Fix: Cache-Control-Header für PHP (no-cache) und Assets (immutable)

apache/steuerkram.conf

@@ -19,6 +19,16 @@
         Require all denied
     </Directory>
 
+    # HTML-Seiten nie cachen (damit neue ?v=-URLs sofort wirken)
+    <FilesMatch "\.php$">
+        Header set Cache-Control "no-cache, must-revalidate"
+    </FilesMatch>
+
+    # Statische Assets aggressiv cachen (Cache-Busting via ?v= in der URL)
+    <FilesMatch "\.(css|js)$">
+        Header set Cache-Control "public, max-age=31536000, immutable"
+    </FilesMatch>
+
     ErrorLog ${APACHE_LOG_DIR}/error.log
     CustomLog ${APACHE_LOG_DIR}/access.log combined
 </VirtualHost>