Sitemap: kind filters leave it (noindex, canonical /items); the Workshop is indexable, as the sitemap said (#58)

ddiff --git a/server/http/discovery.js b/server/http/discovery.js
iindex fe7e4d3..2bb0bef 100644
---- a/server/http/discovery.js
++++ b/server/http/discovery.js
@@@ -65,12 +65,14 @@ async function catalog(inv) {
  }
  const kindsWithItems = ({ kinds, byKind }) => kinds.filter((k) => byKind.get(k.id).length);
  
--/** Every public URL: the static pages, /items, a page per kind with items, and each published item. */
--function catalogPages({ kinds, defs, byKind }) {
++/**
++ * Every indexable URL: the static pages, /items and each published item. A kind's filter (/items?kind=…) is not one:
++ * the page says noindex with /items as its canonical, so the sitemap listing it spent crawl on a duplicate.
++ */
++function catalogPages({ defs }) {
      return [
          ...publicPages(),
          CATALOG_PAGE,
--        ...kindsWithItems({ kinds, byKind }).map((k) => ({ path: kindPath(k.id), changefreq: 'weekly', priority: 0.6 })),
          ...defs.map((d) => ({ path: `/items/${d.id}`, changefreq: 'monthly', priority: 0.4 })),
      ];
  }
ddiff --git a/server/workshop/pages.js b/server/workshop/pages.js
iindex e421a99..1b1716b 100644
---- a/server/workshop/pages.js
++++ b/server/workshop/pages.js
@@@ -63,7 +63,8 @@ function createWorkshopRoutes(ctx) {
      r.get('/workshop', async (req, res) => {
          const published = await inv.workshopItems({ status: 'published', limit: 200 });
          page(req, res, {
--            title: 'The Workshop',
++            // A public page in search, as the sitemap says (it was noindex by default).
++            title: 'The Workshop', index: true,
              description: 'Badges made by people in the OpenVibe community, reviewed by staff, given free by their makers.',
              body: html`<h1>The Workshop</h1>
  <p class="lede">Badges made by people in the community. Make one, staff review it, then you give it to the people you choose: your viewers, your server, the friends you played with. Every badge here is free: nothing in the Workshop is sold or traded.</p>
ddiff --git a/test/discovery.test.js b/test/discovery.test.js
iindex 46577fb..3ec526d 100644
---- a/test/discovery.test.js
++++ b/test/discovery.test.js
@@@ -34,11 +34,12 @@ const PRIVATE = ['/auth/', '/api/'];
              assert.match(r.headers.get('content-type'), /^application\/xml/);
              assert.match(r.headers.get('cache-control') || '', /public, max-age=\d+/);
              for (const p of ['/', '/updates']) assert.ok(r.text.includes(`<loc>https://inventory.openvibe.network${p}</loc>`), `no ${p} entry`);
--            // The catalog: /items, each kind with items, and every published item.
++            // The catalog: /items and every published item. A kind's filter is noindex with /items as canonical: not listed.
              assert.ok(r.text.includes('<loc>https://inventory.openvibe.network/items</loc>'), 'no /items entry');
--            // This kind's URL has no '&', so it must appear exactly, unescaped — and with no stray '&amp;'.
--            assert.ok(r.text.includes('<loc>https://inventory.openvibe.network/items?kind=live.hat</loc>'), 'no /items?kind=live.hat entry');
--            assert.ok(!r.text.includes('items?kind=live.hat&amp;'), 'that URL must not gain an entity');
++            assert.ok(!r.text.includes('items?kind='), 'a kind filter is no sitemap entry');
++            assert.ok(r.text.includes('<loc>https://inventory.openvibe.network/workshop</loc>'), 'the Workshop is listed');
++            const ws = await t.get('/workshop');
++            assert.match(ws.text, /<meta name="robots" content="index, follow">/, 'and indexable');
              const items = [...r.text.matchAll(/<loc>https:\/\/inventory\.openvibe\.network\/items\/itd_/g)];
              assert.strictEqual(items.length, 70, `expected 70 item entries, got ${items.length}`);
              for (const p of ['/me', '/u/', '/api/']) assert.ok(!r.text.includes(`<loc>https://inventory.openvibe.network${p}`), `private path in sitemap: ${p}`);