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/en/home.mdx

@@ -139,42 +139,4 @@ description: "E-TIB GmbH is your reliable partner for complex cable routes, hori
   ]}
 />
 
-<HomeReferencesSlider
-  references={[
-    {
-      id: "1",
-      title: "Broadband Expansion FTTC, Spreewald Planning Region",
-      slug: "broadband-expansion-fttc-spreewald",
-      category: "Telecommunications",
-      image: "/assets/photos/DSC01123.JPG"
-    },
-    {
-      id: "2",
-      title: "Broadband Expansion FTTH, 29699 Bomlitz / 29690 Schwarmstedt",
-      slug: "broadband-expansion-ftth-bomlitz",
-      category: "Telecommunications",
-      image: "/assets/photos/DSC00850.JPG"
-    },
-    {
-      id: "3",
-      title: "New Cable Route, 03149 Forst",
-      slug: "new-cable-route-forst",
-      category: "Cable Construction",
-      image: "/assets/photos/DSC01129.JPG"
-    },
-    {
-      id: "4",
-      title: "Cable Connection U30 - T10, 15890 Eisenhüttenstadt",
-      slug: "cable-connection-eisenhuettenstadt",
-      category: "Cable Construction",
-      image: "/assets/photos/DSC00010.JPG"
-    },
-    {
-      id: "5",
-      title: "PV System Feed-in 14728 Görne",
-      slug: "pv-system-feed-in-goerne",
-      category: "Renewable Energy",
-      image: "/assets/photos/DSC01123.JPG"
-    }
-  ]}
-/>
+<HomeReferencesSlider />