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

content/de/home.mdx

@@ -143,43 +143,5 @@ description: "Die E-TIB GmbH ist Ihr zuverlässiger Partner für komplexe Kabelt
   ]}
 />
 
-<HomeReferencesSlider
-  references={[
-    {
-      id: "1",
-      title: "Breitbandausbau FTTC, Planungsregion Spreewald",
-      slug: "breitbandausbau-fttc-spreewald",
-      category: "Telekommunikation",
-      image: "/assets/photos/DSC01123.JPG"
-    },
-    {
-      id: "2",
-      title: "Breitbandausbau FTTH, 29699 Bomlitz / 29690 Schwarmstedt",
-      slug: "breitbandausbau-ftth-bomlitz",
-      category: "Telekommunikation",
-      image: "/assets/photos/DSC00850.JPG"
-    },
-    {
-      id: "3",
-      title: "Neubau Kabeltrasse, 03149 Forst",
-      slug: "neubau-kabeltrasse-forst",
-      category: "Kabeltiefbau",
-      image: "/assets/photos/DSC01129.JPG"
-    },
-    {
-      id: "4",
-      title: "Kabelverbindung U30 - T10, 15890 Eisenhüttenstadt",
-      slug: "kabelverbindung-eisenhuettenstadt",
-      category: "Kabeltiefbau",
-      image: "/assets/photos/DSC00010.JPG"
-    },
-    {
-      id: "5",
-      title: "Einspeisung PV-Anlage 14728 Görne",
-      slug: "einspeisung-pv-goerne",
-      category: "Erneuerbare Energien",
-      image: "/assets/photos/DSC01123.JPG"
-    }
-  ]}
-/>
+<HomeReferencesSlider />