Optimierung markemacht.de und adametz.media für Live-Deploy.

Beide Sites mit lokalem Font-Hosting, WebP, Build-Pipeline, SEO-Basis,
HSTS, Performance-Tuning und aktualisierten Impressum/Datenschutz-Texten.

Co-authored-by: Cursor <cursoragent@cursor.com>

_markemacht.de/assets/components/header.html

@@ -21,7 +21,7 @@
     <a class="nav-cta" href="./audit.html">Audit anfragen</a>
 
     <button class="menu-btn" data-drawer-open aria-label="Menü öffnen" aria-controls="mobile-drawer" aria-expanded="false">
-      <span class="material-symbols-outlined" aria-hidden="true">menu</span>
+      <svg class="icon" aria-hidden="true"><use href="./assets/icons.svg#menu"></use></svg>
     </button>
   </div>
 </nav>
@@ -30,7 +30,7 @@
   <div class="mobile-drawer-head">
     <span class="nav-brand">MARKE MACHT</span>
     <button class="menu-btn" data-drawer-close aria-label="Menü schließen">
-      <span class="material-symbols-outlined" aria-hidden="true">close</span>
+      <svg class="icon" aria-hidden="true"><use href="./assets/icons.svg#close"></use></svg>
     </button>
   </div>
   <nav class="mobile-drawer-links" aria-label="Mobile Hauptnavigation">