fix: swap nosotros lead photo and drop header WhatsApp pill

Swap the lead team photo with the service/montaje photo (and give
the displaced group photo a spot in the support grid instead of
dropping it). Also remove the always-visible WhatsApp pill from the
desktop header nav since it duplicated the floating WhatsApp CTA and
the mobile drawer's own WhatsApp button.

src/components/SiteHeader.astro

@@ -37,17 +37,6 @@ const links = [
     </nav>
 
     <div class="nav-actions">
-      <!-- WhatsApp solo en desktop -->
-      <a
-        href="https://wa.me/34678171513?text=Hola%20MNQ%2C%20quiero%20cotizar%20mi%20evento"
-        class="btn btn-pill nav-wa"
-        target="_blank"
-        rel="noreferrer"
-        aria-label={whatsappAriaLabel}
-      >
-        WhatsApp
-      </a>
-
       <!-- Hamburger (mobile) -->
       <button class="nav-toggle" id="navToggle" aria-label="Abrir menú" aria-expanded="false">
         <span class="hb-bar"></span>
@@ -148,13 +137,6 @@ const links = [
     transform: translateY(-7px) rotate(-45deg);
   }
 
-  /* ── WhatsApp pill — oculto en mobile ── */
-  .nav-wa {
-    display: none;
-    font-size: 0.6875rem;
-    padding: 0.625rem 1.25rem;
-  }
-
   /* ── Mobile drawer ── */
   .mobile-nav {
     display: none;
@@ -196,7 +178,6 @@ const links = [
   @media (min-width: 48rem) {
     .site-logo-banner { height: 3.25rem; }
     .nav-toggle        { display: none; }
-    .nav-wa            { display: inline-flex; }
     .mobile-nav        { display: none !important; }
   }
 </style>