feat: content-UX — header search, metadata de-noise, icon/microcopy coherence, article composition

src/pages/login.astro

@@ -8,11 +8,10 @@ import Base from '../layouts/Base.astro';
       <img class="auth-logo" src="/brand/CTAO_Logo_positive.svg" alt="CTAO" />
       <span class="badge-mock">Mock — AAI integration pending</span>
       <h1>Sign in</h1>
-      <p class="muted">One account for all CTAO services. Authentication is handled by the
-      central <strong>CTAO AAI</strong> (single sign-on) — the portal never sees your password.</p>
+      {/* Auth pages are scanned, not read — one line, no reassurance prose */}
+      <p class="muted">Use your CTAO account — single sign-on via CTAO AAI.</p>
       <button class="btn btn-wide" type="button">Continue with your CTAO account</button>
-      <p class="notice">No account yet? <a>Register via CTAO AAI</a> · Access level follows
-      your CTAO role and permissions.</p>
+      <p class="notice">No account? <a>Register via CTAO AAI</a></p>
     </div>
   </section>
 </Base>