fix(cms): adjust caching behavior for development environment

- Modified cached function to bypass caching in development mode.
- Updated fetchOpenApi function to return cached data only if not in development mode, ensuring accurate API fetching during development.

src/lib/cms.ts

@@ -77,6 +77,7 @@ async function cached<T>(
   key: string,
   fn: () => Promise<T>,
 ): Promise<T> {
+  if (import.meta.env.DEV) return fn();
   const hit = cache.get(key);
   if (hit && hit.expires > Date.now()) return hit.value as T;
   const pending = inflight.get(key) as Promise<T> | undefined;
@@ -122,7 +123,7 @@ export function cacheStats(): { size: number; keys: string[] } {
  * Wird gecacht (einmal pro Request/Build).
  */
 export async function fetchOpenApi(): Promise<OpenApiSpec> {
-  if (openApiCache) return openApiCache;
+  if (openApiCache && !import.meta.env.DEV) return openApiCache;
   const base = getBaseUrl();
   const res = await fetch(`${base}/api-docs/openapi.json`);
   if (!res.ok) {

src/lib/components/Header.svelte

@@ -96,6 +96,7 @@
   <div class="flex items-center justify-between container-custom py-2">
     <a
       href="/"
+      aria-label={t(T.site_name_fallback)}
       class="logo flex items-center origin-left font-bold text-lg tracking-wide hover:scale-[1.12] transition-transform duration-200 ease-out relative"
     >
       {#if logoSvgHtml}
@@ -178,9 +179,10 @@
       </button>
       <button
         type="button"
-        class="p-2 -mr-2 hover:bg-stein-0/10 rounded-md transition-colors aria-expanded={menuOpen} flex items-center justify-center"
+        class="p-2 -mr-2 hover:bg-stein-0/10 rounded-md transition-colors flex items-center justify-center"
         aria-label={menuOpen ? t(T.header_menu_close) : t(T.header_menu_open)}
-        aria-controls="mobile-nav"
+        aria-controls={menuOpen ? "mobile-nav" : undefined}
+        aria-expanded={menuOpen}
         onclick={toggleMenu}
       >
         <span class="sr-only"