feat(sections): add SocialProofStrip component

Founder pedigree quote plus design-partner mailto CTA.
Uses auth.salesEmail (not auth.salesMailto) so we can pass a subject.

Two PENDING gates documented in the component:
  - [Founder Name] placeholder
  - 'ex-nJAMS' wording subject to trademark clearance

Component is created but not yet wired into index.astro.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/sections/SocialProofStrip.astro

@@ -0,0 +1,38 @@
+---
+import { getAuthConfig } from '../../config/auth';
+
+const auth = getAuthConfig();
+
+// PENDING — must be filled in before publish:
+//   1. [Founder Name] placeholder below.
+//   2. The "ex-nJAMS" mention is gated on Hendrik's trademark review
+//      (same pattern as WhyUs.astro §10 caveat). If the review is not
+//      cleared by publish time, drop the " · ex-nJAMS" suffix from the
+//      attribution line.
+const founderName = '[Founder Name]';
+const designPartnerSubject = 'Design partner enquiry — Cameleer';
+const designPartnerHref = `mailto:${auth.salesEmail}?subject=${encodeURIComponent(designPartnerSubject)}`;
+---
+<section class="border-b border-border">
+  <div class="max-w-content mx-auto px-6 py-16 md:py-20">
+    <div class="max-w-3xl mx-auto">
+      <p class="text-accent font-mono text-xs tracking-[0.25em] uppercase mb-4">
+        // Built by people who've done this before
+      </p>
+      <blockquote class="border-l-[3px] border-accent pl-5 max-w-[62ch]">
+        <p class="text-lg md:text-xl text-text italic leading-relaxed mb-3">
+          “We spent 15 years building integration monitoring for banks that couldn’t afford downtime. Cameleer is what we’d build today — purpose-built for Apache Camel, no retrofit.”
+        </p>
+        <footer class="text-sm font-mono text-text-muted">
+          — <span class="text-text">{founderName}</span>, co-founder · ex-nJAMS
+        </footer>
+      </blockquote>
+      <a
+        href={designPartnerHref}
+        class="inline-flex items-center gap-2 mt-7 font-mono text-sm text-cyan hover:text-accent transition-colors"
+      >
+        Apply to the design-partner program <span aria-hidden="true">→</span>
+      </a>
+    </div>
+  </div>
+</section>