Give each route its own title and canonical, and add robots.txt plus a sitemap.

The root layout was stamping the homepage title and production root onto every page. Routes now supply a page segment through one em-dash template, canonicals follow the request path, and non-production hosts disallow crawlers.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/unit/publicSitemap.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from "vitest";
+import { getAllBlogPosts } from "../../lib/content";
+import { buildPublicSitemap } from "../../lib/publicSitemap";
+import { PRODUCTION_SITE_ORIGIN, sitemapUrl } from "../../lib/siteMetadata";
+import { USE_CASE_DETAIL_SLUGS } from "../../lib/useCaseSyntheticPost";
+
+describe("buildPublicSitemap", () => {
+  it("lists public marketing routes, blog posts, and use cases", () => {
+    const urls = buildPublicSitemap().map((entry) => entry.url);
+
+    expect(urls).toContain(PRODUCTION_SITE_ORIGIN);
+    expect(urls).toContain(sitemapUrl("/about"));
+    expect(urls).toContain(sitemapUrl("/learn"));
+    expect(urls).toContain(sitemapUrl("/templates"));
+    expect(urls).toContain(sitemapUrl("/blog"));
+    expect(urls).toContain(sitemapUrl("/use-cases"));
+    expect(urls).toContain(sitemapUrl("/how-it-works"));
+    expect(urls).toContain(sitemapUrl("/privacy"));
+    expect(urls).toContain(sitemapUrl("/terms"));
+    expect(urls).toContain(sitemapUrl("/cookies"));
+
+    for (const post of getAllBlogPosts()) {
+      expect(urls).toContain(sitemapUrl(`/blog/${post.slug}`));
+    }
+    for (const slug of USE_CASE_DETAIL_SLUGS) {
+      expect(urls).toContain(sitemapUrl(`/use-cases/${slug}`));
+      expect(urls).toContain(sitemapUrl(`/use-cases/${slug}/rule`));
+    }
+  });
+
+  it("omits signed-in, admin, and API routes", () => {
+    const urls = buildPublicSitemap().map((entry) => entry.url);
+    expect(urls.some((url) => url.includes("/login"))).toBe(false);
+    expect(urls.some((url) => url.includes("/profile"))).toBe(false);
+    expect(urls.some((url) => url.includes("/create"))).toBe(false);
+    expect(urls.some((url) => url.includes("/monitor"))).toBe(false);
+    expect(urls.some((url) => url.includes("/api/"))).toBe(false);
+  });
+});