docs: note portfolio superseded by clade system portal

Add banner indicating this static portfolio is being superseded by the
Clade System Portal (dynamic, VeriSimDB-backed project explorer). Page
remains as a read-only archive.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

index.html

@@ -519,6 +519,15 @@ <h1>Hyperpolymath</h1>
     </div>
   </section>
 
+  <!-- Supersession notice -->
+  <div style="background: linear-gradient(90deg, #1a1a2e, #16213e); border: 1px solid #30363d; border-radius: 8px; margin: 16px auto; max-width: 800px; padding: 16px 24px; text-align: center; font-size: 0.95rem; color: #8b949e;">
+    <strong style="color: #fbbf24;">Note:</strong>
+    This static portfolio is being superseded by the
+    <strong style="color: #58a6ff;">Clade System Portal</strong> &mdash;
+    a dynamic, taxonomy-driven project explorer backed by VeriSimDB.
+    This page remains as a read-only archive.
+  </div>
+
   <nav>
     <div class="nav-container">
       <a href="#languages" class="nav-link">Languages</a>