Add bus detail functionality and update organization selection UI

lib/pages/org_settings/page.dart

@@ -1,5 +1,6 @@
 import "dart:async";
 
+import "package:bus_running_record/constants.dart";
 import "package:bus_running_record/provider/collaboration_state.dart";
 import "package:file_picker/file_picker.dart";
 import "package:flutter/services.dart";
@@ -534,11 +535,7 @@ class _OrganizationSettingsPageState extends State<OrganizationSettingsPage> {
         organizationId: organizationId,
       );
       if (!mounted) return;
-      final base = Uri.base;
-      final origin = base.hasAuthority
-          ? "${base.scheme}://${base.authority}"
-          : "";
-      final inviteLink = "$origin/#/invite/$token";
+      final inviteLink = "https://$kAppHostname/#/invite/$token";
       setState(() {
         _inviteLink = inviteLink;
         _message = "Invite link generated.";