chore: restore MultiViews and add all required Apache modules

- Restore MultiViews option in Directory configuration
- Add headers, rewrite, dir, and mime modules to enable script
- Keep remoteip and env modules for Traefik integration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apache/enable-modules.sh

@@ -1,6 +1,10 @@
 #!/bin/bash
 # Active les modules Apache nécessaires pour Nextcloud derrière Traefik
 
+a2enmod headers
+a2enmod rewrite
+a2enmod dir
+a2enmod mime
 a2enmod remoteip # Pour récupérer les vraies IPs clients
 a2enmod env      # Pour SetEnvIf (détection HTTPS)
 

apache/nextcloud.conf

@@ -9,7 +9,7 @@ RemoteIPTrustedProxy 192.168.0.0/16
 SetEnvIf X-Forwarded-Proto "https" HTTPS=on
 
 <Directory /var/www/html/>
-    Options +FollowSymLinks
+    Options FollowSymLinks MultiViews
     AllowOverride All
     Require all granted