(pageMetaHandler);
+    }).dispose;
+
+    return () => {
+      dispose?.();
+    };
+  }, [currentPage, currentWorkspace, pageMetaHandler]);
+
+  return currentPageMeta;
+};
+
+export default useCurrentPageMeta;