fix: add SSR safety checks for window.matchMedia in PWA components

components/pwa/service-worker-provider.tsx

@@ -101,6 +101,8 @@ export function ServiceWorkerProvider({ children }: { children: React.ReactNode
   }
 
   const setupInstallPrompt = () => {
+    if (typeof window === 'undefined') return
+
     // Listen for beforeinstallprompt event
     window.addEventListener('beforeinstallprompt', (e) => {
       console.log('[PWA] Install prompt available')