refactor: rename to KanzlAI-mGMT, pivot to Kanzleimanagement

New direction: law firm management (Fristen, Termine, case tracking)
instead of UPC case law search. Updated all references, Go module
path, and deployment info.

frontend/src/app/layout.tsx

@@ -13,8 +13,8 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata: Metadata = {
-  title: "KanzlAI",
-  description: "AI-powered toolkit for patent litigation",
+  title: "KanzlAI-mGMT",
+  description: "Kanzleimanagement online",
 };
 
 export default function RootLayout({

frontend/src/app/page.tsx

@@ -1,7 +1,7 @@
 export default function Home() {
   return (
     <main className="flex min-h-screen items-center justify-center">
-      <h1 className="text-4xl font-bold">KanzlAI</h1>
+      <h1 className="text-4xl font-bold">KanzlAI-mGMT</h1>
     </main>
   );
 }