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

components/blocks/ReferencesSlider.tsx

@@ -81,7 +81,7 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
   };
 
   return (
-    <section className="py-24 bg-neutral-dark text-white relative overflow-hidden">
+    <section id="referenzen" className="py-24 bg-neutral-dark text-white relative overflow-hidden">
       <div className="absolute inset-0 bg-gradient-to-b from-neutral-dark via-neutral-900 to-neutral-dark z-0" />
       
       <div className="container relative z-10 mb-12 flex flex-col md:flex-row justify-between items-end gap-6">
@@ -129,11 +129,11 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
                   
                   <HoverShineOverlay />
                   
-                  <div className="absolute bottom-6 left-8 right-8 transform translate-y-4 group-hover:translate-y-0 transition-transform duration-500 pointer-events-none">
-                    <span className="inline-block py-1.5 px-4 rounded-full bg-primary/30 backdrop-blur-md text-white text-xs font-bold uppercase tracking-widest mb-3 border border-primary/50">
+                  <div className="absolute bottom-6 left-6 right-6 transform translate-y-4 group-hover:translate-y-0 transition-transform duration-500 pointer-events-none bg-black/60 backdrop-blur-sm p-4 rounded-xl border border-white/10">
+                    <span className="inline-block py-1 px-3 rounded-full bg-primary/20 text-white text-[10px] font-bold uppercase tracking-widest mb-2 border border-primary/30">
                       {ref.category}
                     </span>
-                    <h4 className="font-heading text-2xl md:text-3xl font-bold line-clamp-2">{ref.title}</h4>
+                    <h4 className="font-heading text-xl md:text-2xl font-bold leading-tight break-words">{ref.title}</h4>
                   </div>
                 </div>
               </motion.div>