feat: redesign page heroes, implement organic markers, and streamline contact flow

- Refined hero sections for About, Blog, Websites, and Case Studies for a bespoke industrial entry point.
- Redesigned Marker component using layered SVG paths for an organic, hand-drawn highlighter effect.
- Restored technical precision in ArchitectureVisualizer with refined line thickness.
- Streamlined contact page by removing generic headers and prioritizing the configurator/gateway.
- Updated technical references to reflect self-hosted Gitea infrastructure.
- Cleaned up unused imports and addressed linting warnings across modified pages.

apps/web/src/components/blog/BlogCommandBar.tsx

@@ -41,7 +41,7 @@ export const BlogCommandBar: React.FC<BlogCommandBarProps> = ({
             type="text"
             value={searchQuery}
             onChange={(e) => onSearchChange(e.target.value)}
-            placeholder="Search posts..."
+            placeholder="Beiträge suchen..."
             className="w-full bg-transparent px-3 md:px-4 py-2 md:py-3 text-base md:text-lg text-slate-900 placeholder:text-slate-300 outline-none font-bold"
           />
           {searchQuery && (
@@ -49,7 +49,7 @@ export const BlogCommandBar: React.FC<BlogCommandBarProps> = ({
               onClick={() => onSearchChange("")}
               className="mr-2 px-2.5 py-1 md:px-3 md:py-1.5 bg-slate-100 hover:bg-slate-200 rounded-lg text-[9px] md:text-[10px] font-bold uppercase tracking-wider text-slate-500 hover:text-slate-900 transition-colors"
             >
-              Clear
+              Leeren
             </button>
           )}
         </div>