Render index page for wiki

src/components/tree/List.astro

@@ -1,6 +1,6 @@
 ---
 import { Tree, pathify } from "@utils/tree";
-import { Maybe } from "purify-ts";
+import type { Maybe } from "purify-ts";
 
 
 interface Props {
@@ -18,9 +18,8 @@ const { tree, prefix } = Astro.props;
     <ul>
       {pages.map(page => 
         <li>
-          {Maybe.of(Maybe.catMaybes([prefix, page.slug]))
-            .filter(xs => xs.length > 0)
-            .map(xs => pathify(...xs))
+          {page.slug
+            .chain(slug => prefix.map(prefix => pathify(prefix, slug)))
             .mapOrDefault(href =>
               <a href={href}>{page.title}</a>,
               <span>{page.title}</span>

src/pages/wiki/[...slug].astro

@@ -20,8 +20,8 @@ const { Content } = await entry.render();
 ---
 
 <Base>
-  <Tree tree={tree} prefix={Maybe.of("/wiki/")}/>
   <main>
+    <Tree tree={tree} prefix={Maybe.of("/wiki/")}/>
     <Content />
   </main>
 </Base>

src/pages/wiki/index.astro

@@ -0,0 +1,17 @@
+---
+import Base from "@layouts/Base.astro";
+import Tree from "@components/tree/Tree.astro";
+import { collapse } from "@utils/tree";
+import { getCollection } from "astro:content";
+import { Maybe } from "purify-ts";
+
+const tree = collapse(await getCollection('wiki'));
+
+---
+
+<Base>
+  <main>
+    <Tree tree={tree} prefix={Maybe.of("wiki")}/>
+    siema
+  </main>
+</Base>