Added Provider and DetailPage

lib/services/checklist_provider.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+
+class ChecklistProvider extends ChangeNotifier {
+  int? _selectedChecklistId;
+
+  updateSelectedChecklist(int? checklistId, {bool silent = false}) {
+    _selectedChecklistId = checklistId;
+    if (!silent) notifyListeners();
+  }
+
+  int? get selectedChecklistId => _selectedChecklistId;
+}

lib/services/dbhelper.dart

@@ -34,6 +34,10 @@ class DbHelper {
     return 0;
   }
 
+  static Future<Checklist> getChecklistById(int id) async {
+    return ed.checklists.first;
+  }
+
   static Stream<AuthState> get authChangeEventStream =>
       _client.auth.onAuthStateChange;
 }