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/planung.mdx

@@ -0,0 +1,62 @@
+---
+title: "Planning and Consulting"
+date: "2024-03-20"
+excerpt: "Professional planning and consulting in the field of energy and telecommunications networks: route planning, approval procedures, and project review."
+layout: "fullBleed"
+---
+
+<HeroSection
+  badge="Core Competency"
+  title="Planning & Consulting"
+  subtitle="Competent support for energy and telecommunications networks"
+  backgroundImage={{ url: '/assets/photos/DJI_0048.JPG' }}
+  alignment="center"
+  ctaLabel="Request a project"
+  ctaHref="/en/kontakt"
+/>
+
+<ServiceDetailGrid
+  badge="Engineering Services"
+  title="Foundation for Success"
+  descriptionParagraphs={[
+    "Solid planning is the foundation of every successful construction project. Avoid expensive planning errors and benefit from our comprehensive expertise.",
+    "Our partner engineering firm **E-TIB Ingenieurgesellschaft mbH** supports us in the smooth implementation of complex network expansion projects."
+  ]}
+  panels={[
+    {
+      id: "planung",
+      title: "Planning",
+      icon: "planning",
+      fullWidth: false,
+      lists: [
+        [
+          "Structural planning",
+          "Approval planning",
+          "Execution planning",
+          "Consent planning"
+        ]
+      ]
+    },
+    {
+      id: "beratung",
+      title: "Consulting & Management",
+      icon: "planning",
+      fullWidth: false,
+      lists: [
+        [
+          "Tendering & awarding",
+          "Construction supervision",
+          "Project review",
+          "Feasibility studies"
+        ]
+      ]
+    }
+  ]}
+/>
+
+<CallToAction 
+  title="Do you need planning security?" 
+  text="Let's talk about your project. We are at your side with help and advice."
+  buttonText="Contact us"
+  buttonLink="/en/kontakt"
+/>