feat: migrate Payload CMS to MDX and harden static infrastructure

components/AgbHistoryBlock.tsx

@@ -1,18 +1,28 @@
 import React from 'react';
-import { getPayload } from 'payload';
-import configPromise from '@payload-config';
 import { Heading } from '@/components/ui';
+import fs from 'fs/promises';
+import path from 'path';
+import matter from 'gray-matter';
 
 export const AgbHistoryBlock: React.FC<{ title: string }> = async ({ title }) => {
-  const payload = await getPayload({ config: configPromise });
+  const agbs: any[] = [];
+  try {
+    const dir = path.join(process.cwd(), 'content', 'agbs');
+    const files = await fs.readdir(dir);
+    for (const f of files) {
+      if (!f.endsWith('.mdx')) continue;
+      const fileContent = await fs.readFile(path.join(dir, f), 'utf-8');
+      const { data } = matter(fileContent);
+      agbs.push({ id: f, ...data });
+    }
+    agbs.sort(
+      (a, b) => new Date(b.versionDate || 0).getTime() - new Date(a.versionDate || 0).getTime(),
+    );
+  } catch (err) {
+    console.error('Failed reading AGBs from MDX:', err);
+  }
 
-  const agbs = await payload.find({
-    collection: 'agbs-collection',
-    sort: '-versionDate',
-    limit: 100,
-  });
-
-  if (agbs.totalDocs === 0) {
+  if (agbs.length === 0) {
     return null;
   }
 
@@ -22,15 +32,15 @@ export const AgbHistoryBlock: React.FC<{ title: string }> = async ({ title }) =>
         {title || 'Vorherige Versionen'}
       </Heading>
       <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
-        {agbs.docs.map((agb: any) => {
+        {agbs.map((agb: any) => {
           const date = new Date(agb.versionDate).toLocaleDateString('de-DE', {
             year: 'numeric',
             month: 'long',
             day: 'numeric',
           });
 
-          const fileUrl = typeof agb.file === 'object' ? agb.file.url : '';
-          const filename = typeof agb.file === 'object' ? agb.file.filename : 'agb.pdf';
+          const fileUrl = agb.file?.url || agb.fileUrl || '';
+          const filename = agb.file?.filename || agb.filename || 'agb.pdf';
 
           return (
             <div