Fix composer install dir: use \$HOME instead of ~ in deploy script

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

.gitea/workflows/deploy.yml

@@ -57,10 +57,10 @@ jobs:
             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
+            if [ ! -f "$HOME/composer.phar" ]; then
+              curl -sS https://getcomposer.org/installer | php -- --install-dir="$HOME" --filename=composer.phar
             fi
-            php ~/composer.phar install --no-dev --optimize-autoloader
+            php "$HOME/composer.phar" install --no-dev --optimize-autoloader
 
             docker compose up -d --build --remove-orphans
             docker compose exec -T app php artisan migrate --force