Install composer on host during deploy so artisan commands work directly

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -55,4 +55,12 @@ jobs:
           script: |
             set -e
             cd ~/app
+
+            # Composer auf dem Host installieren falls nicht vorhanden
+            if [ ! -f ~/composer.phar ]; then
+              curl -sS https://getcomposer.org/installer | php -- --install-dir=~ --filename=composer.phar
+            fi
+            php ~/composer.phar install --no-dev --optimize-autoloader
+
             docker compose up -d --build --remove-orphans
+            docker compose exec -T app php artisan migrate --force