feat(spaces): docs-kind spaces render as pure documentation repos

Adds a `kind` column to spaces ('project' default, 'docs' for Wiki).
Docs spaces skip projects/tasks fetches and render only the page tree.
Sidebar caret for docs spaces expands to top-level pages (#/page/:id).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/views/space.js

@@ -56,6 +56,39 @@ export async function render(main, ctx) {
   try { space = await api.get('/api/spaces/' + id); }
   catch (e) { mount(main, el('h1', { class: 'view-h1' }, 'Space not found'), el('p', { class: 'view-sub muted' }, e.message)); return; }
 
+  const docHead = el('div', { class: 'doc-head' },
+    el('h1', { class: 'view-h1', style: { margin: '0' } }, space.name),
+    exportMenu({
+      filenameBase: 'space-' + (space.slug || space.name),
+      getContent: async () => {
+        const allPages = await api.get(`/api/spaces/${id}/pages`).catch(() => []);
+        const full = await Promise.all(allPages.map(p => api.get('/api/pages/' + p.id).catch(() => null)));
+        const md = full.filter(Boolean).map(p => `# ${p.title}\n\n${p.body_md || ''}`).join('\n\n---\n\n');
+        return { title: space.name, md };
+      }
+    })
+  );
+  const descEl = el('p', { class: 'view-sub' }, space.description || el('span', { class: 'muted' }, 'No description.'));
+
+  if (space.kind === 'docs') {
+    // Docs-mode: pure documentation repo — no projects or tasks
+    const [pages, refs] = await Promise.all([
+      api.get(`/api/spaces/${id}/pages`).catch(() => []),
+      api.get(`/api/refs?space_id=${id}&limit=200`).catch(() => [])
+    ]);
+    mount(main,
+      docHead,
+      descEl,
+      el('div', { class: 'card' },
+        el('h3', {}, space.name),
+        (pages.length + refs.length) > 0
+          ? el('div', {}, renderPageTree(pages, refs))
+          : el('p', { class: 'muted' }, 'Nothing here yet.'))
+    );
+    return;
+  }
+
+  // Project-mode: full workspace with projects, tasks, and pages
   let projects = [];
   const [tasks, pages, refs] = await Promise.all([
     api.get(`/api/spaces/${id}/tasks?status=todo`).catch(() => []),