configure base path /tpf/ for subdirectory deployment, increase workbox cache limit

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

public/manifest.webmanifest

@@ -1,7 +1,7 @@
 {
 	"name": "TherapyFinder",
 	"short_name": "TherapyFinder",
-	"start_url": "/",
+	"start_url": "/tpf/",
 	"display": "standalone",
 	"background_color": "#ffffff",
 	"theme_color": "#09090b",