fix(ui): roter NEU-Badge, separate Nav-Pills, Footer-Headlines + Spalten

- AnnouncementBanner: führendes **bold** rendert als roter Pill-Badge
- Header: Kalender/Adressbuch/Suche je eigene Pill statt geteiltem Container
- LinkListBlock: uppercase raus, >4 Links → 4er-Spalten ab sm

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/lib/components/Header.svelte

@@ -193,9 +193,7 @@
                     </a>
                 {/if}
             {/each}
-            <div
-                class="ml-2 flex items-center gap-0.5 rounded-full border border-wald-700/15 bg-wald-700/8 px-2 py-1"
-            >
+            <div class="ml-2 flex items-center gap-1.5">
                 {#each socialLinks as social}
                     {@const isInternal = social.href.startsWith("/")}
                     {@const sActive = isInternal && isActiveLink(social.href, $page.url.pathname)}
@@ -203,7 +201,7 @@
                         href={social.href}
                         target={isInternal ? undefined : "_blank"}
                         rel={isInternal ? undefined : "noopener noreferrer"}
-                        class="px-1.5 py-0.5 rounded-full transition-opacity hover:opacity-70 inline-flex items-center gap-1.5 {sActive ? 'font-bold' : ''}"
+                        class="rounded-full border border-wald-700/15 bg-wald-700/8 px-2.5 py-1 transition-opacity hover:opacity-70 inline-flex items-center gap-1.5 {sActive ? 'font-bold' : ''}"
                         aria-current={sActive ? "page" : undefined}
                         aria-label={social.label || t(T.header_social_aria)}
                         title={social.label || t(T.header_social_aria)}
@@ -216,7 +214,7 @@
                 {/each}
                 <button
                     type="button"
-                    class="px-1.5 py-0.5 rounded-full transition-opacity hover:opacity-70 inline-flex items-center justify-center"
+                    class="rounded-full border border-wald-700/15 bg-wald-700/8 px-2.5 py-1 transition-opacity hover:opacity-70 inline-flex items-center justify-center"
                     aria-label={searchOpen
                         ? t(T.header_search_close)
                         : t(T.header_search_open)}