feat: add WordPress as runtime — Dockerfile, K8s env vars, wp-content PVC, frontend UI

Backend:
- Add WORDPRESS to AppRuntime enum
- Add wordpressDockerfile() using wordpress:6-php8.3-apache base image
  with custom theme/plugin/wp-content merge support
- Add WordPress-specific K8s env vars (WORDPRESS_DB_HOST, WORDPRESS_DB_USER,
  WORDPRESS_DB_PASSWORD, WORDPRESS_DB_NAME, WORDPRESS_TABLE_PREFIX)
- Create wp-content PersistentVolumeClaim (2Gi) for WordPress deployments
- Mount wp-content PVC in deployment container at /var/www/html/wp-content

Frontend:
- Add 'wordpress' to runtime type unions (Application, CreateApplicationDto)
- Add WordPress runtime card in deploy page (port 80, blue icon)
- Auto-select MySQL database when WordPress is chosen, disable other DB options
- Show Persian hint 'وردپرس به MySQL نیاز دارد' when WordPress selected
- Update all runtime icon colors across dashboard, apps, admin/apps pages
  to show blue-600 for WordPress

backend/src/build/build.service.ts

@@ -288,6 +288,8 @@ export class BuildService {
         return this.nodeDockerfile(app);
       case AppRuntime.LARAVEL:
         return this.laravelDockerfile(app);
+      case AppRuntime.WORDPRESS:
+        return this.wordpressDockerfile(app);
       default:
         throw new Error(`Unsupported runtime: ${app.runtime}`);
     }
@@ -384,6 +386,39 @@ CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]
 `;
   }
 
+  private wordpressDockerfile(app: Application): string {
+    return `FROM wordpress:6-php8.3-apache
+
+# Install additional PHP extensions commonly needed by WordPress
+RUN docker-php-ext-install opcache
+
+# Enable Apache mod_rewrite for pretty permalinks
+RUN a2enmod rewrite
+
+# Copy user's custom themes, plugins, and uploads if provided
+COPY . /tmp/user-content
+
+# Merge user content into the WordPress installation
+# - wp-content/themes, wp-content/plugins, wp-content/uploads
+# - Also support full WordPress roots (with wp-config.php, etc.)
+RUN if [ -d /tmp/user-content/wp-content ]; then \\
+      cp -a /tmp/user-content/wp-content/. /var/www/html/wp-content/; \\
+    fi && \\
+    if [ -f /tmp/user-content/wp-config.php ]; then \\
+      cp /tmp/user-content/wp-config.php /var/www/html/wp-config.php; \\
+    fi && \\
+    # Copy any loose PHP files (custom root files)
+    find /tmp/user-content -maxdepth 1 -name "*.php" ! -name "wp-config.php" -exec cp {} /var/www/html/ \\\\; 2>/dev/null || true && \\
+    rm -rf /tmp/user-content
+
+# Set proper ownership
+RUN chown -R www-data:www-data /var/www/html
+
+EXPOSE 80
+CMD ["apache2-foreground"]
+`;
+  }
+
   private async waitForJobCompletion(
     batchApi: k8s.BatchV1Api,
     coreApi: k8s.CoreV1Api,