chore: avb transition and automated testing setup

app/[locale]/agb/page.tsx

@@ -3,7 +3,7 @@ import fs from "fs";
 import path from "path";
 
 export default function AGB() {
-  const filePath = path.join(process.cwd(), "context/agbs.md");
+  const filePath = path.join(process.cwd(), "context/avbs.md");
   const fileContent = fs.readFileSync(filePath, "utf8");
 
   // Split by double newlines to get major blocks (headers + their first paragraphs, or subsequent paragraphs)
@@ -74,7 +74,7 @@ export default function AGB() {
               <p className="text-slate-500 font-medium">{stand}</p>
             </div>
             <a
-              href="/assets/AGB MB Grid 3-2026.pdf"
+              href="/assets/AVB MB Grid 4-2026.pdf"
               download
               className="btn-primary !py-3 !px-6 flex items-center gap-2"
             >