feat: overhaul competence pages, unify brand colors, and polish site integrity

- Rewrote all 5 competence pages (Kabeltiefbau, Bohrtechnik, Glasfaser, Planung, Vermessung) with factual data from references
- Unified brand colors: replaced toxic neon green with brand-aligned teal (#10a379)
- Fixed ReferencesSlider injection in dynamic MDX pages
- Enhanced Footer with icon parity, improved branding placement, and unified hover effects
- Refined Header with 3D micro-animations and improved dropdown visibility
- Fixed localized tracking API (rewrites for /stats/api/send)
- Resolved ReferenceErrors in InteractiveGermanyMap and Header state management
- Cleaned reference titles and truncated metadata in lists

app/[locale]/referenzen/page.tsx

@@ -116,19 +116,19 @@ export default async function ReferenzenOverview(props: { params: Promise<{ loca
                   </h3>
                   
                   {/* Technical Meta Data */}
-                  <div className="grid grid-cols-[1fr_1fr] gap-4 mt-auto border-t border-neutral-100 pt-6 pr-16 md:pr-20 relative z-10">
+                  <div className="flex flex-col gap-3 mt-auto border-t border-neutral-100 pt-6 pr-16 md:pr-20 relative z-10">
                     <div className="min-w-0">
                       <span className="block text-[10px] uppercase tracking-widest text-neutral-400 font-bold mb-1">Kunde</span>
-                      <span className="flex items-center gap-1.5 text-sm font-semibold text-neutral-700">
-                        <Briefcase className="w-3.5 h-3.5 text-primary shrink-0" />
-                        <span className="truncate">{ref.frontmatter.client}</span>
+                      <span className="flex items-start gap-2 text-sm font-semibold text-neutral-700 leading-tight">
+                        <Briefcase className="w-3.5 h-3.5 text-primary shrink-0 mt-[2px]" />
+                        <span className="line-clamp-2">{ref.frontmatter.client}</span>
                       </span>
                     </div>
                     <div className="min-w-0">
                       <span className="block text-[10px] uppercase tracking-widest text-neutral-400 font-bold mb-1">Zeitraum</span>
-                      <span className="flex items-center gap-1.5 text-sm font-semibold text-neutral-700">
-                        <Calendar className="w-3.5 h-3.5 text-primary shrink-0" />
-                        <span className="truncate">{ref.frontmatter.dateString || new Date(ref.frontmatter.date).getFullYear()}</span>
+                      <span className="flex items-start gap-2 text-sm font-semibold text-neutral-700 leading-tight">
+                        <Calendar className="w-3.5 h-3.5 text-primary shrink-0 mt-[2px]" />
+                        <span className="line-clamp-2">{ref.frontmatter.dateString || new Date(ref.frontmatter.date).getFullYear()}</span>
                       </span>
                     </div>
                   </div>