feat: rebuild mintel.me as a single-page freelance site

The site now presents one freelance developer on one page: hero, introduction,
four typical cases (developer for a product, make an app reliable, automate a
process, a website) with what you get, how it runs and what it costs, a
process automation section, technology and project fit, how I work, two live
references, questions and contact.

- Hero and closing headline are drawn from running binary digits.
- Each case explains its four steps with an animated drawing; the automation
  section shows example workflows with work travelling between systems; a
  pipeline run shows what a test catches before a release.
- Contact is one email address, kept in parts and assembled in the browser so
  it never appears in the page source (src/domain/email.ts, spec first).
- Imprint and privacy pages added.
- The old site (blog, case studies, contact form, fixed-price pages, video
  rendering and related scripts) is removed. Its URLs redirect to the homepage.
- The deploy smoke test checks the legal pages and the redirects instead of
  the removed case study.
- Dev scripts use docker compose v2.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/app/(site)/imprint/page.tsx

@@ -0,0 +1,55 @@
+import type { Metadata } from "next";
+import { EmailLink } from "@/src/components/EmailLink";
+import { LegalPage, LegalSection } from "@/src/components/LegalPage";
+import { OWNER } from "@/src/content/site";
+
+export const metadata: Metadata = {
+  title: "Imprint",
+  description: "Legal notice (Impressum) for mintel.me.",
+  alternates: { canonical: "/imprint" },
+  robots: { index: false, follow: true },
+};
+
+const LINK = "font-bold text-slate-900 underline-offset-4 hover:underline";
+
+export default function ImprintPage() {
+  return (
+    <LegalPage title="Imprint">
+      <LegalSection heading="Information according to section 5 DDG">
+        <p>
+          {OWNER.name}
+          <br />
+          {OWNER.street}
+          <br />
+          {OWNER.city}
+          <br />
+          {OWNER.country}
+        </p>
+      </LegalSection>
+
+      <LegalSection heading="Contact">
+        <p>
+          Email: <EmailLink className={LINK} />
+        </p>
+      </LegalSection>
+
+      <LegalSection heading="VAT identification number">
+        <p>
+          VAT identification number according to section 27a of the German VAT
+          Act (Umsatzsteuergesetz): {OWNER.vatId}
+        </p>
+      </LegalSection>
+
+      <LegalSection heading="Responsible for the content">
+        <p>{OWNER.name}, address as above (section 18 paragraph 2 MStV).</p>
+      </LegalSection>
+
+      <LegalSection heading="Consumer dispute resolution">
+        <p>
+          I am neither willing nor obliged to take part in dispute resolution
+          proceedings before a consumer arbitration board.
+        </p>
+      </LegalSection>
+    </LegalPage>
+  );
+}