Fix share link routing: add initialLocation to GoRouter and fix download URL host

b0esche_cloud/lib/main.dart

@@ -16,7 +16,11 @@ import 'pages/public_file_viewer.dart';
 import 'theme/app_theme.dart';
 import 'injection.dart';
 
+import 'package:flutter/foundation.dart' show kIsWeb;
+import 'package:web/web.dart' as web;
+
 final GoRouter _router = GoRouter(
+  initialLocation: kIsWeb ? web.window.location.pathname + web.window.location.search : '/',
   routes: [
     GoRoute(path: '/', builder: (context, state) => const HomePage()),
     GoRoute(

go_cloud/internal/http/routes.go

@@ -2922,10 +2922,7 @@ func publicFileShareHandler(w http.ResponseWriter, r *http.Request, db *database
 	} else if r.TLS == nil {
 		scheme = "http"
 	}
-	host := r.Host
-	if host == "" {
-		host = "go.b0esche.cloud"
-	}
+	host := "www.b0esche.cloud"
 	downloadPath := fmt.Sprintf("%s://%s/public/share/%s/download?token=%s", scheme, host, token, url.QueryEscape(viewerToken))
 
 	// Determine file type